发明名称 Phosphate coating process and composition
摘要 This invention relates to a method of coating a metal surface with zinc and iron phosphate crystals for the purpose of improving corrosion resistance by means of a buffered zinc phosphate solution containing zinc dihydrogen phosphate and a monovalent, alkali metal salt of phosphate in proportions such that a fine, horizontal crystal structure consisting of tertiary zinc phosphate, zinc ferrous phosphate and other crystals of zinc ferrous phosphate is formed on the metal surface. The invention also relates to this composition.
申请公布号 US4330345(A) 申请公布日期 1982.05.18
申请号 US19800214537 申请日期 1980.12.08
申请人 CHEMFIL CORPORATION 发明人 MILES, DONALD L.;CHARLES, HARRY R.
分类号 C23C22/12;C23C22/13;C23C22/36;(IPC1-7):C23F7/10 主分类号 C23C22/12
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