表面技术2017，Vol.46Issue(12)：39-42,4.DOI:10.16490/j.cnki.issn.1001-3660.2017.12.008
高速电弧喷涂铝涂层在模拟深水下的腐蚀行为
Corrosion Behavior of High Velocity Arc Sprayed Al Coatings in Simulated Deep Water
摘要
Abstract
The work aims to study corrosion behavior of high velocity arc sprayed (HVAS) Al coatings. Corrosion behavior of HVAS Al coatings in different experimental conditions was analyzed in rust layer analysis methods including electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM) microstructure observation, X-ray diffractometer (XRD) and Fourier transform infrared spectroscopy (FTIR). The experimental results were studied comparatively. After 72 h immersion at 3 MPa, corrosion products on the Al coatings became loose powder-like, corrosion pits appeared and the Al coatings failed quickly. After 72 h immersion at atmosphere, the Al coatings were slightly corroded; after 720 h immersion at atmosphere, the Al coatings were completely covered by corrosion products. XRD analysis showed that corrosion products of the Al coatings were similar. FTIR analysis showed that pressure accelerated generation of corrosion products including basic aluminium chlo-ride hydrate Al9Cl6(OH)21·18H2O and Al5Cl3(OH)12·4H2O at 3 MPa. The corrosion products could not adhere to each other and would easily run off at high pressure, hence corrosion resistance of the coatings degraded quickly. Corrosion products of Al coatings at high pressure can not effectively block corrosive medium invading, hence corrosion resistance of Al coatings de-graded.关键词
高速电弧喷涂/铝涂层/腐蚀/深水/锈层分析Key words
high velocity arc spraying/Al coatings/corrosion/deep water/rust layer analysis分类
矿业与冶金引用本文复制引用
童辉,苏倩,娄亮杰,崔建军,高俊奎,蔡德军,安超,党文杰..高速电弧喷涂铝涂层在模拟深水下的腐蚀行为[J].表面技术,2017,46(12):39-42,4.基金项目
国家自然科学基金项目(51222510,51675533) （51222510,51675533）
中国石油集团工程技术研究院-哈尔滨工程大学防腐保温联合实验室项目(YJ2-16-03F)Supported by National Science Foundation of China (51222510, 51675533), Foundation of Anti-corrosion Insulation Joint Laboratory of CNPC Research Institute of Engineering Technology & Harbin Engineering University (YJ2-16-03F) （YJ2-16-03F）
