Corrosion kinetics and patina evolution of galvanized steel in a simulated coastal-industrial atmosphere
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第10期
论文作者：Chuang Qiao Lianfeng Shen Long Hao Xin Mu Junhua Dong Wei Ke Jing Liu Bo Liu
文章页码：2345 - 2356
摘 要：The corrosion kinetics and patina（corrosion products） layer evolution of galvanized steel submitted to wet/dry cyclic corrosion test in a simulated coastal-industrial atmosphere was investigated. The results show that zinc coating has a greater corrosion rate during the initial period and a lower corrosion rate during the subsequent period, and the patina composition and structure can greatly affect the corrosion kinetics evolution of zinc coating. Moreover, Zn5（OH）6（CO3）2 and Zn4（OH）6 SO4 are identified as the main stable composition and exhibit an increasing relative amount; while Zn12（OH）15Cl3（SO4）3 cannot stably exist and diminish in the patina layer as the corrosion develops.
Chuang Qiao1,2，Lianfeng Shen1，Long Hao2，Xin Mu2，Junhua Dong2，Wei Ke2，Jing Liu3，Bo Liu2,4
1. College of Forestry, Henan Agricultural University2. Environmental Corrosion Centre of Materials, Institute of Metal Research, Chinese Academy of Sciences3. Electric Power Test and Research Institute, Guangzhou Power Supply Co.Ltd.(GZPS)4. School of Metallurgy, Northeastern University
摘 要：The corrosion kinetics and patina（corrosion products） layer evolution of galvanized steel submitted to wet/dry cyclic corrosion test in a simulated coastal-industrial atmosphere was investigated. The results show that zinc coating has a greater corrosion rate during the initial period and a lower corrosion rate during the subsequent period, and the patina composition and structure can greatly affect the corrosion kinetics evolution of zinc coating. Moreover, Zn5（OH）6（CO3）2 and Zn4（OH）6 SO4 are identified as the main stable composition and exhibit an increasing relative amount; while Zn12（OH）15Cl3（SO4）3 cannot stably exist and diminish in the patina layer as the corrosion develops.
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