铸造铜合金冲刷腐蚀及机理研究
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摘要
模拟海水环境,对硅黄铜进行了冲刷腐蚀模拟实验和电化学腐蚀实验,借助SEM与XRD等手段分析了腐蚀现象,研究冲刷腐蚀机理。结果表明:铸造铜合金在冲刷腐蚀过程中腐蚀产物与电化学腐蚀相同;在未形成完整的钝化膜之前,铜合金腐蚀速率快;海水冲刷作用使材料表面处于钝化膜不断破坏与形成的循环过程中。
A corrosion experiment and an electrochemical corrosion test were conducted for silicon brass in the simulated seawater conditions and the corrosion phenomena were investigated by SEM and XRD for exploring the mechanism of erosion corrosion. The results showed that the corrosion products after the erosion corrosion of the cast copper alloy were the same as that from the electrochemical corrosion. The corrosion of the copper alloy was faster before completely forming the passive film, and due to the continuous destruction of the passive film by the seawater erosion process, the surface remained in a cyclic process of destruction and formation of a passive film.
A corrosion experiment and an electrochemical corrosion test were conducted for silicon brass in the simulated seawater conditions and the corrosion phenomena were investigated by SEM and XRD for exploring the mechanism of erosion corrosion. The results showed that the corrosion products after the erosion corrosion of the cast copper alloy were the same as that from the electrochemical corrosion. The corrosion of the copper alloy was faster before completely forming the passive film, and due to the continuous destruction of the passive film by the seawater erosion process, the surface remained in a cyclic process of destruction and formation of a passive film.
引文
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[2]魏木孟,杨博均,刘洋洋,等.Cu-Ni合金管海水冲刷腐蚀研究现状及展望[J].中国腐蚀与防护学报,2016,36(6):513-521.
[3]杨家东.海水冷却系统中管线用铜合金的微生物腐蚀与防护研究[D].青岛:中国海洋大学材料科学与工程学院,2015.
[4]王志武,原素芳.黄铜HSn70-1A、HA177-2A的抗冲刷能力比较研究[J].中国腐蚀与防护学报,2005,25(3):179-182.
[5]罗小兵,钱江,苏航,等.海水流速对典型金属管材腐蚀行为的影响[J].腐蚀与防护,2015,36(6):555-559.
[6]孙飞龙,李晓刚,卢琳,等.铜合金在中国南海深海环境下的腐蚀行为研究[J].金属学报,2013,49(10):1211-1218.
[7]彭文静,金和喜,刘伟成.Zn元素对AP65镁阳极材料腐蚀速率的影响[J].矿冶工程,2015,35(3):131-134.
[8]胡加瑞,陈伟,李文波,等.7A04铝合金高压开关部件剥落腐蚀分析及解决措施[J].矿冶工程,2018(1):119-122.
[9]朱娟,张乔斌,陈宇,等.冲刷腐蚀的研究现状[J].中国腐蚀与防护学报,2014,34(3):199-210.
[10]Flores J F,Neville A,Kapur N,et al.An experimental study of the erosion-corrosion behavior of plasma transferred arc MMCs[J].Wear,2009,267(1-4):213-222.
[11]中南大学.动态腐蚀性能测试方法:中国,201810428346.X[P].2018.