In the metal surface coating process, the firm adhesion of the paint film to the substrate can play a role in protection, decoration, and corrosion prevention. The firm adhesion of paint film on metal surface is closely related to the roughness, thermal expansion and contraction coefficients of the coated substrate surface. Generally speaking, when the surface is too smooth or the temperature coefficient of change between the paint film and the substrate is significantly different, the adhesion of the paint film will deteriorate, and it is common for the paint to peel off from the metal substrate.
The main difference between spray painting and spray painting is that the spray painting process is slightly more complex, but the quality is better, and the service life of the finished product is much longer than that of spray painting. Strong surface adhesion, not easy to burn, can protect metal surfaces for a long time. Spraying is safer and more environmentally friendly. However, paint contains a certain amount of organic solvents, which are easily volatile in the air and produce exhaust gases. It has poor environmental protection and a higher risk of fire than spray painting.
Dalian Metal Plastic Spray Painting Steps
1. Remove rust
Rust not only makes the metal surface rough, but over time it will also cause paint to peel off. You can use kitchen ingredients such as vinegar and baking soda, or purchase rust remover from a hardware store to remove rust from the target metal.
Soak the metal in vinegar or coat it with a paste made of baking soda mixed with water, let it stand for several hours and wait for the rust to decompose.
After soaking, you can use tools such as steel wool or a toothbrush to clean the remaining rust layer.
2. Rubbing the metal surface to make it rough
Use sandpaper to remove the gloss on the metal for easier adhesion of the paint. Metal should lose its luster and feel rough to the touch.
3. Clean metal
After rust removal and sanding with sandpaper, remember to thoroughly wipe the metal with a damp cloth.
Apply primer to the metal. Apply a uniform layer of primer to the entire metal surface. How to spray paint metal
4. Spray paint onto the metal surface
Please follow the same painting technique as described earlier and apply a uniform layer of paint to the metal. If you want, you can also spray multiple layers of paint.
Metallic paint, also known as metallic glitter paint, is a very popular type of automotive topcoat nowadays. Metallic paint is made by adding aluminum powder on top of ordinary paint, and the light shining on the aluminum particles is reflected by the aluminum particles through the air film, making it look very bright. Moreover, the hardness of metallic paint is much higher than that of ordinary paint, and it is difficult for ordinary objects to scrape it off. Relatively speaking, the price may be higher than that of ordinary paint. However, considering the overall cost-effectiveness, it is usually recommended to use metallic paint.
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