Sheet metal processing The painting process of the sheet metal surface is of great significance to the sheet metal processing, and the surface painting has a protective effect on the sheet metal. The sheet metal case, cabinet, equipment shell, etc. will not be oxidized under the protection of the paint layer when exposed to the air, so they will not rust and have the function of waterproof and rust prevention.
Dongguan sheet metal processing
The painting process generally has four steps: first, treat the base course, then make a layer of primer, then add an intermediate coat, and finally make the surface course. Let's talk about the characteristics of each step.
1. Base course treatment. The base layer of sheet metal processing products needs to be derusted first, such as sand blasting, phosphating, etc.
2. Primer. Epoxy zinc rich primer is used for sheet metal processing. The purpose of this primer is to protect steel structures and steel products against rust. The coating film has good physical and chemical properties, easy construction, and good supporting performance. The main
ingredients are: epoxy resin, epoxy curing agent, zinc powder, antirust pigment, auxiliary agent and organic solvent, etc.
3. Intermediate paint. The sheet metal processing products are made of epoxy micaceous iron intermediate paint, which is used together with the epoxy zinc rich primer as the transition layer of the long-term anti-corrosion coating to enhance the sealing and anti-corrosion of the composite coating, and can also be used as the anti-corrosion and antirust primer. The film is strong and tenacious, with good adhesion and sealing, and good compatibility with the front and rear coatings. Its ingredients are: epoxy resin and curing agent, carrier iron oxide and antirust pigment.
4. Surface course. There are many kinds of paint that can be used for the surface course, such as epoxy asphalt finish, chlorinated rubber finish, acrylic and polyurethane finish, fluorocarbon finish, etc.