重金属盐 meaning in Chinese

heavy metallic salt

The components of green phosphatizing without heavy metal and nitrite at room temperature and its corresponding technological parameters were defined by orthogonal test and comprehensive assessment , and the appearance , film wight and corrosion resistance of phosphating film were examined and analyzed
摘要通过正交试验和综合评定法，确定了一种不含重金属盐和亚硝酸盐和环保型常温磷化液的介质组成及相应的工艺参数，检测分析了磷化膜的外观、膜重和耐蚀性能。