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    • 3. 发明授权
    • Descaling method for steel
    • 钢的脱硫方法
    • US3715236A
    • 1973-02-06
    • US3715236D
    • 1970-10-08
    • MITSUBISHI HEAVY IND LTD
    • FUKUI SMIYAKE MOKUMOTO MYAMAZAKI TYAMAMOTO M
    • C23G1/19C23G1/20
    • C23G1/19
    • Chromium-containing steel is descaled by wetting the surface of the steel after annealing and while still hot with a mixed aqueous solution of caustic soda and/or caustic potash containing at least one alkali metal salt capable of forming caustic soda or caustic potash by hydrolysis or with an aqueous solution of two or more alkali metal salts which are capable of forming caustic soda or caustic potash by hydrolysis. The water of the solution is evaporated by the retained heat of the steel and the mixture of alkali metal salts is retained on the surface of the steel in an oxygen-containing atmosphere for a period sufficient to convert the scale components into water- or acid-soluble materials.
    • 含铬钢通过在退火之后润湿钢的表面,同时用含有能够通过水解形成苛性钠或苛性碱的至少一种碱金属盐的苛性钠和/或苛性钾的混合水溶液进行除垢,或 与两种或更多种能够通过水解形成苛性钠或苛性钾的碱金属盐的水溶液。 溶液的水通过钢的保留热量蒸发,碱金属盐的混合物在含氧气氛中保持在钢的表面上足以将氧化皮成分转化成水或酸的溶液, 可溶性材料。