The Painting Method for Surface Processing of Stainless Steel
Stainless steel surface processing is a common technology used to add a decorative look to stainless steel and other alloyed products, as well as to increase resistance to corrosion and abrasion. Compared with other techniques such as electrolysis and coating, the painting method for surface processing of stainless steel has more advantages, such as high cost-effectiveness and low environmental pollution, and thus has become a commonly used technique. This paper mainly introduces the steps of painting method for surface processing of stainless steel.
First, surface cleaning. Before the stainless steel is painted, the surface of the product must be cleaned in order to ensure that the paint layer is attached firmly and evenly. Generally, the surface of stainless steel is degreased with an organic solvent to remove the oil, water, and dirt that are on it. After that, the surface of the product will be sanded and cleaned using a brass brush. In addition, mechanical blasting, electric blasting, chemical blasting, etc. can also be used for surface cleaning if necessary.
Second,priming. In order to make the paint grip the surface more firmly, it is necessary to use a primer before painting to fill the irregularities on the surface and increase the adhesion of the paint. Generally, an epoxy primer or a polyurethane primer is used, but it should be noted that the primer should be compatible with the topcoat and have the same chemical and physical properties, in order to avoid the paint peeling off easily.
Third, painting.After the primer is dry, the painting can be performed. When painting, you must use a brush specially designed for stainless steel and use a thin coat of paint. It is better to use an electric paint sprayer for more uniform and efficient painting, as it will be much easier to produce an even and attractive color. The paint must also be able to resist corrosion and abrasion and be compatible with the primer.
Finally, curing. After the paint is applied, it needs to be cured for 8~10 hours at temperature of 200-230℃ in order to ensure the paint forming a firm film. This treatment can help to form a strong paint film and better adhesion between the paint and substrate.
In conclusion, the painting method for surface processing of stainless steel involves several steps, including surface cleaning, priming, painting, and curing. Simple, efficient, and low cost make this technique suitable for many applications. Therefore, if you want to perform surface processing on stainless steel, the painting method is an excellent choice.
