- 专利标题: Metal pretreatment composition containing zirconium, copper, zinc, and nitrate and related coatings on metal substrates
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申请号: US13531666申请日: 2012-06-25
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公开(公告)号: US09970115B2公开(公告)日: 2018-05-15
- 发明人: Donald Vonk , Edis Kapic , Bruce Goodreau , Alvaro Bobadilla
- 申请人: Donald Vonk , Edis Kapic , Bruce Goodreau , Alvaro Bobadilla
- 申请人地址: DE Duesseldorf
- 专利权人: Henkel AG & Co. KGaA
- 当前专利权人: Henkel AG & Co. KGaA
- 当前专利权人地址: DE Duesseldorf
- 代理商 Mary K. Cameron
- 主分类号: C23C22/34
- IPC分类号: C23C22/34 ; C23C22/00
摘要:
A pretreatment composition for metal that provides enhanced corrosion resistance, enhanced paint adhesion and reduced chip damage to a wide variety of metal substrates. The pretreatment is also cleaner because it is based on zirconium rather than zinc phosphates. The pretreatment coating composition in use preferably comprises 50 to 300 parts per million (ppm) zirconium, 0 to 100 ppm of SiO2, 150-2000 ppm of total fluorine and 10-100 ppm of free fluorine, 150 to 10000 ppm of zinc and 10 to 10000 ppm of an oxidizing agent and has a pH of 3.0 to 5.0, preferably about 4.0. The coating composition can optionally include 0 to 50 ppm of copper. The suitable oxidizing agents can be selected from a large group.
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