Surface treatment of sheet metal parts
Surface treatment of sheet metal parts can increase the service life of products in harsh environments, or to achieve specific surface effects or functions.
So the surface treatment of sheet metal parts is a very important part of the sheet metal processing process, it has the functions of preventing parts from rusting and beautifying the appearance of products.
Since the surface of some sheet metal materials does not have the ability to prevent rust and corrosion, effective surface treatment is very necessary.
Several common surface treatment methods for sheet metal are: brushed, sandblasting, baking varnish, powder spraying, electroplating, and anodizing.
1. Brushed
The main function is to beautify the appearance. Generally, the surface treatment method of brushed is considered for aluminum.
2. Sandblasting
The main function is to remove the dirt on the surface of the workpiece, increase the adhesion of the surface of the workpiece, and prepare for the subsequent surface treatment.
3. Paint
Through spraying, high-temperature baking, etc., a layer of paint of various colors is sprayed on the surface of the material to beautify the appearance and increase the corrosion resistance of the material. It is a commonly used surface treatment method (generally liquid baking paint and powder Two kinds of paint).
4. Electroplating
Through a chemical reaction, a layer of other metals is attached to the surface of the material to increase the corrosion resistance of the metal and achieve a certain beautification effect. It is a commonly used surface treatment method, such as: electrogalvanized, electroplated nickel, etc.
5. Anodizing
Oxidize the metal on the surface of the workpiece to form a dense protective film on the surface of the workpiece to increase the corrosion resistance of the workpiece. Generally, there are two ways of chemical oxidation and anodic oxidation.
The pretreatment of the surface of the sheet metal parts is mainly to remove oil, oxide scale, rust, etc., which prepares for the surface post-treatment; and the post-treatment is mainly spray (baking) paint, plastic spray and anti-rust coating, etc.
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