发明名称 |
HYDROGEN PEROXIDE SOLUTIONS |
摘要 |
It would be desirable to replace nitric acid based solutions for surface treating steels and like materials with a sulphuric acid based solution containing hydrogen peroxide, but such replacement solutions lose hydrogen peroxide rapidly through mainly iron-induced decomposition. A surface treatment solution that is based on sulphuric acid and hydrogen peroxide, but has improved stability, contains an effective amount in combination of hydrofluoric acid, a hydroxybenzoic acid and an N-alkoxyphenyl-acetamide. Preferably, the hydroxybenzoic acid is para-hydroxybenzoic acid and the N-alkoxyphenyl-acetamide is N-(4-ethoxyphenyl)-acetamide. It is preferable to employ a saturated solution of each of the two latter components, and this can be achieved practically and simply by adding the solid components in the shape of a block or blocks which maintain the saturated solution over an extended period of time. |
申请公布号 |
WO9105079(A1) |
申请公布日期 |
1991.04.18 |
申请号 |
WO1990GB01450 |
申请日期 |
1990.09.20 |
申请人 |
INTEROX CHEMICALS LIMITED |
发明人 |
MCDONOGH, COLIN, FREDERICK |
分类号 |
C23F1/28;C23F3/06;C23G1/08 |
主分类号 |
C23F1/28 |
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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