| 摘要 |
A composition and apparatus and method of using the composition for aqueous spray descaling or conditioning of scale or oxide on metal surface, especial ly stainless steel strip or the like, in one embodiment, althrough it can be us ed to descale or condition oxide or scale on other work pieces such as metal ba r, or even discrete objects. An aqueous solution having a base composition of a n alkali metal hydroxide, such as sodium hydroxide, potassium hydroxide, or a mixture of alkali metal hydroxides such as sodium hydroxide and potassium hydroxide is used. The aqueous solution may contain certain additives to improve the descaling performance of the salt. In one embodiment, the soluti on is used to condition the scale or surface oxide on a strip of stainless stee l. The strip of steel is at a temperature between the melting point of the alka li metal hydroxide in anhydrous form and a temperature at which the Leidenfrost effect appears. One or more nozzles is provided to spray the solution, and t he heated strip is passed by the nozzle or nozzles where the solution is spraye d on the surface or surfaces of the strip that have the scale or oxide. The invention also includes the apparatus and control thereof for the spraying o f the solution.
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