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Thiol compounds as corrosion inhibitors of carbon steel (XC 38) in sodium chloride medium
Author(s) -
Srhiri A.,
Etman M.,
Dabosi F.
Publication year - 1992
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.19920430806
Subject(s) - carbon steel , corrosion , cathodic protection , gravimetric analysis , chloride , sodium , anode , chemistry , thio , electrode , electrochemistry , rotating disk electrode , inorganic chemistry , materials science , organic chemistry , cyclic voltammetry
Abstract The study of thio compounds as inhibitors against the corrosion of a carbon steel (XC 38) in contact with 3% sodium chloride using a rotating disk electrode was performed. Stationary and transient measurements were carried out. Inhibition efficiency was estimated from both current‐potential characteristics and gravimetric measurements. With the most efficient inhibitor, orthoaminothiophenol (OATP), the inhibition mechanism was studied. Interpretation of the results implies the formation of a thick and compact inhibitor film. The OATP acts by considerably reducing the active area without modifying the mechanism of anodic and cathodic processes.