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真空热蒸发镀膜的故障原因和处理方法
关键词：真空故障处理
1．镀铝层阳极氧化故障的排除
氧化层表面有点状痕迹
1预熔时电流过高或未加挡板。应适当降低预熔电流及加设挡板。
2蒸发电流过高。应适当降低
氧化层表面有流痕印迹
1镀件表面清洁不良。应加强清洁处理。
2擦拭镀件时蘸用乙醇过多。应减少乙醇的蘸用量。
3手指接触镀件表面后留下指印。应禁止手指接触镀件表面。
4唾液喷溅到镀件表面，使镀层表面产生圈状印迹。操作者应带上口罩
氧化层表面有灰点
1真空室底盘或室壁太脏。应使用乙醇擦拭干净。
2夹具太脏。应按工艺规程定期清洗夹具
氧化层表面发红
1阳极氧化电压偏低，氧化层厚度不够。应将电压提高到120V左右。
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