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Copper corrosion inhibition by polyaspartic acid and imidazole
Author(s) -
Wang H. P.,
Wu Q.,
Li C. M.,
Gu N.
Publication year - 2013
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.201106261
Subject(s) - polyaspartic acid , copper , corrosion , dielectric spectroscopy , corrosion inhibitor , imidazole , electrochemistry , chemistry , cathodic protection , polarization (electrochemistry) , nuclear chemistry , inorganic chemistry , stereochemistry , electrode , organic chemistry , raw material
This work reveals the corrosion inhibition effect of polyaspartic acid (PASP) and imidazole (IM) on copper in 3 wt% aminosulfonic acid acting as mixed‐type inhibitor of predominant cathodic effect. Potentiodynamic polarization and electrochemical impedance spectroscopy work prove that at 30 °C, 1.0 g/L PASP alone gave the best inhibitory effect of 89.8%; the inhibition efficiency could reach up to 95.4% when combining PASP and IM at the same ratio in total of 1.0 g/L. The anti‐corrosion mechanism of PASP and IM on copper is proposed from the characteristic molecular structures of these two chemicals.