高耐蚀性镀硬铬工艺研究

Research on High Anti-corrosion Hard Chromium Plating Process

针对空客生产的A320机型合金钢零件镀硬铬层高耐腐蚀性的要求,研究了一种高耐蚀性镀硬铬工艺,所获得的镀铬层硬度为750～980HV,并且通过了750h的盐雾试验,满足空客技术要求。研究还发现,特殊的电镀硬铬工艺,尤其是镀铬后的HA油除氢、磨削等是提高硬铬镀层耐腐蚀性能的关键。该工艺目前已在工厂的批量生产中获得应用。

Based on the requirement of high anti-corrosion of Airbus A320 alloy steel parts hard chrome plating, the hard chromium plating process for low alloy steels was investigated. This achieved chromium layer had high hardness （750～980HV）, could pass 750 h salt spray test and meet the airbus technical requirement. It was also found that hy-drogen relief with HA oil and grinding procedures were the key points to improve its corrosion resistance. This high anti-corrosion hard chromium plating process has already been applied on serial production of Airbus A320 model.