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发明授权
CN101423948B ZA镁合金化学前处理方法 失效 - 权利终止 转让

ZA镁合金化学前处理方法
摘要：
本发明提供了ZA镁合金(高锌含铝镁合金)化学前处理方法，该方法包括将所述ZA镁合金与脱脂液接触进行脱脂和将所述ZA镁合金与酸洗液接触进行酸洗，其中，所述酸洗液为含有无机强酸和具有螯合作用的有机酸的水溶液，该方法还包括在酸洗后将所述ZA镁合金与除斑液接触进行除斑，其中，所述除斑液为含有强碱性化合物和具有螯合作用的有机酸盐的水溶液，所述除斑液的pH值为12-14。利用本发明提供的ZA镁合金化学前处理方法对ZA镁合金处理后，能够使ZA镁合金得到不带黑斑呈均匀白色的光洁表面。
摘要（英）：

The invention provides a chemical pretreatment method for ZA magnesium alloy (zinc-aluminum magnesium alloy). The method comprises the following steps: the ZA magnesium alloy is contacted with a degreaser to be degreased; then the ZA magnesium alloy is contacted with a pickling solution to be pickled, wherein the pickling solution is an aqueous solution containing an inorganic strong acid and a complexing organic acid; and the ZA magnesium alloy is contacted with a clearing bath to be cleared, wherein the clearing bath is an aqueous solution containing a strong alkaline compound and a complexing organic aid salt and the pH value of the clearing bath is between 12 and 14. ZA magnesium alloy treated by the chemical pretreatment method for ZA magnesium alloy has a smooth and clear surface which is evenly white without dark spots.

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