Analysis of salt spray resistance performance of epoxy zinc-rich primer

Epoxy-rich zinc primer is a commonly used anti-corrosion primer. In some highly corrosive environments, it is generally used as a supporting primer for heavy-duty anti-corrosion coatings. It is widely used in environments such as marine platforms, ships, and port facilities, which have high requirements for the salt spray resistance of paints. Let's take a look at the salt spray resistance of epoxy-rich zinc primer.

Factors Affecting Epoxy-rich Zinc Primer

The anti-corrosion and anti-rust of epoxy-rich zinc primer mainly rely on the cathodic protection of zinc in the paint. The zinc content in epoxy-rich zinc primer plays a great role in the anti-corrosion performance of the paint. Its salt spray resistance performance is also affected by the zinc powder content and the film thickness.

There are two types of salt spray resistance standards for epoxy-rich zinc: an old standard (2000) and a new standard (2009). Therefore, we often see different products with different salt spray resistance times, because different standards are used, but the effect is actually the same. For example, 72 hours under the old standard is equivalent to 400 hours under the new standard.

Performance Analysis of Epoxy-rich Zinc Primer

The salt spray resistance of epoxy rich zinc primer is affected by the zinc content. The national standard requires the zinc content to be more than 70%, but in fact, there are various zinc contents in the market, mainly used for different customers' different requirements for zinc content. The lower the content, the lower the salt spray resistance. According to the national standard, the salt spray resistance standard of epoxy-rich zinc primer is greater than 72 hours, and 1 hour in the laboratory is equivalent to one month in the outside world, so the salt spray resistance performance of epoxy-rich zinc primer can exceed 6 years according to the national standard.

The film thickness also affects the salt spray resistance performance. The old standard is 20-25μm and the new standard is 80-100μm.

The salt spray resistance performance of epoxy-rich zinc primer is mainly affected by the zinc content and film thickness, so when choosing and purchasing epoxy-rich zinc primer, be sure to ask what the zinc content is. Of course, the higher the zinc content, the better, but you should choose a primer with suitable zinc content according to your own anti-corrosion requirements.

Tianjin Jinhai Special Coatings & Decoration Co., Ltd. is a high-tech paint and coating manufacturer and developer integrating production, training and scientific research. We have passed the ISO9001 quality management system certification of China Classification Society and CCS factory certification. We mainly produce epoxy paints, zinc-rich paints, polyurethane paints, fluorocarbon paints, high-temperature resistant paints, acrylic paints, and water-based anti-corrosion paints, which are specialized for use in industries such as petroleum, chemical, metallurgy, power plants, machinery, and ships. Welcome to inquire.