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Preparation of bi‐modified amphoteric oligochitosan derivatives and electrochemical evaluation on anticorrosion performances
Author(s) -
Zhang Huixin,
Wang Dongdong,
Jin Xiuhong,
Yang Tingru,
Shen Xiaoli
Publication year - 2015
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.41714
Subject(s) - dielectric spectroscopy , electrochemistry , adsorption , corrosion , materials science , metal , polarization (electrochemistry) , molecule , chemical engineering , polymer chemistry , nuclear chemistry , inorganic chemistry , chemistry , organic chemistry , composite material , metallurgy , electrode , engineering
Four bi‐modified amphoteric oligochitosan derivatives were synthesized chemically using quaternization, sulfonation, and carboxylation. The anticorrosion characteristics and mechanism of anticorrosion of these four oligochitosan derivatives on Q235 steel in 1.0 mol/L HCl solution were studied by potentiodynamic polarization and electrochemical impedance spectroscopy at constant temperature. The results suggest that these derivatives are hybrid corrosion inhibitors in which anodic inhibition predominates following the mechanism of adsorption film formation on the surface of the metal. They all have their own optimal dosages for anticorrosion application. Their inhibiting efficiencies are closely related to the nature and the amount of heteroatoms in their molecules. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41714.