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A new sight of water‐soluble polyacrylamide modified by β‐cyclodextrin as corrosion inhibitor for X70 steel
Author(s) -
Yan Xueling,
Zou Changjun,
Qin Yibie
Publication year - 2014
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.201400063
Subject(s) - polyacrylamide , adsorption , scanning electron microscope , corrosion , chemisorption , materials science , langmuir adsorption model , polarization (electrochemistry) , corrosion inhibitor , langmuir , cyclodextrin , copolymer , chemical engineering , electrochemistry , nuclear chemistry , chemistry , composite material , polymer chemistry , polymer , chromatography , organic chemistry , electrode , engineering
The application of water‐soluble polyacrylamide modified by β‐cyclodextrin (ACDPAM) as a corrosion inhibitor on X70 steel in 0.5 M H 2 SO 4 solution has been evaluated using electrochemical measurements, weight loss, and scanning electron microscopy (SEM). The polarization curves results reveal that the copolymer acts as a mixed‐type inhibitor. The inhibition efficiency is found to increase by the increase in copolymer concentration and decreases by the rise in temperature, and it also exhibits effective inhibition even at a higher temperature. The adsorption of ACDPAM on X70 steel surface obeys the Langmuir adsorption isotherm and is governed by chemisorption. The SEM results demonstrate that X70 surface is protected by ACDPAM.