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58问答库 > 铝件阳极氧化膜产生黑点是什么原因？

铝件阳极氧化膜产生黑点是什么原因？

2025-04-02 02:02:02

推荐回答（1个）

回答（1）：

摘　要：答：在用硫酸阳极氧化的电解液中某些杂质的存在对氧化膜质量影响很大。尤其是氯离子和硝酸根离子的影响更为严重，它们能在阳极（铝件）优先放电，破坏了氧化膜的正常生长。如Cl^-含量过高时，会使铝件产生穿透性腐蚀小孔，造成氧化膜形成大量的黑色斑点。

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