Effects of N-alkylation on anticorrosion performance of doped polyaniline/epoxy coating

被引：28
作者：
Liu, Suyun [1 ,2 ]
Liu, Li [1 ,3 ]
Li, Ying [1 ]
Wang, Fuhui [1 ,3 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
[3] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2020年 / 39卷
基金：
中国国家自然科学基金;
关键词：
Polyaniline; Coating; Modification; Al alloy; Anticorrosive property; CORROSION PROTECTION; FAILURE BEHAVIOR; EPOXY COATINGS; CONDUCTING POLYMERS; GRAPHENE OXIDE; CHAIN-LENGTH; SYSTEM; ALLOY; TEMPERATURE;
D O I：
10.1016/j.jmst.2019.06.012
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
N-alkylation of sulfosalicylic acid-doped polyaniline (PANI-SSA) was used to promote the anticorrosion performance of PANI-SSA/epoxy coating for 5083 Al alloy. PANI-SSA was modified with C5H11Br and C12H25Br in polar solvents IPA (isopropanol) and DMF (dimethylformamide), and then characterized by FTIR, XPS and sedimentation experiments. Results showed that alkanes were successfully linked onto the PANI-SSA chains. The compatibility between N-alkylated PANI-SSA and epoxy/xylene solution was improved. SEM results proved a better dispersion performance of N-alkylated PANI-SSA in epoxy coatings, with less holes and aggregations. Corrosion protection of the epoxy coatings incorporating PANI-SSA and N-alkylated PANI-SSA on 5083 Al alloy was studied by EIS and adhesion measurements in 3.5% NaCl solution. It turned out that the epoxy coating including C12H25Br-modified PANI-SSA in DMF has yielded the highest values of impedance modulus and best protective properties. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：48 / 55
页数：8
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