ISSN:
0933-5137
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
Notes:
The mechanism of anodic dissolution and hence of corrosion of W in alkaline solutions (NaOH, Na3PO4) has been investigated by measuring anodic Tafel lines by the galvanostatic technique, and calculating both the Tafel slope b and the effect of pH on anode potential as diagnostic criteria for the mechanism. The quasi-equilibrium principle of Kabanov, Burstein and Frumkin for all reactions preceding the rate-determining (rd) step has been used to calculate the concentration of intermediates as a function of potential. Two mechanisms have been tested with this principle:(i)the first involving the formation and dissolution of nonstoichiometric and stoichiometric surface oxides, and(ii)the second deals with the formation and dissolution of hydroxide species.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mawe.19820130503
