Sheet metal processing surface treatment spray paint process
One: The base layer of sheet metal processing products should be derusted first. For example: sandblasting, phosphating, etc.
Two: The sheet metal processing product is made of epoxy zinc-rich primer, which is mainly used for anti-rust primer of steel structure and steel products. Its coating film has good physical and chemical properties, easy to construct, and good supporting performance. The main components are: ring Oxygen resin, epoxy curing agent, zinc powder, anti-rust pigments, additives and organic solvents, etc.
Three: Sheet metal processing products as epoxy mica intermediate paint: used in conjunction with epoxy zinc-rich primer, as a long-lasting anti-corrosion coating transition layer, its function is to enhance the sealing and anti-corrosion properties of the composite coating, and it can also be used Used as an anti-corrosion and anti-rust primer. The coating film is strong, has good adhesion and sealing, and has good compatibility with the front and rear coatings. Its ingredients are: epoxy resin and curing agent, carrier iron oxide and anti-rust pigments, etc. .
Four: The surface layer of sheet metal processing products. The surface layer can be used for epoxy asphalt topcoat, chlorinated rubber topcoat, acrylic and polyurethane topcoat, fluorocarbon topcoat, etc.
4. Plastic spraying (also called powder spraying)
It means that the powder is polarized and is uniformly attached to the surface of the product with the opposite polarity under the action of the electric field force. Plastic spraying characteristics: good wear resistance and corrosion resistance, thicker film, relatively coarse products suitable for cabinets and equipment, lower cost, and plastic powder can also be recycled. Common materials for this surface treatment process: cold-rolled sheet, hot-rolled sheet, etc.
Electrostatic powder spraying mainly polarizes the paint (powder) through the electrode, and then the object to be sprayed is charged with the opposite charge, and the powder is uniformly attached to the surface of the object under the action of the electric field force.
Through a chemical reaction, a layer of other metal 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: electro-galvanized, electro-nickel, etc. Mainly plated with colorful zinc, blue and white zinc, black zinc and chrome plating. Common materials for this surface treatment process: cold-rolled sheet, hot-rolled sheet, etc.