Sharing the advantages and characteristics of epoxy zinc-rich primer
Release Time:
2022-10-20
Epoxy zinc-rich primer is a type of coating, but it has specific advantages over conventional coatings, offering superior 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 It is a type of coating, but it has specific advantages over conventional coatings, with greater advantages in water resistance and protection than other similar coatings. In practical applications, it is mainly used as a protective layer in direct contact with various substrates, which can ensure the durability and corrosion resistance of the substrate.
Epoxy zinc-rich primer, as a matching primer for heavy-duty anti-corrosion coatings, has cathodic protection and is suitable for metal equipment and building surfaces such as containers, steel structures, steel pipes, workshop floors, ships, port facilities, etc., as well as primers in harsh anti-corrosion environments. Epoxy zinc-rich primer has excellent anti-corrosion performance, good mechanical properties, outstanding adhesion, electrical 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, which has cathodic protection and excellent rust resistance; good adhesion; good oil and water resistance, and can be used 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 to transfer electrons in the form of point contact and maintain point contact with the steel substrate. Due to point contact, the conductivity of the coating is poor. In order to improve the conductivity of the coating, a large amount of zinc powder must be added. At this time, the volume concentration of zinc powder far exceeds the CPVC, and the binder is not enough to fill the gaps between the coatings, resulting in a porous coating structure.
Epoxy zinc-rich primer Good corrosion resistance, good mechanical properties, strong adhesion, and has electrical conductivity and cathodic protection. It can be used as a pre-coated primer for workshops. Welding with a film thickness of 15-25μm does not affect the welding performance. Epoxy zinc-rich primer can also be used as an anti-rust primer for bridges, ships, offshore oil drilling platforms, harbor facilities, etc.
Flake zinc powder is now widely used to enhance physical shielding because the addition of flake zinc powder increases the penetration distance and 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, and improving the adhesion and resistance to medium penetration of the coating, thereby improving the corrosion resistance of the coating. The corrosion products of zinc vary depending on the corrosive medium, 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 and fills 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.
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