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Change of mechanism of the hydrogen-electrode reaction with overpotential—II. hydrogen pressure equivalent to hydrogen overpotential and its relevance to the hydrogen embrittlement of metals

✍ Scribed by M. Enyo

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
383 KB
Volume
18
Category
Article
ISSN
0013-4686

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✦ Synopsis

Ahabnet

-Electrochemical aspects of the hydrogen embrittlement are discussed in terms of a possible mechanism change of the hydrogen-electrode reaction occurring at the surface of the metal. Hydrogen pressure equivalent to hydrogen over-potential is formulated for the dischargmmbination and the dischargeion + atom&sorption routes in general forms, including the cases with comparable magnitudes ofexchange cds of the constituent steps. The hydrogen pressure data observed by DeLuccia et aion iron in acidic solution are analysed. It is demonstrated that the data are well explained on the basis of the model that the hydrogen-electrode reaction on iron proceeds through the dischargecombination route with the exchange cd of the discharge step about one order of magnitude lower than that of the combination step.

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