| 配方类型： |
METALS AND THEIR TREATMENT |
| 配方说明： |
Removing Nickel Oxide Scale |
| 配制方法： |
Prior to the sulfuric acid pickle, the scale may be loosened by immersion in a hot solution of 12 oz/gal each of potassium permanganate and caustic soda, or by a warm solution of 1 part muriatic acid and 2 parts water. |
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