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    • 7. 发明专利
    • Pickling method of metal
    • 金属的拾取方法
    • JPS5943884A
    • 1984-03-12
    • JP15267882
    • 1982-09-03
    • Nitto Chem Ind Co LtdTokai Denka Kogyo Kk
    • KAWABE YASUMASAKUSHIBE KAZUYOSHITAKAHASHI TERUOWAKABAYASHI KUNIO
    • C23G1/06
    • C23G1/061
    • PURPOSE:To prevent corrosion of a ground metal of a boiler etc. at pickling, by adding N,N-dialkylhydroxylamine compounds to inorg. or org. acid for pickling and removing scales formed and deposited to the boiler. CONSTITUTION:Upon dissolving and removing scales of iron oxides such as Fe2O3, Fe3O4 formed and deposited to a heating surface of a boiler etc. by inorg. acid such as hydrochloric or sulfuric acid and/or org. acid such as citric or tartaric acid, about 0.1-1% N,N-dialkylhydroxylamine expressed by the general formula ( I ) such as N,N-diethylhydroxylamine, or its water-soluble compound is added and incorporated to prevent corrosion of a ground metal of the boiler by these acids. Ferric ion in the pickling liq. is reduced to ferrous ion having no corrosiveness, and the ground metal of the boiler is not corroded by the pickling liquid.
    • 目的:为了防止在酸洗时对锅炉等地面金属的腐蚀,通过向Inorg加入N,N-二烷基羟胺化合物。 或组织。 用于酸洗和去除形成并沉积到锅炉的垢。 构成:通过inorg将氧化铁,如Fe 2 O 3,Fe 3 O 4等形成并沉积到锅炉的加热面上进行溶解除去。 酸如盐酸或硫酸和/或组织。 加入酸,如柠檬酸或酒石酸,约0.1-1%的N,N-二烷基羟胺,由通式(I)表示,如N,N-二乙基羟胺或其水溶性化合物,并加入其中以防止地面腐蚀 这些酸的锅炉的金属。 酸洗中的铁离子 被还原成没有腐蚀性的亚铁离子,并且锅炉的研磨金属不被酸洗液腐蚀。