Various types of anti-corrosion primers

Composition A two-component epoxy resin paint composed of epoxy resin, iron oxide red, anti-rust fillers, additives, solvents, etc.

Main Features· Excellent adhesion, flexibility, and impact resistance

· Outstanding water and salt spray resistance

· Superior anti-rust performance

· Good compatibility with topcoats

· Excellent intercoat adhesion

Applications Suitable for steel structures in ports, docks, heavy machinery, mining machinery, power machinery, hydraulic engineering, and above-waterline ship structures, among others

Technical Specifications Drying time (25℃)         Surface     dry    ≤ 1h

Hard dry ≤ 24h

Flexibility (mm) ≤  2

Impact strength (cm) ≥ 50

Adhesion (grade) ≤ 2

Hardness (double pendulum) ≥ 0.4

Application Parameters Components: Part A and Part B

Mixing ratio (by weight) 25:4

Mixing method: Thoroughly stir Part A until uniform, add Part B, and continue stirring until fully mixed

Coating thickness (typical values) Wet film thickness: 100 μm

Dry film thickness: 40  μm

Theoretical spreading rate: 6.0 m²/kg (average/smooth surface, excluding loss)

Flash point: 27℃                                                               

Induction period (20℃)           30 min

Pot life (20℃)           8 h

Recoat Interval (20℃) Minimum               8 h

Maximum 7 d

Compatible Primers Epoxy zinc-rich primer, inorganic zinc-rich primer, etc.

(Or applied directly on steel surfaces with rust removal grade reaching Sa2.5)

Compatible Topcoats Epoxy topcoat, epoxy rubber topcoat, polyurethane topcoat, epoxy glass flake anti-corrosion paint, etc.

Surface Preparation· Steel with scale: Treated by shot blasting or sandblasting to Sa2.5 grade. In areas where sandblasting is not feasible, mechanical grinding or chemical treatment should be used to remove all loose debris, achieving a surface roughness of 75–100 μm. The surface must be clean, dry, rust-free, and dust-free.

· Steel without scale: Sandblasted to Sa2.5 or mechanically ground with pneumatic or electric tools to St3 grade.

· Steel with shop primer: Light sweep blasting or pneumatic (electric) tools for secondary rust removal to St3 grade.

· Welded, cut, or heat-corrected areas: Remove welding slag and spatter, grind smooth, and then polish with an elastic grinding wheel to St3 grade.

Substrate Temperature· Substrate temperature must be at least 3°C above the dew point.

· When the substrate temperature is below 10°C, the curing reaction between epoxy and hardener slows down. In such cases, a low-temperature hardener may be used.