Epoxy zinc-rich primer

I. Product Performance

This product dries quickly, exhibits excellent adhesion, and has good impact resistance. The paint film provides cathodic protection, boasts excellent rustproofing and durability, as well as superior resistance to salt spray, oil, and solvent.

Section II: Product Application

Used as anti-rust primer for heavy-duty anticorrosive systems on steel structures such as bridges, port machinery, heavy equipment, oil extraction and mine equipment, buried pipelines, hydraulic steel sluice gates, steel structures of workshops, outer walls of oil storage tanks, gas holders, ship hulls above the waterline, and decks. It is a配套底漆 for epoxy intermediate coat and epoxy topcoat.

III. Protection Guidelines:

High heat resistance - Up to 200°C dry heat

Weather resistance - May exhibit some pilling and yellowing when exposed, but can withstand external exposure with an appropriate exterior coating.

Solvent-resistant; Resistant to splashes and spills from aromatic hydrocarbon solvents and most alcohols.

Acid Resistance - Not suitable for direct use in acidic environments.

Alkali Resistance - Do not use in strongly alkaline environments without an appropriate outer coating.

Good salt resistance; excellent resistance to neutral and alkaline salts when coated.

Waterproof - Can be immersed in fresh and saltwater with an appropriate outer coating.

Wear-resistant; excellent wear resistance after full curing

4. Technical Specifications

Project  Indicator

Film Color and Appearance Gray Matte

Viscosity (Paint F-4), s  ≥ 150

Drying Time (25℃), not more than

Surface Treatment              0.5

Pragmatic              24

Impact Strength, cm 50

Tensile Flexibility, mm ≤ 3

Adhesion, Grade                Not greater than 1

Salt-resistant (3% NaCl immersion for 48 hours) No change

Section 5: Construction Reference

1. Instructions for Use: Thoroughly mix both components by stirring or using a mechanical stirrer. Re-mix completely before use. Do not mix fresh mixed material with previously mixed material. Curing speed depends on temperature; ventilation conditions, film thickness, humidity, dilution, and other factors will also affect drying rate. The mixing temperature of the base material and hardener should be above 15°C; otherwise, add diluent to achieve the required viscosity for application. Excessive diluent may reduce sag resistance and curing speed, decrease film thickness; diluent should be added after mixing. The actual application rate should deduct about 5%–25% (depending on different application methods) for losses.

2. Surface Treatment: The coated material must be processed. For oxidation-free steel: sandblasting to Sa2.5 grade, with a surface roughness of 30-75μm, or use acid pickling, neutralization, and passivation; for steel with oxidation scale: sandblasting to Sa2.5 grade, or grind using an air or electric elastic abrasive wheel to St3 grade; for steel coated with workshop primer: re-rust removal at paint film damage, rust, and white rust on the zinc powder primer, and then grind to St3 grade.

Brush/roll coating: Used for small area coverage only, apply the mixture to the treated surface. Optionally, add epoxy thinner 0-15% for ease of application. Multiple coats are required when brushing or rolling to achieve the desired thickness.

Air Spray: Generally does not require thinning, but for convenience, can add up to 0-15% of epoxy thinner (X-2).

Airless Spray: Generally does not require thinning, but for convenience, up to 15% of epoxy thinner (X-2) can be added. The pressure ratio is 23:1 or 32:1, with a nozzle size of 0.43-0.48mm.

Coating Overlay: Proper methods should be used to inspect the previous coating for peeling, such as the cross-hatching or grid marking method. If peeling is detected, the aged coating must be removed, and the surface must be free of oil, grease, and other contaminants.

Post-processing Coating Accessories: Epoxy Intermediate Coating, Epoxy Asphalt, Polyurethane, Chlorinated Rubber

Tool Cleaning: Utilize Epoxy Thinner X-2

3. Mix the product thoroughly before use. Add hardener according to the weight ratio of paint to hardener at a ratio of 23:2. Allow to mature for 15 minutes before applying.

4. The construction uses airless spraying, with a single coat resulting in a wet film thickness of 100-150μm and a dry film thickness of 50-80μm. It can also be brushed or rolled on, requiring 2-3 coats.

5. The theoretical usage of this product is approximately 314g/m2. The recoating interval is as follows:

Temperature 10℃ 25℃ 30℃

Short 48h / 24h / 16h

Several months (when the zinc salt has not formed on the paint film surface)

6. Post-processing coatings: Epoxy iron oxide anti-rust paint, iron red epoxy anti-rust paint, epoxy zinc phosphate anti-rust paint, epoxy aluminum triphosphate anti-rust paint, epoxy asphalt super thick paste anti-rust paint, and epoxy asphalt thick paste anti-rust paint, etc. However, they should not be used in combination with oil-based, alkyd, or polyester paints.

Six, Cautionary Notes

This product is flammable. No smoking or open flames are allowed during installation, and the work environment must be well-ventilated.

2. This product should be mixed with the hardener immediately before use, and the hardener should be used up within 2 hours of addition. It is prohibited to pour the remaining paint back into the original can.

3. The base material temperature must be above the dew point by more than 3°C. When the air temperature is below 5°C, the reaction between the paint and hardener stops, making it unsuitable for application.

4. Relative humidity must not exceed 85%. Construction should be halted during rainy weather or when the environmental humidity is very high.

5. Product shelf life is 1 year