Water-based Epoxy Anti Corrosive Primer (two component)

*Product Description:

*Product Features:

● Anti-corrosion and anti-rust: Add anti-rust pigments to effectively block moisture and oxygen, delay corrosion of metal substrates, and are suitable for humid environments;

● The film has excellent water resistance and anti-rust performance;

● Strong adhesion: Epoxy resin components can adhere tightly to a variety of substrates (including metal and concrete), solving the problems of sanding and hollowing of the base layer;

*Product Application:

It is suitable for anti-corrosion and anti-rust primer on base surfaces such as concrete, steel, galvanized sheet, aluminum alloy, etc., and is widely used in construction, bridges, underground pipelines, industrial equipment, hydraulic equipment, chemical, mechanical equipment, building steel structures, thermal power plants, nuclear power facilities, wind towers and various oils, high purity gases and organic chemical storage tanks.

*Technical Datas:

Execution standards: HG/T4759-2014

*Surface Treatment:

To ensure film adhesion and long-term corrosion protection, the substrate surface must be thoroughly cleaned of oil, rust, scale, old paint, and loose impurities before application. Preparation standards should meet the following:

All surfaces to be coated should be clean, dry and free from contamination. Before painting, all surfaces should be in accordance with the ISO_{8504: 2000} standard evaluation and processing.

The scaled steel is blasted to Sa_2.5 grade, surface roughness is 30-75μm, or pickled, neutralized and passivated;

Oxide-free steel blasted to Sa_2.5 grade, or polished to St₃ grade with pneumatic or electric elastic grinding wheel;

Steels coated with workshop primer paint film damage, rust and white rust on zinc powder primer should be derusted twice, white rust is removed and polished to St₃.

Other surfaces This product is used for other substrates, please consult our technical department.

*Construction Condition:

The substrate temperature is not lower than 5 ℃, and at least 3℃ higher than the air dew point temperature and the relative humidity is <85% (temperature and relative humidity should be measured near the substrate).Construction is strictly prohibited in fog, snow and windy weather.

*Construction Steps:

Step 1: Substrate Surface Preparation (The Key Step)

The quality of surface preparation directly determines the adhesion and lifespan of the paint film.

Metal surfaces must be degreased and rust-free (to Sa2.5 or St3 standards) to ensure metal surfaces to be painted must be thoroughly clean, completely dry, and free of contaminants such as oil, grease, dust, salt, scale, and loose old paint.Visible moisture or condensation is not allowed.

The treated surface should meet the design cleanliness and roughness standards, and paint should be applied as soon as possible to prevent rust recurrence or secondary contamination.

Step 2: Apply Water-based Epoxy Primer

After opening the bucket, stir evenly by electric mixer until the color and viscosity are consistent, slowly pour component B (curing agent) into component A (paint), thoroughly according to the specified ratio (by weight). After stirring completely, let the mixture stand for 5-10 minutes to mature. and the mixed coating used out within 4 hours (pot life).Then brush/roll or spray, Airless spraying offers the highest efficiency and produces the best paint film quality. If you have professional equipment and techniques, it will be best.The theoretical paint consumption is 0.2kg/m²/coat.(Actual usage may vary depending on surface texture, porosity, application method and operator technique.)

Note:

*If thinning is necessary for proper application, add water gradually while mixing. Dilution ratio of 10-15%% by weight. Over-thinning will adversely affect film build, hiding power, and long-term durability. Adjust the viscosity to suit the specific application method (brushing, rolling, or spraying).

* Before applying the next coat, ensure the previous coat is fully cured, clean, dry, and free of all contaminants.

* Avoid vigorous stirring to prevent the introduction of excessive bubbles.

*Construction Method:

Spraying: Airless spraying or air spraying. It is recommended to use high-pressure airless spray.

Brushing/Rolling: The specified dry film thickness must be achieved.

*Matching Paint:

It is recommended to use appropriate water-based epoxy intermediate paint and water-based acrylic/polyurethane topcoat to form a “primer-intermediate-topcoat” composite coating system to achieve long-term corrosion protection and decorative purposes and extend the overall coating life.

*Precautions:

▶ The construction temperature is 5℃-35℃ (Specific adjustments are made according to product characteristics, the humidity is ≤85%.

▶ Maintain good ventilation to facilitate moisture evaporation and paint film curing.

▶ Protect from freezing during storage.

▶ Protective equipment must be worn during sandblasting

▶ Fog, rain, snow, wind and rain is strictly prohibited construction.

*Storage and Self Life:

▅ Store in a cool, dry, ventilated indoor warehouse at a temperature of 5-35 ℃, avoid freezing and direct sunlight;

▅ The self life is 12 months. If products that exceed the storage period can be used after passing the inspection.

*Package:

Paint：20 Kg/Bucket;  Curing agent: 4Kg/Bucket

Weight mixed ratio=5:1