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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0475302 (1974-05-31) |
우선권정보 | JA-0063228 (1973-06-05); JA-0009630 (1974-01-22) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 7 인용 특허 : 0 |
An aqueous solution for treatment of metal surfaces which has a pH value greater than 7, and comprises no free inorganic acid and 0.1 to 10% by weight, estimated as Cr, of a chromium compound in which 5 to 40% of the initial quantity of Cr(VI) is reduced by a reaction with a trifunctional phenol.
An aqueous solution for treatment of metal surfaces which has a pH value greater than 7, and consists essentially of 0.01 to 10% by weight, estimated as Cr, of a chromium compound in which 5 to 40% of the initial quantity of Cr(VI) is reduced by reaction with a trifunctional phenol and which possess
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