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Action of phenols on the corrosion of 3S aluminium in hydrochloric acid solutions

✍ Scribed by N. K. Patel; S. C. Makwana; K. C. Patel

Publisher
John Wiley and Sons
Year
1973
Tongue
German
Weight
261 KB
Volume
24
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

The inhibiting effect of some phenols on the corrosion of iron in 0.5 N hydrochloric acid depends from the concentration and the constitution of the particular inhibitor. The effect decreases in the following order; p‐thiocresol > pyrogallol > resorcinol > phenol > p‐cresol > m‐cresol > o‐cresol. The low inhibiting power of the cresols appears to be due to the cresol appears to be due to the electron donating capacity of th CH~3~ groups and their interaction with OH groups which is an electron donator, too. The SH and OH groups appear to facilitate the adsorption on cathodic sites as do the π‐electrons of the aromatic annulus.

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