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  • Articles  (2,142)
  • Polymer and Materials Science  (2,140)
  • Nycterisition lanceolatum  (2)
  • 1990-1994
  • 1980-1984
  • 1955-1959  (2,142)
  • 1925-1929
  • 1958  (872)
  • 1957  (651)
  • 1956  (619)
  • 1929
Collection
  • Articles  (2,142)
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  • 1990-1994
  • 1980-1984
  • 1955-1959  (2,142)
  • 1925-1929
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  • 1
    facet.materialart.
    Unknown
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.9 (1958) nr.1 p.21
    Publication Date: 2015-03-06
    Description: In the present study only those species of the genus Chrysophyllum have been incorporated which are found in the area covered by the Flora Malesiana, as well as those of Australia and New Caledonia. We express our most sincere thanks to the Curators of the State University at Leiden for allowing a grant, enabling a visit at the herbarium of Paris, to the Directors of the herbaria of Bogor, Brisbane, Canberra, Florence, Jamaica Plain, Kepong, Kew, Lae, Leiden, London, Melbourne, Montpellier, New York, Paris, Singapore, Sydney, Utrecht and Zürich for putting their respective material at our disposal, to Dr Bakhuizen van den Brink for rivising the Latin descriptions and to Miss M. van Leeuwen for doing most of the typewriting.
    Keywords: balansae ; beccarii ; brevicaule ; calomeris ; castanospermum ; curtisii ; dubium ; firmum ; floribundum ; francii ; javanicum ; ledermannii ; leptocladum ; longipes ; macrocarpum ; monopyrenum ; ? papuanicum ; parvifolium ; peninsulare ; philippense ; polynesicum ; ? pyriforme ; rhodoneurum ; roxburghii ; sebertii ; Lucuma amorphosperma ; chartacea ; lanceolata ; prunifera ; Niemeyera chartacea ; prunifera ; Nycterisition lanceolatum ; Ochrothallus ? balansae ; francii ; litseaeflorus ; sessilifolius ; intermedia ; leptoclada ; papuanica ; intermedia ; Sersalisia baileyana ; Sideroxylon derryanum ; papuanicum ; Tropalanthe lamii ; Trouettia intermedia ; leptoclada ; parvifolia
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 2
    facet.materialart.
    Unknown
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 9 no. 1, pp. 21-74
    Publication Date: 2024-01-12
    Description: In the present study only those species of the genus Chrysophyllum have been incorporated which are found in the area covered by the Flora Malesiana, as well as those of Australia and New Caledonia.\nWe express our most sincere thanks to the Curators of the State University at Leiden for allowing a grant, enabling a visit at the herbarium of Paris, to the Directors of the herbaria of Bogor, Brisbane, Canberra, Florence, Jamaica Plain, Kepong, Kew, Lae, Leiden, London, Melbourne, Montpellier, New York, Paris, Singapore, Sydney, Utrecht and Z\xc3\xbcrich for putting their respective material at our disposal, to Dr Bakhuizen van den Brink for rivising the Latin descriptions and to Miss M. van Leeuwen for doing most of the typewriting.
    Keywords: balansae ; beccarii ; brevicaule ; calomeris ; castanospermum ; curtisii ; dubium ; firmum ; floribundum ; francii ; javanicum ; ledermannii ; leptocladum ; longipes ; macrocarpum ; monopyrenum ; ? papuanicum ; parvifolium ; peninsulare ; philippense ; polynesicum ; ? pyriforme ; rhodoneurum ; roxburghii ; sebertii ; Lucuma amorphosperma ; chartacea ; lanceolata ; prunifera ; Niemeyera chartacea ; prunifera ; Nycterisition lanceolatum ; Ochrothallus ? balansae ; francii ; litseaeflorus ; sessilifolius ; intermedia ; leptoclada ; papuanica ; intermedia ; Sersalisia baileyana ; Sideroxylon derryanum ; papuanicum ; Tropalanthe lamii ; Trouettia intermedia ; leptoclada ; parvifolia
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 3
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 11-13 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: What about the Protection against RustMill cinder must be removed because of its proved unreliable behavior before any protective measures are taken. For preliminary steel priming pure minium or minium „V40“ should be used as these primings might remain on the surface of the steel. - The German Federal Railways (Bundesbahn) do not permit the use of blends except minium „V40“. - Phtalic acid resin binders are gaining increasing importance for underwater varnishing. - Real passivating agents must contain a sufficient amount of active oxygen. - Even paints which are rich in lead can be sprayed without danger if the official security regulations are complied with. - The durability is and will always be the single reliable determination of the quality of a paint.
