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Corrosion Inhibition of mild steel in aqueous solution containing H 2 S by some naturally occurring substances
Author(s) -
Barakat Y. F.,
Hassan A. M.,
Baraka A. M.
Publication year - 1998
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.19980290709
Subject(s) - coriandrum , aqueous solution , corrosion , chemistry , nuclear chemistry , euphorbiaceae , coumarin , sativum , metallurgy , materials science , botany , organic chemistry , biology
The corrosion inhibition of mild steel by some naturally occuring substance was evaluated in absence and presence of 600 and 1200 mg H 2 S/l in 3% NaCl aqueous solution and pH of 3 and temperature of 25 °C. These naturally occurring substance included the water extracts, coumarines and fatty matters extracts of some Egyptian plants. These plants included: (1) Nigella Sativa (Family Ranunculacease) (Extract (1), 2) Coriandrum Sativum (Family Umbelliferea) (Extract II), 3) Ricinus communis (Family Euphorbiaceae) (Extract III). The galvanostatic anodic and cathodic polarization measurements were used for studying the corrosion behavior of mild steel and evaluation of the percentage inhibition of the undertesting extracts of these three plants and also preparation of fatty matters and coumarin fractions were mentioned.