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Effect of some substituted anilines‐formaldehyde polymers on mild steel corrosion in hydrochloric acid medium
Author(s) -
Shukla Sudhish Kumar,
Quraishi Mumtaz Ahmad
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.35668
Subject(s) - hydrochloric acid , tafel equation , formaldehyde , corrosion , aniline , metal , dielectric spectroscopy , polymer , materials science , polarization (electrochemistry) , copolymer , polymer chemistry , nuclear chemistry , inorganic chemistry , chemistry , electrochemistry , organic chemistry , metallurgy , composite material , electrode
The influence of linear copolymer of amines and formaldehyde namely poly(aniline‐formaldehyde) (Inh1), poly( o ‐toluidene‐formaldehyde) (Inh2), and poly( p ‐chloroaniline‐formaldehyde) (Inh3) on corrosion of mild steel in hydrochloric acid was evaluated by weight loss measurements, linear polarization, Tafel polarization, and electrochemical impedance spectroscopy. These polymers showed very high inhibition efficiency at very low concentrations. Results obtained showed that all inhibitors are mixed inhibitors and participate in reaction probably in the form of metal inhibitor complex on metal surface. Atomic force microscopic studies reveal that the surface of metal is quite unaffected after use of inhibitor in hydrochloric acid solution. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011