工程科学学报2017，Vol.39Issue(10)：1532-1539,8.DOI:10.13374/j.issn2095-9389.2017.10.011;
微弧氧化对7050铝合金腐蚀行为的影响
Microarc oxidation coatings and corrosion behavior of 7050 aluminum alloy
摘要
Abstract
Ceramic coatings were formed on 7050 aluminum alloy ( AA7050) by microarc oxidation ( MAO). Subsequently, scanning electron microscopy (SEM) and energy-dispersive spectrometry (EDS) were used to evaluate the microstructure of the coat-ings. The coatings consist of an outer porous layer made of Al2O3 and an inner dense layer made of sintered alumina and aluminum substrate. Furthermore, potentiodynamic polarization tests and electrochemical impedance spectroscopy ( EIS) were combined with slow strain rate tests (SSRT) to investigate the effect of microarc oxidation on the corrosion and stress corrosion cracking (SCC) of AA7050 in 3. 5% NaCl solution. The corrosion on the surface of AA7050 and the corrosion rate and SCC decrease owing to the coat-ings on AA7050.关键词
7050铝合金/微弧氧化/腐蚀/应力腐蚀开裂/陶瓷膜层Key words
7050 aluminum alloy/microarc oxidation/corrosion/stress corrosion cracking/ceramic coatings分类
矿业与冶金引用本文复制引用
庄俊杰,张晓燕,孙斌,宋仁国,李海..微弧氧化对7050铝合金腐蚀行为的影响[J].工程科学学报,2017,39(10):1532-1539,8.基金项目
国家自然科学基金资助项目(51371039) （51371039）
