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Hydrogen evolution during alloy

Cr(VI)] increase the rate by raising the potential of the alloy into the transpassive region, the converse applies in the acid (Fe2(S04)j test, since reduction of Fe to Fe during the test will result in a decrease in the redox potential and the whole sample will corrode with hydrogen evolution. [Pg.1039]

An attempt to measure the pzc of Pb + Na alloys has been reported by Kiseleva etal.m The system was studied in the context of the cathodic processes during hydrogen evolution that are believed to result in the incorporation of alkali metal atoms. [Pg.146]

A hydroxide suppression model first proposed by Dahms and Croll (2) explains anomalous codeposition behavior of zinc-iron group alloys. This explanation was later supported by a number of workers (3) who measured a rise in pH near the cathode surface during the deposition of Zn-Co alloy. In this model it was assumed that the Zn(OH)2 was formed during deposition as a consequence of hydrogen evolution, thus raising pH in the vicinity of the cathode. Zinc would deposit via the Zn(OH)2 layer, while cobalt deposition took place by discharge of Co2+ ions... [Pg.194]

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