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Yisheng: No. 39, Meidong Road, Wangdian Town, Xiuzhou District, Jiaxing City

Yixuan: Jiaxing Huapeng Locomotive Parts Co., Ltd. on the north side of Yufeng Road, Yuxin Town, Nanhu District, Jiaxing City

Common problems and solutions in the painting operation of hardware parts (2)

2021-07-19 10:18:33
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Due to the many procedures in the painting operation , there is a high probability of problems with the painted surface, usually due to improper handling of the putty layer and primer layer, insufficient control of the painting process, poor working environment, and deviation of coating composition.

If a problem is found during the painting process, you can stop the operation and take appropriate measures immediately. According to the problem, you can also deal with it after the painting process is over.

-Wet print or wax marks under the coating.

From the surface of the paint layer, you can see the outline of the contaminated area on the bottom layer, or the appearance of a variety of shapes without light spots.

reason:

①The surface of the bottom layer is not sufficiently cleaned before painting, such as grease or waxy substances are not sufficiently removed.

②The previous paint layer has not dried or the defects of the old paint layer have not been removed.

③ The previous spray paint layer is not compatible with the repainted spray paint layer.

Approach:

If the wet mark is obvious, please rub off the paint layer before applying.

-Watermark printing.

White or yellow corrosion-like spots appear on the surface of the paint layer.

reason.

① The paint layer is in contact with water droplets without sufficient drying, especially water with high mineral content. The water droplets mix with the solvent in the paint and penetrate into the paint surface, leaving water marks. Therefore, the painted surface should not come into contact with water after being painted, and should not be driven on rainy days.

②Even if it is a dry paint surface, it will leave water marks on the paint surface if it is often exposed to water droplets. Under the sunlight, the water droplets have the transmission focus function of a magnifying glass. After the water droplets are dried, the paint surface will leave a white or yellow corrosion outline.

③The painted surface is too thick, the drying time becomes longer, and the probability that the paint surface touches water drops and leaves water marks becomes higher.

④Silicon-containing abrasives are used on the paint surface not long after painting.

Approach:

If you suspect that there is thick wax on the paint surface, please clean the paint surface thoroughly with a solvent before grinding. Use a fine abrasive or a coarse abrasive to grind, depending on the depth of the watermark. In the case of particularly serious watermarks, after a few days of polishing, the watermarks will reappear, and the cleaning and polishing procedures are performed many times to fully remove the watermarks. When repeated grinding is not effective, use fine sandpaper to moisten the ground water mark area and paint again.



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Telephone: 86+0573-83361666     Mobile phone: 189-5739-8802

Mail box: huanghxb_119@sina.com

Yisheng: No. 39, Meidong Road, Wangdian Town, Xiuzhou District, Jiaxing City

Yixuan: Inside Jiaxing Huapeng Motorcycle Parts Co., Ltd. on the north side of Yufeng Road, Yuxin Town, Nanhu District, Jiaxing City


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