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US5536336A Method of phosphating metal surfaces and treatment solution 失效
磷化金属表面和处理液的方法

Method of phosphating metal surfaces and treatment solution
摘要:
A method of chemically converting metal surfaces of a combination of iron steel and/or galvanized steel and an aluminum alloy with a phosphate solution satisfying the following conditions:2.0.ltoreq.Na ion+K ion.ltoreq.15.0 (g/l)1.0.ltoreq.Mn ion+Ni ion.ltoreq.5.0 (g/l)1.6-0.02T.ltoreq.Zn ion.ltoreq.2.5-0.02T (g/l)3.2T.sup.-1 .ltoreq.free F ion.ltoreq.8.0T.sup.-1 (g/l)0.014T-0.02(free F ion).sup.-1 .ltoreq.free acidity.ltoreq.0.027T-0.02(free F ion ).sup.-1 (g/l)where T represents a treatment solution temperature (.degree. C.).
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