    Notes: Die Walzhaut ist infolge ihrer erwiesenen Unzuverlässigkeit vor Beginn der eigentlichen Schutzmaßnahmen zu entfernen. Auch die „vorläufigen“ Stahlgrundierungen werden am besten mit reiner Bleimennige oder Bleimennige V40 ausgeführt, die dauernd auf der Stahlfläche verbleiben können. Mit Ausnahme der Bleimennige V40 sind bei der Bundesbahn nach wie vor keinerlei Verschnitte zugelassen. Im Unterwasser-Anstrich gewinnen die Phthalatharz-Bindemittel zunehmend an Bedeutung. „Echte“ Passivierungsmittel müssen genügend „aktivierbaren“ Sauerstoff enthalten. Bei Einhaltung der behördlichen Sicherheits-Vorschriften können auch bleireiche Anstrichstoffe gefahrlos im Spritzverfahren aufgetragen werden. Die Lebensdauer ist und bleibt der einzig zuverlässige Wertmesser für Anstrichstoffe.
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  • 4
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 1-6 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations on the Changing of the Properties f Water by Weak Direct CurrentsWeak direct currents of a certain tension which are applied to hot water supply and heating installations are well known to prevent the corrosion of the walls being in touch of water if the supply points are not too far away. Today nobody denies any more the existence of this cathodic protection though its mechanism has not yet been cleared. For more than twenty years experts assert that weak direct currents would alter the chemical behavior of water so that aggressive water becomes unaggressive and scale depositing water would lose this property. This has always been controverted. But as the latter maintaining could be confirmed by many practical experiences in working plants and as there is no explanation for such an effectiveness of weak direct currents investigations were carried out in working hot water supply and heating installations protected by weak direct currents. These experiments had to clear the change of the properties of the water and whether the result would allow to explain the anti-corrosive and anti-scale effectiveness of weak cathodic currents. This article contains the hitherto obtained results of these investigations.
    Notes: Es ist bekannt, daß schwacher, niedrig gespannter Gleichstrom bestimmter Stärke, der in Warmwasserversorgungs- und Heizungsanlagen an geeigneter Stelle künstlich eingeführt wird, Korrosion auf den wasserberührten Wandungen dieser Anlagen, soweit deren Entfernung von der Stromeinführungsstelle ein bestimmtes Maß nicht überschreitet, zu verhüten vermag. Das Vorhandensein dieses „kathodischen Schutzes“ wird heute nicht mehr bestritten, wenn man auch sein wahres Wesen bis jetzt noch nicht klar erklären kann. Bestritten wird aber noch immer die sei etwa 20 Jahren von Praktikern aufgestellte Behauptung, daß schwacher, niedrig gespannter Gleichstrom die chemische Beschaffenheit des vom Strom durchflossenen Wassers so zu verändern vermag, daß von Natur aggressives Wasser nicht aggressiv wird und steinbildendes Wasser die Steinbildungsfähigkeit verliert. Weil nun diese letztere Behauptung durch viele praktische Erfahrungen in betriebenen Anlagen bestätigt wird, aber Gründe für die behauptete Wirksamkeit des schwachen Gleichstroms bisher nicht erkennbar sind, wurden Untersuchungen in betriebenen, durch Aufprägung von schwachem Gleichstrom geschützten Warmwasserversorgungs- und Heizungsanlagen durchgeführt, die zunächst feststellen sollten, worin diese Veränderung besteht, und ob sie die korrosions-und steinverhütende Wirkung von künstlich aufgeprägtem schwachen Gleichstrom erklären kann. Der vorliegende Aufsatz enthält die bisherigen Ergebnisse dieser Untersuchungen.
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  • 5
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 31-36 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 6
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 13-16 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The Reactions between CuO and Fe resp. Fe3O4 in Solid State and their O2 and Water Vapor InfluencesThe reaction of CuO with Fe is detectable by means of the heating curves method at a temperature of at least 193°C. This reaction is activated by oxygen. Under these conditions it starts at lower temperatures but runs as if there would be no oxygen. Oxygen and water vapor are capable to increase suddenly the rate of reaction so that high temperatures appear. Under the same conditions but in absence of these two gases the reaction proceeds at a slow rate. CuO reacts upon Fe3O4 in a similar way. The heating curve of this reaction shows but no maximum.The formation of metallic copper and the local appearance of high temperatures are of considerable importance for the practice of steam plants. The formation of Fe2O3 by the reaction between CuO and Fe3O4 is just as well important for the determination of the type of corrosion.
