Degreasing treatment of pre-treatment in Dalian metal surface treatment:

Degreasing treatment of pre-treatment in Dalian metal surface treatment:

Dalian metal surface treatment is a very important process for metal surface treatment, including degreasing and phosphating. Excellent phosphating solution can only form a phosphating film on the surface of the workpiece after the oil pollution is completely removed. Cleaning agents, due to the residual oil pollution on the surface of the workpiece, not only severely prevent the growth of the phosphating film, but also affect the adhesion, drying function, decoration function, and corrosion resistance of the coating.

In the pre-treatment of metal surface treatment, commonly used degreasing agents include strong alkaline degreasing agents, weak alkaline degreasing agents, and organic solvent degreasing agents; There are various degreasing agents classified by temperature, including high temperature, medium temperature, and low temperature. Strong alkaline degreaser contains a lot of flake alkali, which is not easy to clean; The temperature of the degreaser should not be too high to prevent the workpiece from becoming dry before washing, resulting in rusting after phosphating.

 

The powder supply system of the electrostatic spraying equipment consists of a new powder bucket, a rotating screen, and a powder supply bucket. The powder coating is first added to a new powder bucket, and compressed air is passed through the micropores on the fluidization plate at the bottom of the new powder bucket to pre fluidized the powder. Then, it is transported to the rotary screen through a powder pump. The rotary screen separates oversized powder particles, and the remaining powder falls into the powder supply bucket. The powder is fluidized to a specified degree by the powder supply bucket and then supplied to the spray gun for spraying the workpiece through the powder pump and powder feeding tube.

During the assembly process, the procedures should be reasonable, and special attention should be paid to the sequence of assembly. Then, when operating, observe the surroundings and pay attention to the safety of nearby personnel to avoid personal injury. The placement location of the assembly should be selected accurately. If modifications are required, they must be reported to the relevant departments for approval. During the assembly process, workpieces that need to be repaired on site must be approved by the relevant departments before modifications can be made.

During the assembly process of Dalian metal surface treatment and sheet metal parts, it is strictly prohibited to place semi-finished products in areas with safety hazards. They should be placed in reliable and non moving places to avoid falling objects and causing injury to personnel. For heavy and large workpieces, there should be a dedicated person to command them when erecting, moving or laying them down to avoid accidents. After the assembled products are inspected and qualified, they can be shipped to buyers or stored in the warehouse.