发明名称 |
Verfahren zum Beizen und Passivieren von rostfreiem Stahl ohne Verwendung von Salpetersäure. |
摘要 |
A process for pickling and passivating stainless steel using a bath of the following initial composition: H2SO4 at least 150 g/l Fe<3><+> at least 15 g/l HF at least 40 g/l stabilized H2O2 1-20 g/l non-ionic surfactants and acid attack inhibitors 1 g/l, into which an air flow and an H2O2 quantity of between 0.3 and 1 g/l per hour, controlled to maintain the bath Redox potential at >/= 350 mV, are fed in continuously. |
申请公布号 |
DE69114265(D1) |
申请公布日期 |
1995.12.07 |
申请号 |
DE1991614265 |
申请日期 |
1991.08.14 |
申请人 |
ITB S.R.L., MAILAND/MILANO, IT |
发明人 |
BIANCHI, MARCO, I-20121 MILAN, IT |
分类号 |
C23C22/34;C23G1/04;C23G1/08 |
主分类号 |
C23C22/34 |
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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