    Notes: Die Umsetzung von CuO mit Fe ist nach der Methode der Erhitzungskurven schon ab 193° C nachweisbar. Diese Reaktion wird durch O2 angeregt, so daß sie dann bei niedrigeren Temperaturen beginnt und abläuft als bei Abwesenheit von Sauerstoff. O2 und H2O-Dampf sind in der Lage, die Reaktion plötzlich ablaufen zu lassen, so daß hohe Temperaturen entstehen, während sie bei Abwesenheit dieser beiden Gase unter gleichen Reaktionsbedingungen langsam verläuft. Ähnlich wie mit Fe reagiert CuO auch mit Fe3O4. Bei dieser Reaktion tritt aber kein Maximum in der Erhitzungskurve auf.In Bezug auf die Praxis im Dampfbetrieb ist die Entstehung von metallischem Kupfer von Bedeutung und die Tatsache, daß hohe örtliche Temperaturen auftreten können. Die Entstehung von Fe2O3 durch die Umsetzung zwischen CuO und Fe3O4 ist für die Beurteilung von Korrosionen ebenfalls von Bedeutung.
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  • 7
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 46-46 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 8
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 52-52 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 9
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 64-64 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 10
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 65-82 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: A Survey of the Methods and Specifications of Accelerated Tests in the Climatic Testing ProcedureThe methods of the accelerated tests for climatic testing, published in the German and foreign literature especially in the literature of standards, are reviewed in chart form. The material is classified according to the following points of view: 1conditioning prior to test,2constant climates (cold, dry, heat, high relative humidity),3special wearing (immersion, salt mist, mould growth, etc.),4alterating climate (changing of temperature, condensation),5Combined test cycles (alterating condensation in an atmosphere containing sulphur dioxide, light with additional effects, etc.).
    Notes: In Form von tabellarischen Übersichten werden die in der deutschen und ausländischen Literatur, insbesondere der Normenliteratur, beschriebenen Kurzbeanspruchungsverfahren im Rahmen der Klimaprüfung zusammenfassend dargestellt. Der Stoff ist nach folgenden Gesichtspunkten gegliedert: 1Klimabedingungen vor der Prüfung2Konstantklimate (Kälte, trockene Wärme, hohe Luftfeuchtigkeit.)3Sonderbeanspruchungen (Wasserlagerung, Salzsprühnebel, Schimmel usw.)4Wechselklima (Temperaturwechsel, Betauung usw.)5Kombinierte Prüfzyklen (Wechselbetauung in einer Atmosphäre, die Schwefeldioxyd enthält, Licht mit zusätzlichen Einflüssen usw).
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  • 11
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 127-137 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Material Secting Viewpoints for Contact Catalysts. Part II. Behavior and Properties of semiconducting CatalystsCondensed from the late literature non metal contact agents of the heterogenous catalysis are reviewed with respect to their semiconducting properties. By means of numerous works of different sources a causality between catalytic activity and electronic disturbances could be proved. In the discussion of some special types of reaction-decomposition of N2O, H2O2, O3, oxidation of CO, SO2, NH3, numerous reactions of hydrogenation, dehydrogenation, dehydration and some rearrangements and cleavages of organic molecules-two general kinds of reaction were created. Donator reactions forming kations of the reactants at a measurable rate on the surface of the contact during the course of reaction, are catalysed well by p-conducting agents. Acceptor reactions, characterized by a formation of anions in the velocity terminating intermediate reactions, are catalysed favorably by n-conductors.Electronic disturbances will always be ineffective if an innermolecular rearrangement, proceeding without any electron transition to or from the contact, becomes termitating velocity of reaction. By means of the semiconducting properties many causalities between the catalytic activity and the material properties of the contacts can be deduced for numerous contacts and reactions. The causalities, however, are of qualitative character and limited validity as the essential factors for catalytic reactions can only be demonstrated exactly with regard to the surface bonds of the activated complex (intermediate state).
