Corrosion behavior of copper T2 and brass H62 in simulated Nansha marine atmosphere
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第9期
论文作者：Xiao Lu Yuwei Liu Miaoran Liu Zhenyao Wang
文章页码：1831 - 1839
摘 要：The accelerated corrosion behavior of copper T2 and brass H62 exposed in simulated Nansha marine atmosphere for different periods were investigated by weight loss method,SEM,XRD and potentiodynamic polarization measurements.The results indicate that copper T2 and brass H62 underwent severe corrosion,and the final corrosion rates at 32 days of exposure were 0.24 μm/d and 0.10 μm/d,respectively.Moreover,the overall corrosion type of copper T2 was uniform and the corrosion products Cu2 O and Cu2 Cl（OH）3 played a vital role in the corrosion rate of copper.While the dezincification corrosion with zinc preferential dissolution was obvious in brass H62.The predominant phases were the zinc-rich compounds Zn5（OH）8 Cl2·H2 O,Zn12（SO4）3 Cl3（OH）15·5 H2 O and NaZn4（SO4）Cl（OH）6·6 H2 O.There existed a large number of copper-rich holes with 20-50 μm depth beneath the corrosion product layer.
Xiao Lu1,2，Yuwei Liu1,2，Miaoran Liu2,3，Zhenyao Wang1,2
1. School of Materials Science and Engineering, University of Science and Technology of China2. Institute of Metal Research, Chinese Academy of Sciences3. University of Chinese Academy of Sciences
摘 要：The accelerated corrosion behavior of copper T2 and brass H62 exposed in simulated Nansha marine atmosphere for different periods were investigated by weight loss method,SEM,XRD and potentiodynamic polarization measurements.The results indicate that copper T2 and brass H62 underwent severe corrosion,and the final corrosion rates at 32 days of exposure were 0.24 μm/d and 0.10 μm/d,respectively.Moreover,the overall corrosion type of copper T2 was uniform and the corrosion products Cu2 O and Cu2 Cl（OH）3 played a vital role in the corrosion rate of copper.While the dezincification corrosion with zinc preferential dissolution was obvious in brass H62.The predominant phases were the zinc-rich compounds Zn5（OH）8 Cl2·H2 O,Zn12（SO4）3 Cl3（OH）15·5 H2 O and NaZn4（SO4）Cl（OH）6·6 H2 O.There existed a large number of copper-rich holes with 20-50 μm depth beneath the corrosion product layer.
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