纳米镍涂层对铜合金耐腐蚀性能的影响
Effect of Nanocrystalline Nickel Coating on Corrosion Resistance of Copper Alloys
摘 要
通过电镀在铜合金表面获得晶粒尺寸分别为10~20 nm和0.2~0.3 μm的镍涂层,采用透射电子显微镜对涂层的微观结构进行表征,采用电化学方法和盐雾试验测试了涂层的耐蚀性。结果表明:纳米镍涂层的腐蚀电位较高,试样表面形成了致密的Ni(OH)2钝化膜,能有效隔绝腐蚀介质,耐腐蚀性能最好;经过216 h盐雾试验后,纳米镍涂层表面仍可观察到镜面光泽,微米镍涂层表面出现了明显的腐蚀产物堆积,这进一步证明纳米镍涂层的耐蚀性更好。
电镀
腐蚀
纳米镍涂层
电化学测试
盐雾试验
copper alloy
electrodeposition
corrosion
nano-nickel coating
electrochemical test
salt spray test
Abstract
Nickel coatings were obtained on the surface of copper alloy by electroplating, and the grain size of the coating was 10-20 nm and 0.2-0.3 μm, respectively. The microstructure of the coatings were characterized by transmission electron microscope, and the corrosion resistance of the coating was tested by electrochemical method and salt spray test. The results showed that the corrosion potential of the nano nickel coating was high, and a dense Ni(OH)2 passive film was formed on the surface of the sample, which could effectively isolate the corrosion medium and had good corrosion resistance. After 216 h salt spray test, mirror luster could also be obserbed on the surface of the nano nickel coating, and the surface of micro nickel coating had corrosion product accumulation, which further verified that the corrosion resistance of the nano nickel coating was relatively good.
中图分类号 TG178 DOI 10.11973/fsyfh-202301005
所属栏目 试验研究
基金项目
收稿日期 2021/1/28
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联系人作者罗芹(luoq1880@163.com)
引用该论文: LUO Qin. Effect of Nanocrystalline Nickel Coating on Corrosion Resistance of Copper Alloys[J]. Corrosion & Protection, 2023, 44(1): 25
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参考文献
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【8】KARAMIS M B,SERT H. The role of PVD TiN coating in wear behaviour of aluminium extrusion die[J]. Wear,1998,217(1):46-55.
【9】WANG S L,CHENG J C,YI S H,et al. Corrosion resistance of Fe-based amorphous metallic matrix coating fabricated by HVOF thermal spraying[J]. Transactions of Nonferrous Metals Society of China,2014,24(1):146-151.
【10】ZAMANZAD-GHAVIDEL M R,RAEISSI R,SAATCHI A. The effect of surface morphology on pitting corrosion resistance of Ni nanocrystalline coatings[J]. Materials Letters,2009,63(21):1807-1809.
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【16】ORAZEM M E,TRIBOLLET B. Electrochemical Impedance Spectroscopy[M]. Hoboken,NJ,USA:John Wiley & Sons,Inc.,2008.
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