In the metal surface coating process, the firm adhesion of the paint film to the substrate can play a role in protection, decoration, and corrosion prevention. The firm adhesion of paint film on metal surface is closely related to the roughness, thermal expansion and contraction coefficients of the coated substrate surface. Generally speaking, when the surface is too smooth or the temperature coefficient of change between the paint film and the substrate is significantly different, the adhesion of the paint film will deteriorate, and it is common for the paint to peel off from the metal substrate.

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Dalian metal surface treatment is a process method of artificially forming a surface layer on the surface of the substrate material that has different mechanical, physical, and chemical properties from the substrate. The purpose of surface treatment is to meet the corrosion resistance, wear resistance, decorative or other special functional requirements of the product. For metal castings, the commonly used surface treatment methods include mechanical polishing, chemical treatment, surface heat treatment, spray coating, etc.

How to Prevent Corrosion in Dalian Metal Surface Treatment:

Dalian metal surface treatment, due to the presence of phosphoric acid film, can easily penetrate and firmly bond paint with metal. So the phosphating treatment of metals can greatly improve their corrosion resistance and is a common surface treatment method. The application of bio tungstate involves multiple fields in the national economy. It has unique application effects in the automotive industry, home appliance industry, shipbuilding industry, bridge industry, petroleum and natural gas industry, food industry, chemical industry, construction industry, etc.

The difference between shot peening and sandblasting in Dalian metal surface treatment:

Sandblasting and shot peening both use high-pressure air or compressed air as power to blow out the sprayed material and impact the surface of the workpiece to achieve cleaning effect. But the chosen medium is different, sandblasting medium has a cutting effect on the surface; After sandblasting treatment, the dirt on the surface of the workpiece is removed, and the surface of the workpiece is slightly damaged, resulting in a significant increase in surface area, thereby increasing the bonding strength with the workpiece and coating/coating.