Blue PCBA with conformal coating by Hitech Circuits Co., Limited in Shenzhen China
Blue PCBA with conformal coating by Hitech Circuits Co., Limited in Shenzhen China
As a leading one-stop electronics manufacturing services provider in China, Hitech Circuits Co., Limited offers high quality, cost effective and quick turn PCB board products, Printed Circuit board, PCB assembly, electronics assembly manufacturing, electronic parts components sourcing services for your new products development.
With mature supply chain, talented design team, advanced manufacturing techniques and quality control systems, Hitech Circuits Co., Limited is able to provide one-stop electronics manufacturing services and solution for our customers to help them stand out in the marketplace.
Conformal coatings play a critical role in protecting today’s electronic components. And as electronic packages continue to become smaller and more complex, we will continue to deliver a full offering of ultra-thin electronics coatings that meet industry needs.
Three proof paint coating is a common process used to protect the surface of objects from factors such as water, dust, and corrosion. This article will provide a detailed introduction to the process flow of three proof paint coating.
preparation
Before applying the three-proof paint, preparation work needs to be done. Firstly, it is necessary to check whether the surface of the object to be coated is flat and free of impurities such as oil stains and dust. If necessary, cleaning and polishing treatment should be carried out. Secondly, it is necessary to choose suitable three proof paint coatings, and select coatings with waterproof, dustproof, anti-corrosion and other properties according to the environment and requirements of the object.
Primer coating
Primer coating is the first step in the application of three proof paint. The function of primer is to enhance the adhesion between the coating and the surface of the object, improve the adhesion and durability of the coating. Before applying the primer, it is necessary to stir it evenly and dilute it according to the coating requirements. Then, use a brush, roller coating, or spray coating to evenly apply the primer onto the surface of the object, paying attention to the uniform thickness of the coating.
Intermediate paint coating
The intermediate paint is the second step of the three-proof paint coating. The function of intermediate paint is to enhance the corrosion resistance and durability of the coating. Before applying intermediate paint, the primer should be completely dried, usually waiting for at least 24 hours for the primer to dry. Then, stir the intermediate paint evenly and dilute it according to the coating requirements. Similarly, apply the intermediate paint evenly on the surface of the object using a brush, roller coating, or spray coating to maintain a uniform thickness of the coating.
4、 Topcoat coating
The topcoat is the final step in the application of the three-proof paint. The function of topcoat is to protect the coating, enhance the aesthetics and durability of the surface of the object. Before applying the topcoat, the intermediate coat should be completely dried, usually waiting for at least 24 hours for the intermediate coat to dry. Then, stir the topcoat evenly and dilute it according to the coating requirements. Similarly, apply the topcoat evenly onto the surface of the object using a brush, coating, or spray coating to maintain a uniform thickness of the coating.
5、 Drying and curing
After completing the three-proof paint coating, the coating needs to be dried and cured. The drying time and curing time depend on the type of coating and the thickness of the coating, and usually require waiting for more than 24 hours. During the drying and curing process, the coating surface should be kept dry and ventilated to avoid moisture and pollution.
6、 Quality inspection
The final step is to conduct quality inspection. Quality inspection includes visual inspection and performance testing. The appearance inspection mainly checks whether the coating surface is uniform, free of bubbles, color difference and other issues. Performance testing mainly tests the waterproof performance, dustproof performance, and anti-corrosion performance of coatings. If the quality of the coating is not up to standard, it needs to be repaired or recoated.
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