户外高压隔离开关用银石墨复合镀层的耐蚀性和抗硫性能
Corrosion Resistance and Sulfur Resistance of Silver-Graphite Composite Coating for Outdoor High-Voltage Isolation Switch
摘 要
使用电沉积法在纯铜基体上制备了银镀层与银石墨复合镀层, 采用中性盐雾(240 h)和抗硫化物变色试验(0.5 h)研究了银镀层与复合镀层的耐蚀性及抗硫性能。研究表明: 复合镀层表面未出现腐蚀点与腐蚀坑, 按GB/T 6461-2002, 其耐蚀性达到中性盐雾试验10级标准；复合镀层在1 mol/L H2SO4溶液中的耐蚀性与银镀层相比略有降低；抗硫试验前后, 复合镀层中的银均无明显的色泽变化, 其抗硫性能优于某国产触头镀层与Siemens触头镀层的。
银石墨复合镀层
电沉积
耐蚀性
抗硫性
silver coating
silver-graphite composite coating
electro-deposition
corrosion resistance
sulfur resistance
Abstract
The silver and silver-graphite composite coatings on the substrate of copper were prepared by electro-deposition, respectively. Corrosion resistance and sulfide resistance of the silver and silver-graphite composite coatings were investigated by neutral salt spray test for 240 hours and anti-sulfide discoloration experiment for 0.5 hour. The results show that the corrosion pits on the surface of the silver-graphite composite coating did not appear, which indicated that the corrosion resistance of the silver-graphite composite coating reached the grade 10 of neutral salt spray test according to GB/T 6461-2002. In comparison with the silver coating, the corrosion resistance of the silver-graphite composite coating decreased slightly in 1 mol/L H2SO4 solution. The silver in the silver-graphite composite coating didn′t exhibit obvious color change during the sulfide resistance test. The composite coating had better sulfur resistance than the coatings on a domestic contacter and Siemens contacter.
中图分类号 TG172.3 DOI 10.11973/fsyfh-201606012
所属栏目 试验研究
基金项目 国网浙江省电力公司科技/信息化项目(B355DW140005); 江西省自然科学基金(20151BAB206017); 航空基金(2013ZF56022)
收稿日期 2015/5/6
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备注叶志国(1979-), 副教授, 博士, 从事材料电化学和工程材料研究,
引用该论文: CHEN Chuan,LU Chun-min,LANG Yun,YE Zhi-guo,CHEN Yi-bin,LI Guang-yu,MA Guang. Corrosion Resistance and Sulfur Resistance of Silver-Graphite Composite Coating for Outdoor High-Voltage Isolation Switch[J]. Corrosion & Protection, 2016, 37(6): 490
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参考文献
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【3】NAKATA M, OSAWA M, SHIKAZONO N, et al. Corrosion of Au-Ag alloys in NaHS and Na2S solutions[J]. Journal of the Surface Finishing Society of Japan, 1994, 45(1):98-102.
【4】岳永刚, 白志强, 赵墨林, 等. 采用导电滚动电触头的隔离开关过热故障分析[J]. 高压电器, 2008, 44(6):592-595.
【5】李盛, 王金海, 李海峰. 一起500 kV隔离开关过热分析及处理[J]. 华北电力技术, 2009(1):75-77.
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【7】李继光. 户外高压隔离开关常见故障原因及处理措施[J]. 电气电工, 2011(3):51-53.
【8】LIU H P, CAMES R W, GULLY J H. Effect of temperature on wear rate of homopolar pulse consolidated electrical brushes[J]. Wear, 1993, 167(l):41-47.
【9】RANKINEN G M, BERRY D F. New copper powders for electrical brushes and microbearings[J]. International Journal of Powder Metallurgy, 1994, 30(12):173-178.
【10】LEE J I, HOWARD S M, KELLAR J J, et al. Electrochemical interaction between silver and sulfur in sodium sulfide solutions[J]. Metallurgical and Material Transactions B, 2001, 32(5):895-901.
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