1.前言往铜里添加至45%的锌的黄铜材料在切削加工性能及热加工性能上,由于兼具优良的机械性能及耐蚀性,故在各种产业范围内被广泛采用。以水龙头金属配件为代表的水道相关器具领域内,普通的黄铜材料具有高脱锌腐蚀敏感性。由于日本的水质是软水,水道器具主体主要是使用青铜铸件 1. Introduction Brass materials added to 45% zinc in copper are widely used in various industries due to their excellent machinability and corrosion resistance in terms of machinability and hot workability. In the field of water-related appliances represented by faucet metal fittings, ordinary brass materials have high dezincification corrosion sensitivity. As Japan’s water quality is soft water, the main waterway equipment is the use of bronze castings