    Notes: Nichtmetallische Kontaktmassen der heterogenen Katalyse werden vom Blickwinkel ihrer Halbleitereigenschaften aus in Form einer Zusammenfassung neuerer Literatur betrachtet. An Hand zahlreicher Arbeiten aus verschiedensten Quellen kann gezeigt werden, daß zwischen der katalytischen Wirksamkeit und der elektronischen Fehlordnung der Kontakte kausale Zusammenhänge bestehen. Bei der Besprechung einzelner Reaktionstypen - des N2O-Zerfalls, der CO-Oxydation, des H2O2-Zerfalls, des Ozonzerfalls, der SO2-Oxydation der NH3-Oxydation, zahlreicher Hydrierungs-, Dehydrierungs- und Dehydratisierungsreaktionen und einiger Umlagerung- und Spaltreaktionen organischer Molekeln-wird zwischen zwei Reaktionsarten unterschieden. DONATOR-Reaktionen, die während des Reaktions-Ablaufs mit meßbarer Geschwindigkeit Kationen der Reaktanten an der Katalysatoroberfläche ausbilden, werden durch p-leitende Katalysatoren gut katalysiert. AKZEPTOR-Reaktionen, gekennzeichnet durch eine Anionenausbildung im geschwindigkeitsbestimmenden Teilschritt der Reaktion, werden durch n-Leiter bevorzugt katalysiert.Ohne Einfluß ist die Fehlordnung immer dann, wenn Umlagerungen innerhalb der Molekeln, die ohne einen Elektronenübergang zum (oder vom) Katalysator verlaufen, geschwindigkeitsbestimmend werden.Mit Hilfe der Halbleitereigenschaften lassen sich für zahlreiche Kontakte und Reaktionen Zusammenhänge zwischen katalytischer Wirksamkeit und den Stoffeigenschaften des Kontaktes herleiten. Diese Zusammenhänge tragen jedoch nur qualitativen Charakter und sind nur beschränkt gültig, da die für die katalytische Reaktion wesentlichen Faktoren nur durch die Oberflächenbindung des aktivierten Komplexes (Zwischenzustandes) streng dargestellt werden können.
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  • 12
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 168-170 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 13
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 177-181 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 14
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 183-187 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 15
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 189-198 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Systematic Investigations to Test the Anticorrosive Efficacy of VPI upon a number of common MetalsIndustry pays increasing attention to Vapor Phase Inhibitor protection against corrosion. Thus far the application of this method was limited to steel products chiefly where excellent results could be expected in any case. In the course of this work the behavior of many common metals and alloys upon VPI were investigated systematically. The experiments made certain that the corrosive effect of atmospheric influences upon iron and non ferrous metals could be prevented. Herewith exact datas are available for the interested branches of industry so that they could make use of the numerous advantages of the VPI method.
    Notes: Der Korrosionsschutz mittels „Vapor Phase Inhibitor“ findet in der Industrie immer stärkere Beachtung. Bislang beschränkte sich die Anwendung dieses Verfahrens hauptsächlich auf Stahlerzeugnisse, bei denen in jedem Fall vorzügliche Ergebnisse zu erwarten sind. In der vorliegenden Arbeit wurden die Verhaltensweisen auch anderer viel verwendeter Metalle und Metallegierungen gegen VPI systematisch untersucht. Es wurde nachgewiesen, daß die korrodierende Wirkung atmosphärischer Einflüsse auch bei Eisen- und Nichteisenmetallen verhindert werden kann. Den einschlägigen Industrie-zweigen stehen damit exakte Unterlagen zur Verfügung, so daß nun auch dort die vielfachen Vorteile des VPI-Verfahrens nutzbringend angewendet werden können.
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 235-238 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 241-242 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 224-225 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 285-291 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 294-299 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 303-303 
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    Keywords: Chemistry ; Polymer and Materials Science
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 304-304 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. I 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 335-337 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 353-353 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 358-359 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 359-359 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 366-371 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 372-372 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 391-400 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 390-391 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: A Corrosion Resisting Separator Column Made of Monel for the Extraction of MercaptanThere is a treatise about a separator column for the regeneration of caustic soda methanol - mercaptan - solutions in the refinery of the Lobitos Oilfields Ltd., Ellesmere Port, which is using the Unisol process developed by the Universal Oil Products Company. The column was manufactured by the Metal Propellers Ltd. and is made of monel which meets all requirements of an corrosion resisting material.
