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 sol...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.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.51622106 and 51871049).
文摘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.
