With the widespread use of anticorrosive coatings, there has been an increasing number of zinc-rich primers on the market, mainly divided into two categories: epoxy zinc-rich primers and inorganic zinc-rich paints. Many customers have questions: what are the differences between these two types of paint? How do you choose?

The Difference Between Epoxy Zinc Phosphate Primers and Inorganic Zinc Phosphate Paints Series:

1. The coating of the epoxy zinc-rich primer offers better toughness and is easier to apply, whereas the inorganic zinc-rich series paint is more prone to cracking.

2. The inorganic zinc-rich paint series requires a higher level of surface preparation for the base, necessitating thorough leveling and polishing, yet it can be used without topcoat; whereas the epoxy zinc-rich primer has no base requirements, but an epoxy intermediate coat treatment is required prior to painting.

3. The inorganic zinc-rich coatings offer excellent weather resistance and salt spray resistance, while the epoxy zinc-rich primers must be mixed with weather-resistant materials.

Applications of Epoxy Zinc-rich Primers and Inorganic Zinc-rich Paints Series:

Epoxy zinc-rich primers are widely used for the coating of various steel structures in atmospheric environments. Examples include bridges, containers, towers, ship hulls, and building steel structures.

The primary application fields of the inorganic zinc-rich paint series include:

1. The field of heavy-duty anti-corrosion coatings that must use water-based paints. For instance, cities with restrictions on the outdoor use of paints.

2. Long-term operation exceeding 100°C, such as anti-corrosion for the outer wall of steam pipes.

3. The inorganic zinc-rich coatings are also used as anticorrosive paints for the interior walls of oil tanks or other chemical storage tanks.

4. High-strength bolt surface with a high anti-slip coefficient inorganic zinc-rich paint series. Recommended.

The adhesion, anti-slip friction coefficient, and repair rate of the zinc-rich paint processed by machine are significantly superior to those of flame-sprayed zinc and aluminum. The anti-slip value has reached the international advanced level. This paint is easy to handle, non-toxic, and environmentally friendly, which can improve working conditions, enhance work efficiency, and reduce engineering costs. All its performance fully meets the design requirements. In addition to being used on steel bridges, it can also be widely applied in iron tower projects such as television towers, transmission line frames, and electrified railway towers; surface protective coatings for heavy machinery industries such as cranes and tower steel structures.

In terms of coating performance, inorganic zinc-rich coatings have high hardness and brittleness, making them unsuitable for thin-walled steel structures but ideal for large-scale steel structures, as they experience minimal deformation and their high hardness makes them less prone to damage upon curing. As for salt spray resistance, inorganic zinc-rich coatings far surpass epoxy zinc-rich coatings, especially in seawater. The performance of a single layer of inorganic zinc-rich coating is exceptionally excellent, fully capable of achieving long-term corrosion resistance.

Inorganic zinc-rich coatings are difficult to counterfeit, so as long as the process is strictly controlled, a well-applied coating will exhibit excellent performance. Conversely, epoxy zinc-rich primers are highly susceptible to counterfeiting, making it nearly impossible to detect shortfalls immediately, leading to a proliferation of subpar low-zinc epoxy zinc-rich primers in the market.