,申请号KR20010082359-传众专利搜索

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发明名称
摘要	PURPOSE: Provided is a chromium-free surface treatment composition for galvanized steel is provided, which does not harm to human and has good corrosion resistance. CONSTITUTION: A chromium-free surface treatment composition for galvanized steel comprises (a) at least one metal salts selected from the group consisting of colloidal silica, methoxy silane, polyvinyl alcohol, molybdate and vanadate, and (b) a balance of water, wherein colloidal silica, methoxy silane, polyvinyl alcohol are mixed in a weight ratio of 1:0.01 to 0.3:0.15 to 0.5; molybdate content in the chromium-free surface treatment composition is 0.1 to 0.8 wt.%; vanadate content in the chromium-free surface treatment composition is 0.02-0.5 wt.%.
申请公布号	KR100447599(B1)	申请公布日期	2004.09.07
申请号	KR20010082359	申请日期	2001.12.21
申请人		发明人
分类号	C23C22/82	主分类号	C23C22/82
代理机构		代理人
主权项
地址

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