Epoxy zinc-rich primer is based on ** as the main anti-rust pigment, epoxy resin as the base material, polyamide resin as the curing agent, together with the appropriate additives, extender pigments, phosphorus iron powder, mixed organic solvents, etc. The sub-assembly products, which can be up to 85% ** content. With natural fast drying, strong adhesion, strong anti-corrosion and other characteristics.

Epoxy zinc-rich primer can be used as a supporting primer for heavy anti-corrosion coating. It is a common type of primer used in heavy corrosion engineering of steel structures and has a cathodic protection function. It is suitable for storage tanks, containers, steel structures, steel pipes, and oceans. Platforms, ships, seaport facilities, and primers for harsh and anti-corrosive environments. Epoxy zinc-rich primer as long-term anti-corrosion primer has stronger anti-corrosion performance than other primers, good heat resistance, excellent static conductivity, and does not affect the advantages of welding construction. Epoxy zinc-rich primer is compatible with most coatings and is a good primer for multi-coat systems. Due to the high content of ** in the coating, this primer will not be used in future welding processes. Destroyed and peeled off, this makes the epoxy zinc-rich primer can be used for workshop pre-priming on general steel plate; it has good wear resistance, chemical resistance, aging resistance and oil resistance (waterproof, Moisture-proof, dust-proof) performance is also very good, suitable for a variety of strong corrosion environment.

Construction process points:

First, the surface treatment of steel before spraying primer The surface treatment is the key work of painting. The protective effect of zinc-rich epoxy on the substrate, in addition to its own quality, the quality of the surface quality of the substrate on the quality of the paint film has reached more than 50%.

Surface treatment before spraying includes three aspects:

1) Structure treatment: Before the rust removal, the steel itself must be subjected to a certain structural treatment, such as sharp edge grinding, welding hole repair welding and grinding equality, so as to ensure that the primer coating can be completely covered.

2) The degree of surface cleanliness: The surface of the steel must be rusted, grease, dirt, moisture and other surface appendages, and to ensure that the surface is free of impurities such as oil and gas and stickies.

3) Increase the surface roughness: The rough surface can increase the actual bonding area between the base film surface and the workpiece, which is beneficial to improve the adhesion of the coating. But holes and obvious depressions in the base should be filled first.


Second, the spraying process to master the correct spraying process is also one of the key to ensure the quality of the primer coating.

1, mixing and stirring epoxy zinc-rich primer is a two-component coating for the sub-assembly products, A component: B component = 10:1, when mixed, because the main component A component contains a lot of **, It is easy to form precipitates. Therefore, component A should be stirred thoroughly to make the upper and lower layers of paint uniformly and without any deposits or agglomerates present. Then, the component B is poured into the main agent at a ratio of 10:1 with stirring. A component, and at the same time fully mixed evenly, standing, aging 30min before the construction can be carried out, because the paint and air contact time is too long will react with the carbon dioxide in the air, the paint surface will form a layer of paint film to paint glue, Therefore, the mixed paint must be used up in 6 hours.

2. When diluting the two-component primer, the thinner should be added after curing, and stir evenly. Some thick-film epoxy zinc-rich primers can be applied smoothly without air or with little or no addition.

3, spray paint environment, the substrate temperature should be higher than the dew point above 3 °C, when the substrate temperature is lower than 5 °C, the paint film is not easy to cure, dry slowly.