| 发明名称 |
VERFAHREN ZUR CHEMISCHEN NACHBEHANDLUNG VON STAHLBLECHOBERFLAECHEN. |
| 摘要 |
The discoloured uncoated side of a single sided electrolytic Zn coated steel sheet is treated with an aq. pickling agent contg. a soluble hydroxycarbonic acid and a soluble peroxide cpd., pref. hydrogen peroxide. Pref. the hydroxycarbonic acid used has a hydroxyl gp. and carboxyl gp. attached to the same carbon atom. The acid is pref. citric acid and the pH of the pickling agent is 1-75, pref. 2-3.5.
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| 申请公布号 |
DE3871143(D1) |
申请公布日期 |
1992.06.17 |
| 申请号 |
DE19883871143 |
申请日期 |
1988.07.28 |
| 申请人 |
VOEST ALPINE STAHL |
发明人 |
KOESTERS KURT DIPL ING DR;ANDROSCH FRANZ M DIPL ING;PAESOLD DIETER DIPL ING DR |
| 分类号 |
C23G1/08;C25D5/02;(IPC1-7):C23G1/08 |
主分类号 |
C23G1/08 |
| 代理机构 |
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