表面技术2017，Vol.46Issue(12)：192-198,7.DOI:10.16490/j.cnki.issn.1001-3660.2017.12.031
聚苯胺微乳液及其对水性防腐涂料防腐性能的影响
Polyaniline Microemulsion and Its Effects on Anticorrosion Property of Waterborne Anticorrosive Coatings
摘要
Abstract
The work aims to improve corrsion resistance of coatings on tinplate surface by preparing waterborne anticorro-sive paints with different acids-doped polyaniline (PANI) microemulsion. Properties of PANI were characterized with scanning electronic microscopy, Fourier transform infrared spectrometer and thermal gravimetric analyzer. Corrosion resistance of the waterborne anticorrosive coatings to polyaniline microemulsion was detected in the method of potentiodynamic polarization and by performing water resistance, salt spray resistance and salt water resistance experiments. Hardness and adhesion of the coat-ings were characterized by using pencil hardness and cross-cut mothed. The waterborne anticorrosive coatings made from phosphoric acid-doped PANI microemulsion and eigenstate PANI microemulsion had favorable protective effect on the tinplate. However, the waterborne anticorrosive coatings with hydrochloric acid-doped PANI microemulsion and without PANI micro-emulsion lost protective effect quickly during the process of immersion. Doped PANI led to passivation and shield of the tinplate surface while the eigenstate PANI had the effect of mechanical shield. As polyaniline microemulsion was incorporated into the waterborne anticorrosive paints, the hardness and adhesion of coatings showed no obvious degradation, indicating that polyani-line microemulsion was dispersed uniformly in the waterborne anticorrosive paints, which had little effect on properties of the coatings. The phosphoric acid-doped PANI microemulsion exhibits the best corrosion resistance when the PANI mass fraction was 0.3% in waterborne anticorrosive paints. Corrosion current Jcorrreaches 7.359×10-7A/cm2and corrosion potential Ecorr reaches -0.527 V.关键词
聚苯胺/水性防腐涂料/腐蚀防护/涂层表观形貌/微乳液聚合/动电位极化曲线/马口铁Key words
polyaniline/waterborne anticorrosive coating/corrosion prevention/coating apparent morphology/microemul-sion polymerization/potentiodynamic polarization curve/tinplate分类
矿业与冶金引用本文复制引用
李自军,刘胜林,康佳,王国刚,耿刚强..聚苯胺微乳液及其对水性防腐涂料防腐性能的影响[J].表面技术,2017,46(12):192-198,7.基金项目
国家电网公司科技指南项目(52467O160013) （52467O160013）
长安大学2016年大学生创新创业训练计划项目(201610710170) （201610710170）
长安大学教育教学改革研究项目(jgy16091) （jgy16091）
国家重点研发计划资助项目(2017YFB0702100)Supported by Guide Project of Science and Technology of State Grid Corporation of China (52467O160013), Training Program of In-ovation and Entrepreneurship for College Students of Chang'an University in 2016 (201610710170), Reform Research Project of Education and Teaching of Chang'an University (jgy16091), The National Key Research and Development Program of China (Grant No. 2017YFB0702100) （2017YFB0702100）