    Notes: Es erfolgt die Beschreibung einer Abscheidesäle für die Regenerierung von Ätznatron-Methanol-Mercaptan-Lösungen in der Raffinerie der Lobitos Oilfields Ltd., Ellesmere Port, welche nach dem von der Universal Oil Products Company entwickelten Unisol-Prozess arbeitet. Die Säule wurde von der Metal Propellers Lt. aus Monel hergestellt. Es wird gezeigt, daß Monel in Korrosionstechnischer Hinsicht allen Anforderungen als Werkstoff gewachsen ist.
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 405-410 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 416-420 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 602-606 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. I 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 626-628 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Studies on the Corrosion of IronThere are two different modifications of iron oxides. The first is ferromagnetic having p-structure while the second is paramagnetic and has a α-structure. The formation of p-iron rust takes place in moist air. α-iron rust is formed by aqueous solutions of strong oxidising reagents or by organic agents. The magnetic behavior of the iron oxides allows to reconstruct the conditions of their formation. The results of the magnetic test comply with those of the X-ray fine structure investigations.
    Notes: Eisenoxyde existieren in zwei verschiedenen Modifikationen, einer ferromagnetischen mit γ-Struktur und einer paramagnetischen mit α-Struktur. Zur Bildung von γ-Eisenrost kommt es in feuchter Luft, zu der von α-Eisenrost in Wasser mit starken Oxydationsmitteln oder in organischen Mitteln. Das magnetische Verhalten der Eisenoxyde läßt auf die Art der Rostbildung zurückschließen. Das Ergebnis der Magnetprüfung deckt sich mit dem von Röntgen-Feinstruktur-Untersuchungen.
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 634-641 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: The Behaviour of Materials with Regards to FluorineIn the technical literature of the last five years, a large number of reports have been published about the behaviour of materials with regards to gaseous and liquid Fluorine. A summation and sifling of this scattered knowledge, leads to a general view of the present level of our knowledge about the handling of this aggressive material.Those metals which are not attacked by Fluorine, are nickel and its alloys with about 30% of copper, but also non-alloy steels, copper and aluminium are resistant to dry Fluorine. Carbon is the material used for electrodes in the electrolytical manufacture process of Fluorine. Oxydeceramic materials and some special acid resistant cements can be used to handle Fluorine. Glass and quartz are hardly attacked by the dry gas, even up to quite high temperatures. Organic materials are in general non-resistant.
    Notes: In der Fachliteratur der letzten fünf Jahre ist eine große Zahl von Mitteilungen über das Verhalten der Werkstoffe gegenüber gasförmigem und flüssigem Fluor veröffentlicht worden. Eine Zusammenfassung und Sichtung dieser zerstreut vorliegenden Erkenntnisse führt zu einem Überblick über den heutigen Stand unseres Wissens hinsichtlich der Handhabung dieses aggressiven Stoffes.Die gegen Fluor beständigsten Metalle sind Nickel und seine Legierungen mit etwa 30% Kupfer, aber auch unlegierter Stahl sowie Kupfer und Aluminium sind gegen trockenes Fluor resistant. Kohlenstoff wird als Elektrodenmaterial für die elektrolytische Fluor-Herstellung verwendet. Oxydkeramische Stoffe und einige säurebeständige Spezialkitte sind für die Handhabung von Fluor geeignet und auch Glas und Quarz werden von dem trockenen Gas bis zu recht hohen Temperaturen kaum angegriffen. Organische Werkstoffe sind im allgemeinen nicht beständig.
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 652-662 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: On the Behavior of Materials upon Sulfuric AcidA survey of the behavior of metal and non metal materials upon sulfuric acid of various concentrations is given. This is followed by a discussion of the influence of different additives in the sulfuric acid upon the corrosion of metal materials. Organic and inorganic additives which derive from the production and the application of the sulfuric acid are treated. The behavior of sulfuric acid in its mixtures of reacting components are discussed also.
    Notes: Zunächst wird ein Überblick über das Verhalten von metallischen und nichtmetallischen Werkstoffen gegenüber Schwefelsäure verschiedener Konzentration gegeben. Dann wird auf den Einfluß eingegangen, den die verschiedenen Beimengungen in der Schwefelsäure auf die Korrosion metallischer Werkstoffe haben. Es werden nicht nur nur die anorganischen und organischen Beimengungen behandelt, die bei der Herstellung und Verwendung von Schwefelsäure entstehen, sondern auch das Verhalten von Schwefelsäure in Mischung mit Stoffen, die in Gegenwart von Schwefelsäure umgesetzt werden.
