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Zinc-rich primers are particularly suitable for steel protection in highly corrosive environments. For example, steel structure bridges, marine engineering facilities, petrochemical equipment, etc., these facilities are exposed to corrosive environments such as moisture, salt spray and chemicals for a long time.

Metallic paints that do not require primers are: 1. Direct-to-Metal Paint (DTM) 2. Alkyd Paint 3. Epoxy Zinc-Rich Paint 4. Polyurethane Paint

If the budget is sufficient and long-term protection is required, zinc primer is the best choice. Otherwise, for some projects with medium protection requirements, oxidation primer is also a good economic choice.

In some industrial environments, chemicals such as acids, alkalis, and chemical solvents can corrode metals. If the primer does not have sufficient chemical corrosion resistance, the chemicals may penetrate through the coating to the metal surface, causing rust.

Zinc-rich primers are a type of coating rich in zinc powder that performs well in the field of corrosion protection due to its cathodic protection. Zinc powder forms an electrochemical reaction with steel in the coating, corroding before steel, thereby protecting the steel from corrosion.

Zinc-rich primer prevents steel corrosion through the anodic protection of zinc, which is an electrochemical protection. The epoxy primer forms a dense shielding layer to isolate moisture and oxygen and prevent the oxidation of the substrate, which is a physical shielding protection.

For steel structures that are exposed to high temperatures or for a long time outdoors: Choose inorganic zinc rich primer, which provides better weather resistance and high temperature resistance. For locations requiring high adhesion and chemical resistance: Choose organic zinc rich primer.

Before applying anti-rust primer, the metal surface must be thoroughly cleaned. This step includes removing rust, grease, dust and other contaminants on the surface. A clean metal surface can ensure good adhesion between the primer and the metal and enhance the anti-rust effect.

The best paint for metal: 1. Epoxy Paint, 2. Polyurethane Paint, 3. Acrylic Paint, 4. Chlorinated Rubber Paint, 5. Zinc-Rich Paint, 6. Powder Coating. Painting metal surfaces can not only provide beautiful decoration, but also effectively protect metals and extend their service life.