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Action of phenols on the corrosion of 3S aluminium in hydrochloric acid solutions
Author(s) -
Patel N. K.,
Makwana S. C.,
Patel K. C.
Publication year - 1973
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19730241106
Subject(s) - chemistry , phenols , phenol , hydrochloric acid , cresol , resorcinol , adsorption , pyrogallol , medicinal chemistry , aluminium , inorganic chemistry , corrosion , nuclear chemistry , organic chemistry
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.