发明名称 |
CAMADA DE CONVERSAO ISENTA DE CROMIO(VI), E PROCESSO PARA A SUA PRODUCAO |
摘要 |
A chromium(VI)-free, chromium(III)-containing and substantially coherent conversion layer on zinc or zinc alloys presenting, even in the absence of further components such as silicate, cerium, aluminum and borate, a corrosion protection of approx. 100 to 1000 h in the salt spray test according to DIN 50021 SS or ASTM B 117-73 until first attack according to DIN 50961 Chapter 10; being clear, transparent and substantially colorless and presenting multi-colored iridescence; having a layer thickness of approx. 100 nm to 1000 nm; and being hard, adhering well and being resistant to wiping. |
申请公布号 |
PT907762(E) |
申请公布日期 |
2002.04.29 |
申请号 |
PT19970925823T |
申请日期 |
1997.04.18 |
申请人 |
SURTEC PROD. SYST. OBERFLACHENBEHANDLUNG GMBH |
发明人 |
PREIKSCHAT, PATRICIA;ROLF JANSEN;HULSER, PETER |
分类号 |
B05D3/10;B05D7/14;C23C22/30;C23C22/53;(IPC1-7):C23C22/53 |
主分类号 |
B05D3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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