专利检索 ap:("DIPSOL CHEMICALS CO., LTD.") AND inv:"Takahiro Fujino" 第 1 页

1.

发明授权
Trivalent chromium chemical conversion treatment liquid for zinc or zinc alloy base and chemical conversion treatment method using the same 有权

公开(公告)号：US11987888B2

公开(公告)日：2024-05-21

申请号：US17888926

申请日：2022-08-16

申请人： DIPSOL CHEMICALS CO., LTD.

发明人： Ryouji Iwanaga , Manabu Inoue , Tomitaka Yamamoto , Takahiro Fujino

IPC分类号： C23C22/30 , C23C22/34 , C23C22/53 , C23C22/00

CPC分类号： C23C22/53 , C23C22/34 , C23C2222/10

摘要： An object is to provide a trivalent chromium chemical conversion treatment liquid for a zinc or zinc alloy base capable of forming an environmentally-friendly chemical conversion coating with high corrosion resistance. The present invention provides a hexavalent chromium-free trivalent chromium chemical conversion treatment liquid for zinc or zinc alloy, the liquid comprising trivalent chromium ions, zirconium ions, nitrate ions, and chain colloidal silica, in which the pH of the treatment liquid is 2.5 to 5.0.