Precautions for Construction of Epoxy Zinc-rich Primer

Epoxy zinc-rich primer has excellent cathodic protection and is a universal anti-rust primer in industrial anti-corrosion coatings. It dries quickly, has strong adhesion, and has excellent anti-corrosion and anti-rust properties. In order to ensure the performance of the paint film, the following points need to be paid attention to during construction:

1. Substrate treatment: Remove dust, oil stains and other debris on the surface of the substrate; the substrate needs to be sandblasted or polished to a certain degree of roughness to reach 40μm-80μm to strengthen the adhesion of the paint film and the substrate.

2. When the zinc rich primer is exposed to the air for a long time, a layer of zinc salt will form on the surface. It must be cleaned up during the construction of the next paint, otherwise it will affect the adhesion between the paint films and cause paint film problems.

3. Dry spraying is easy to occur during construction in high temperature seasons. To prevent this phenomenon, an appropriate amount of thinner must be added during construction until it is not dry sprayed. Generally, the addition amount of spraying is 10-15% and brushing is about 5% .

4. When the temperature is low, winter curing agent is required. After the temperature is lower than 0 degrees, the epoxy paint and curing agent stop reacting, and it is not suitable for construction. You can switch to winter epoxy zinc-rich primer.

When applying epoxy zinc-rich primer, the above precautions must be kept in mind, any of which may cause irreversible paint film problems.