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Zinc corrosion in NH4Cl and effect of some organic inhibitors

✍ Scribed by M. Naja; N. Penazzi; G. Farnia; G. Sandonà

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
696 KB
Volume
38
Category
Article
ISSN
0013-4686

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✦ Synopsis

Abutrae-The corrosion of zinc in ammonium chloride. both pure and containing various organic compounds, has been studied by means of analytical and electrochemical methods as the determination of the zinc dissolved and the hydrogen evolved, 1(v) curve recording and impedance measurements. The results obtained in a potential region near the zinc corrosion potential showed that the cathodic reaction of hydrogen discharge does not fit a simple exponential law becausc the Tafel coefkient appears to be electrode potential dependent. The experimental tindings proved that only five of the 25 organic substances tested have been found to behave as zinc corrosion inhibitors (NDA, POELE, FORAFAC, TTH and TRITON in decreasing order of intluence).

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