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COCO Zhou

Zhejiang Guoyao Aluminium Co., Ltd.

Address: Yuantong Industrial Zone Haiyan County in Zhejiang China

Mobile:+86-18957322071

Skype:huangzhouyingdidi

Web:www.guoyao-alu.com

Mail: info_shanghai2008@aliyun.com

The Hole And Around Why Aluminum Oxide Parts Is Difficult To Form Oxide Film

Aluminum oxide parts of the hole and its surrounding more difficult to form oxide film for the following two reasons:

(1), aluminum parts after washing laceration is not complete. Alkaline washing into the hole when the lye, such as failure to rinse, oxidized alkali solution will promote the flow of the cylinder, resulting in erosion around the hole around the oxide film.

(2), aluminum parts of the hole around the hole alive live. Aluminum tapping hole is very astringent, the operator often to Tu Qiao to lubricate, alkaline washing if the lack of emulsifier in the lye, live steep is very difficult to get rid of.


Solution: 

(1), in the alkaline wash before the first use of gasoline to wash again, alkali lotion should be added emulsifier;

(2), the workpiece should be washed after alkali washing.