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铝氧化处理方案，铝材清洗方法及清洗剂选择？
铝氧化有天然氧化，电化学氧化，化学氧化，碱性氧化，酸性氧化，阳极氧化六种，意思是铝及铝合金的氧化处理的方法。
铝及铝合金的氧化处理的方法主要有两类：
天然氧化
氧化膜较薄，厚度约为0.5～4微米,且多孔，质软，具有良好的吸附性，可作为有机涂层的底层，但其耐磨性和抗蚀性能均不如阳极氧化膜；
电化学氧化
氧化膜厚度约为5～20微米，有较高硬度，良好的耐热和绝缘性，抗蚀能力高于化学氧化膜，多孔，有很好的吸附能力。
化学氧化
铝及铝合金的化学氧化处理设备简单，操作方便，生产效率高，不消耗电能，适用范围广，不受零件大小和形状的限制。
铝及铝合金化学氧化的工艺按其溶液性质可分为碱性氧化法和酸性氧化法两大类。
按膜层性质可分为:氧化物膜、磷酸盐膜、络酸盐膜、铬酸－磷酸盐膜。
铝表面处理氧化的清洗
铝氧化前处理：
铝表面处理除油（脱脂）后的水冼：应该
具备两次水洗，铝氧化着色目
的是洗净产品残留的药液（或酸或碱，若除油剂中添加溶剂型乳化剂的，清洗更为重要。
）
或油污。
防止带入随后槽液中影响槽液的稳定性以及预防产品带有油污而产生不良品。
该两
次水洗可不作溢流使用，视工作量定时更换就行了。
碱蚀后的水洗：至少需要三次水洗。目的是洗掉经碱蚀后的铝材表面残留的黏稠的
碱蚀槽液膜，
由于比较难清洗，
建议笫一个水槽的水尽量减少更换次数，
保证一定温度和碱
度，这样有利于清洗产品。后面两水槽有条件的话，可增加搅拌效果更好。
该两次水洗可不
作溢流使用，视工作量定时更换就行了。
铝表面处理除油（脱脂）后的水冼：应该
MIL-A-8625
具备两次水洗，铝氧化着色目
的是洗净产品残留的药液（或酸或碱，若除油剂中添加溶剂型乳化剂的，清洗更为重要。
）
或油污。
防止带入随后槽液中影响槽液的稳定性以及预防产品带有油污而产生不良品。
该两
次水洗可不作溢流使用，视工作量定时更换就行了。
化学（电解）抛光后的水洗：具备两次水洗就行了，铝氧化着色目的洗掉铝材表面
黏滞的化抛药液，
建议*个水槽应保证带有一定温度以利于产品清洗。
第二个水槽可采用
循环流动水清洗效果更好。
（电解后需增加除膜工艺后再水洗两次）
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