低压电器用铆钉触头在潮湿大气中的腐蚀

SURFAE CORROSION ACTION IN DAMP AIR OF THE BIMETAL ELECTRICAL CONTACT RIVET HEAD USED IN LOW VOLTAGE ELECTRIC APPARATUS

研究了潮湿大气对低压电器用铆钉触头 (Ag -CdO/Cu)表面的腐蚀行为 .新生产的铆钉在潮湿的大气中存放一定时间 ,其触头表面受到大气腐蚀 ,表面生成 3μm左右呈现暗黄色或深蓝色的薄膜 .XPS分析表明 ,腐蚀产物由氯化物、氧化物及石墨态碳构成 ,增大了接触电阻 ,恶化了熔焊性能 。

Surface Corrosion in damp air of the bimetal electrical contact rivet head(Ag-CdO/Cu)used in low voltage electric apparatus was studied in this paper. The surface of new contacts was covered with a film about 3 μm thick because of corrosion after laid in damp air for 40 days. The film colour of which was yellow, dark yellow or dark blue instead of keeping silver. On XPS, results showed that the film consisted of carbon, chloride and oxides, which made contact resistance larger and weldability worse.