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 662-669 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 670-676 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 680-682 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 697-697 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 697-697 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 704-704 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 705-708 
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    Description / Table of Contents: The results of the corrosion tests of cathodically protected iron specimens in aired and not aired soils were published in article I. This paper is a report on further corrosion tests on cathodically protected iron specimens in soils which have been carried out to explain the influence of the soil water to soil air ratio. The corrosion of the protected specimens decreased when the soil had reached its water saturation limit as it should have been expected. On basis of these investigations you could get quantitative and reliable datas of the effectiveness of the cathodic protection on the corrosion of the cathodic protection on the corrosion of the protected metal in dependence of the soil water to soil air ratio which characterizes the aggressiveness of soils. The results of these investigations could be used also to put up general corrosion charts for materials to be protected by cathodic protection.
    Notes: Nachdem über die Ergebnisse der mit kathodisch geschützten Eisenproben in belüfteten und unbelüfteten Böden durchgeführten Korrosionsversuche bereits berichtet wurde (Mitteilung I), wird in der vorliegenden Arbeit über weitere Korrosionsversuche berichtet, die mit kathodisch geschütztem Eisen im Erdreich zur Klärung des Einflusses des W-Bd-Verhältnisses durchgeführt wurden. Wie zu erwarten war, wurde der Angriff der geschützten Probe verringert, wenn der Boden die Sättigungsgrenze an Wasser erreicht hatte. Auf Grund der durchgeführten Versuche können quantitative, zuverlässige Aussagen über die Wirkung des kathodischen Schutzes auf den Korrosionsablauf des geschützten Metalls in Abhängigkeit vom W-Bd-Verhältniswert, der für die Aggressivität des Bodens maßgebend ist, gemacht und zur Aufstellung allgemeiner Korrosionsschemen für einen kathodisch zu schützenden Werkstoff herangezogen werden.
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 516-524 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 529-529 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 533-534 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. I 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 1-6 
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    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: On the Corrosion of Wine Bottle aps Made of Thinly Tinned Lead (Tinfoil Caps) and their TestingSeveral method have been developed for the testing of the thickness and porosity of the tin layers of the customary tinfoil caps. The tin layers of commercial wine bottles were found to be less than 0,001 mm and for a great part considerably porous.To test the resistance of the caps to corrosion, laboratory experiments and practical storage tests have been carried out with commercially capped bottles. Under certain conditions which might be met in practice the caps were corroded considerably, and in some cases they were deteriorated totally. The corrosion products are lead salts.
    Notes: Es wurden Verfahren für die Prüfung der Dicke und der Porigkeit der Zinnauflage auf den üblichen sogenannten “Stanniol” - Flaschenkapseln entwickelt. Kapseln von aus dem Handel bezogenen Weinflaschen waren fast stets unter 0,001 mm dick verzinnt und meist erheblich porig.Zur Prüfung der Korrosionsbeständigkeit der Kapseln wurden Laboratoriumsversuche mit Kapseln und praktische Lagerversuche mit handelsüblich verkapselten Flaschen ausgeführt. Unter gewissen Bedingungen, die in der Praxis durchaus vorkommen können, wurden die Kapseln unter Bildung von Bleisalzen erheblich korrodiert, in einigen Fällen sogar völlig zerfressen.
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 529-529 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 529-530 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 530-530 
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    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 544-544 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 24-26 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 17-23 
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    Description / Table of Contents: On the Anodic behavior of copper zinc alloys in sodium cyanide solutions IThe solubility of alloyed metal anodes is conditioned by the potential of the most not noble constituent of the alloy and the solubility of te cover primary formed on the surface of this constituent. Zinc and brass could be passivated much more easily tan copper. Both the constituents of the alloy react indepently just loke the pure metals. α + β bras is more active and can not be passivated as easily as α-brass. There are only gradual differences between the corrosion processes as well as between the reactions of anodic solution or passivation. The two metals dissolve one after the other and get passivated iin a process consisting of two steps. The voltage of the alloy shows the existence of a small depolarizing effect of teh metals upon one another.
