Surface shading aluminum causes and Solutions - News - Zhejiang Guoyao Aluminum Co., Ltd
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Zhejiang Guoyao Aluminium Co., Ltd.

Address: China Yuantong Haiyan County in ZhejiangIndustrial Zone

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Surface shading aluminum causes and Solutions

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The main reason analysis

Because the press outlet air amount is not enough,resulting in aluminum contact swing bed under higher temperature, cooling speed contact site different from other locations, a coarse Mg2Si phase precipitation, in the anodic oxidation treatment after the site into the dark grey.

The solution

1, strengthen the cooling intensity, avoid the swing bedprofiles of the interval is too small, ensure the temperature gradient cooling;

2, conditional factory should adopt methods of spraywater and air combined, can completely eliminate dark spots.

(Editor: cocoa)

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