公开(公告)号：US3556869A

公开(公告)日：1971-01-19

申请号：US3556869D

申请日：1969-07-22

申请人： NIPPON STEEL CORP

发明人： OKADA HIDEYA ,  MATSUDA SHOZO ,  OHBU MISAO ,  TAMURA HIDEO

IPC分类号： C23C22/24 ,  C23F7/26

CPC分类号： C23C22/24

摘要： A METHOD IS PROVIDED FOR SURFACE TREATMENT OF ZINC METAL AND ZINC ALLOYS TO OBTAIN A PRODUCT OF EXCELLENT CORROSION RESISTANCE, PAINT ADHESION PROPERTIES AND APPEARANCE. ACCORDING TO THIS METHOD, THE ARTICLE HAVING THE SURFACE OF ZINC METAL AND ZINC ALLOYS, IS TREATED WITH AN AQUEOUS SOLUTION OF CHROMIC ACID AND COLLOIDAL SILICA.