    Notes: Die Löslichkeit von Legierungsanoden wird durch das Potential des unedelsten Bestandteiles der Legierung und die Löslichkeit der sich auf diesem Bestandteil primär ausbildenden Deckschicht bestimmt. Zink und Messing ist leichter zu passivieren als Kupfer. Beide Bestandteile reagieren in der Legierung unabhängig voneinander ähnlich wie die reinen Metalle, α + β-Messing ist aktiver und daher schwerer zu passivieren als α-Messing. Zwischen den Korrosionserscheinungen sowie den Vorgängen bei der anodischen Auflösung oder Passivierung der Legierungsanode bestehen nur graduelle Unterschiede. die beiden Metalle geben nacheinander in Lösung und werden in zwei Stufenprozessen passiv. Die Potentiale der Legierung zeigen eine geringe depolarisierende Wirkung der beiden Einzelmetalle aufeinander.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 69-73 
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    Description / Table of Contents: Polythylene plastic pipesPipes of soft and hart polythylene (Supralen soft and supralen hard) are gaining increasing application in constructions for transport of aggressive liquids and gases because of their good properties especially owing to their resistance to corrosion. So this paper presents a general and up to date survey of the commercial types and their dimensions and of the physical (mechanical, thermal, electric, hydraulic, acoustic, optical properties) and corrosion chemical behavior as well as te installation and fitting of polythylene pipes.
    Notes: Rohre aus Weich- und Hartpolyäthylen (Supralen, weich und Supralen, hart) finden infolge ihrer guten allgemeinen und spezifischen Eigenschaften, insbesondere ihres ausgezeichneten korrosionschemischen Verhaltens, zunehmende Verwendung in Anlagen zur Förderung aggressiver Flüssigkeiten und Gase. Im Hinblick darauf gibt der vorliegende Fortschrittsbericht einen zusammenfassenden und zeitgemäßen Überblick über Lieferarten und Dimensionierung, über das physikalische (mechanische, thermische, elektrische, hydraulische, akustische und optische Eigenschaften) und korrosionschemische Verhalten sowie über die Verlegung und Verbindung von Polyäthylen-Plastikrohren.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 74-76 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: On an method for removal of boiler scaleThe solid incrustations in boilers etc. are removed usually by application of certain acids at those places of the devices where the incrustations have been formed. It is wellknown that the aggressive effect of the acids upon cleaned metal surfaces could be prevented by an addition of certain substances with inhibitive effect which will say that these substances decrease or even prevent acid attacks. The peper contains a report on the inhibitive effect of the „Brindi“-resin and some theoretical conclusions drawn from the experimental results.
    Notes: Feste Steinbildungen in Kesseln usw. werden in neuerer Zeit bekanntlich da-durch beseitigt, daß sie in den Anlagen, in denen sie sich gebildet haben, durch bestimmte Säuren gelöst wurden. Es ist auch bekannt, daß die aggressive Wirkung der Säuren auf die Metallflächen, die unter den Steinbildungen liegen, wenn letztere aufgelöst sind, dadurch verhütet wird, daß der Säure bestimmte Stoffe zugesetzt werden, die als Inhibitoren wirken, d. h. den Säureangriff verringern oder u. U. ganz verhüten. Im vorliegenden Aufsatz ist die diesbezügliche Wirkung des „Brindiharzes“ als Inhibitor laboratoriumstechnisch festgestellt und versucht worden, aus den Ergebnissen einige theoretische Folgerungen zu ziehen.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 96-97 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 98-99 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 104-106 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 114-114 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 121-122 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 315-315 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. X 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 345-345 
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    Description / Table of Contents: Will lead colors become dispensable?Minium is a theoreically ideal protective pigment whose application may be entrusted without any danger even to little trained personnel. Protective covers are formed in the minimum film which prevent underrusting. Its electrochemical effect upon the metallic surface is independent of the chemical properties of the binder. Iron wash primers free from lead may be applied only under certain conditons. New directions confirm that lead colors are indispensable.
