Sharing the advantages and characteristics of epoxy zinc-rich primer

　　 Epoxy zinc-rich primer It is a type of coating, but it has specific advantages over conventional coatings, being superior in water resistance and protection compared to other similar coatings. In practical applications, it mainly serves as a protective layer in direct contact with various substrates, ensuring the durability and corrosion resistance of the substrate.

　　Epoxy zinc-rich primer, as a matching primer for heavy-duty anti-corrosion coatings, provides cathodic protection. It is suitable for metal equipment and building surfaces such as containers, steel structures, steel pipes, workshop floors, ships, and port facilities, as well as primers in harsh anti-corrosion environments. Epoxy zinc-rich primer has excellent anti-corrosion performance, good mechanical properties, outstanding adhesion, conductivity, and cathodic protection. What are the advantages of epoxy zinc-rich primer?

　　 Epoxy zinc-rich primer The film contains a large amount of zinc powder, providing cathodic protection and excellent rust prevention; good adhesion; good oil and water resistance, compatible with most anti-rust paints and topcoats. The shielding effect of epoxy zinc-rich primer mainly depends on the formation of insoluble salts and corrosion products. Traditional zinc-rich primers use spherical zinc powder, transferring electrons through point contact and maintaining point contact with the steel substrate. Due to point contact, the coating's conductivity is poor. To improve the coating's conductivity, a large amount of zinc powder must be added. At this time, the volume concentration of zinc powder far exceeds CPVC, and the binder is insufficient to fill the voids between the coatings, thus forming a porous coating structure.

　　 Epoxy zinc-rich primer Good anti-corrosion performance, good mechanical properties, strong adhesion, and has conductivity and cathodic protection. It can be used as a workshop pre-primer. When its film thickness is 15-25μm, welding does not affect welding performance. Epoxy zinc-rich primer can also be used as an anti-rust primer for bridges, ships, offshore oil drilling platforms, port facilities, etc.

　　Flake zinc powder is now widely used to enhance the physical shielding effect because the addition of flake zinc powder increases the penetration distance, and at the same time forms countless tiny areas in the coating, reducing the difference in thermal expansion coefficient between the coating and the metal substrate, reducing the shrinkage of the coating during the hardening process, reducing the internal stress of the coating, inhibiting cracking and peeling of the coating, improving the adhesion and resistance to media penetration, thereby improving the corrosion resistance of the coating. The corrosion products of zinc vary with different corrosive media, such as zinc oxide, zinc hydroxide, basic zinc carbonate, basic zinc oxide, zinc sulfate, etc. Due to the formation of these substances, the volume expands, filling the voids in the coating film, thereby preventing further contact between the metal surface and harmful media such as oxygen and water, playing a key role in physical shielding.