Why does car paint come off
The phenomenon of car paint falling mainly refers to the loss of adhesion to the substrate due to paint cracking after car spraying, and the phenomenon of small or large area detachment of the coating film under external force, which is called falling. Dropping can also be divided into three types: small piece falling, large piece falling, and large piece falling. So, what is the reason for the phenomenon of car paint falling off? What is the solution? Next, let's learn more about it with the editor!
Reason:
1. Excessive lubrication on the surface of the coating can cause the paint film to fall off.
2. The surface treatment of the substrate before painting construction is not good, with oil stains, wax, moisture, dust, chemicals, etc., or the surface treatment is not carried out in a timely manner.
3. Spraying topcoat or varnish before the bottom layer is completely dry can easily cause falling.
4. Improper selection of primer, high hardness of primer, and slippery appearance can lead to the loss of adhesion between primer and topcoat, resulting in the phenomenon of falling off.
Solution:
1. Before construction, the surface of the substrate should be thoroughly treated with appropriate methods and any dirt left during the pre-treatment should be removed.
2. Primer should be selected with good adhesion and wetting properties.
3. If the surface of the substrate is too lubricated, appropriate treatment measures should be taken before construction.
4. Wait until the base coat is completely dry before spraying the topcoat and topcoat varnish.
5. Strictly follow the construction data provided by the paint manufacturer for construction.
Article source: Automotive repair paint http://www.m.lnnet.com.cn
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