    Notes: Die Bleimennige ist ein „theoretisch ideales“ Schutzpigment, dessen anwendung man völlig gefahrlos auch weniger geschulten Hilfskräften überlassen kann.  -  In ihrem Film bilden sich Schutzschichten, die die Unterrostung verhindern.  -  Ihre elektrochemische Einwirkung auf den metallischen Untergrund ist von der chemischen Natur des Bindemittels unabhängig.  -  Bleifreie Eisengrundiermittel sind nur bedingt anwendbar.  -  Neue Betriebsvorschriften bestätigen die Unentbehrlichkeit der Bleifarben.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 357-360 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 369-370 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 114-114 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 117-117 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 122-123 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 125-131 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: The Vanal Process A new Way to Protection against CorrosionThe Paper contains a description of a new method to protect the surface of fireproof building-materials against untimely corrosion at high temperatures. The protective effect depends on surface tension. So this principle has been applied to protection against corrosion for the first time. Suitably arranged protective covers prevent any penetration of gases and slags. The technological and economical advantages of this process especially by application of silicon carbide are explained by means of practical examples.
    Notes: Es wird ein neues Verfahren beschrieben, durch das die Oberflächen feuerfester Baustoffe vor vorzeitiger Korrosion bei hohen Temperaturen geschützt werden. Die Wirkung beruht auf dem Gesetz der Oberflächenspannung, das hierfür erstmalig angewandt wird. Durch entsprechend ausgerichtete Schutzschichten wird das Eindringen von Gasen und Schlacken verhindert. An Hand von Beispielen as der Praxis wird der technische und wirtschaftliche Vorteil dieses Verfahrens besonders bei Siliciumcarbid erläutert.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 170-170 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 240-240 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 244-244 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 448-448 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 587-596 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Corrosion in High-Temperature-BoilersExperiences with corrosion of highly heat resisting steels in high temperature boilers in Germany are discussed by means of the working 600° boilers after 40 000 h of operation. Steam scalling in pure steam is very low. As soon as steam will be solid noticeably corrosive attacks will become dangerous. According to the high standard to water treatment such effects could be prevented so that damages caused by the water must be considered unusual.Damages caused by smoke occured as soon as the flying ashes contained alkali sulfates. The area of damage will be there where a eutectic mixture of sulfates could melt. There are some measures how to prevent this corrosion.Steels containing vanadium may not be used above 600°C as vanadium scaling might occur which was learnt in burning oils containing vanadium.
    Notes: Die Erfahrungen über das Korrosionsverhalten der hochwarmfesten Stähle in Hochtemperaturkesseln werden in Deutschland an Hand der im Betriebe befindliche 600°-Kessel nach rd. 40 000-stündiger Betriebszeit besprochen. Die Dampfzunderung in reinem Dampf ist gering. Gefahren treten erst auf, sobald der Dampf merkbar verunreinigt ist. dieses läß sich bei dem heutigen hohen Stande der Wasseraufbereitung vermeiden, so daß Korrosionsschäden von der Wasserseite her als ungewöhnlich zu betrachten sind.Schäden von der Rauchgasseite her sind bekannt geworden, sobald in der Flugasche Alkalisulfate vorkommen. Der Schadensbereich liegt in erster Linie dort, wo ein Eutektikum der Sulfate zu schmelzen vermag. Es werden Wege angegeben, wie diese Korrosion zu vermeiden ist.Vanadinhaltige Stäle scheiden für Temperaturen oberhalb 600° aus, da dann dieselbe Vanadinzunderung auftreten kann, welche von der Verfeuerung vanadinhaltiger Öle her bekannt ist.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 610-614 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 629-631 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 622-628 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 291-293 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 294-296 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 324-329 
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    Description / Table of Contents: Polyvinylchloride Plastik PipesPipes of polyvinylchloride (Supradur) are gaining increasing application in contructions for transport of aggressive liquids and gases because of their good properties especially owing to their resistance to corrosion. So this paper presents a general and up to date survey of the commercial types and their dimensions and of the physical and corrosion chemical behavior as well as the methods of installation and fitting of polyvinylchloride pipes.
    Notes: Rohre aus Polyvinylchlorid (Supradur) finden infolge ihrer guten allgemeinen und spezifischen Eigenschaften, insbesondere ihres ausgezeichneten Korrosionschemischen Verhaltens, zunehmende Verwendung in Anlagen zur Förderung aggressiver Flüssigkeiten und Gase. Im Hinblick darauf gibt der vorliegende Fortschrittsbericht einen zusammenfassenden und zeitgemäßen Überblick über Lieferarten und Dimensionierung, über das physikalische und korrosionschemische Verhalten sowie über die Verlegung und Verbindung von Polyvinylchlorid-Plastikrohren.
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