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到用化学方法从钢表面清除把划痕或氧化层而获得洁净而光滑金属表面一个过程。 当钢锭或钢卷使用抛光处理时， 钢沉浸于稀释了的硫酸中加热到80oC左右的温度。 将增加金属抵抗腐蚀和蚀损斑的能力。 在酸浸以后， 由在石灰水沉浸到中性酸液体沉浸中随后进行一个清洗的过程。 为环保的原因爆破已经大量地代替了酸浸.
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