Anti-Corrosive Powder Coating

1. Core Anti-Corrosion Performance Advantages

• Excellent Corrosion Resistance: The dense coating film has strong barrier properties, which can effectively prevent the penetration of corrosive media. It exhibits outstanding resistance to neutral salt spray, acid rain, alkali washing, and salt fog corrosion. The neutral salt spray resistance can reach ≥1000 hours (for heavy-duty anti-corrosion grades), and the damp heat resistance is ≥2000 hours, ensuring long-term stable protection of the substrate in harsh environments such as coastal areas, industrial zones, and underground.
• Strong Substrate Adhesion: The coating film has excellent adhesion to various metal substrates (carbon steel, stainless steel, aluminum alloy, galvanized sheet, etc.), reaching Grade 0 (ISO 2409 standard). It can firmly bond with the substrate without peeling, blistering, or cracking even under mechanical vibration or temperature changes, laying a solid foundation for anti-corrosion performance.
• Superior Mechanical Properties: While providing excellent anti-corrosion protection, the coating film also has good mechanical strength, including high impact resistance (≥50 KG·cm), excellent flexibility (bending test ≤2 mm), and scratch resistance. It can withstand the wear and impact during product transportation and use, avoiding coating damage caused by external forces and ensuring the integrity of the anti-corrosion barrier.
• Wide Curing Adaptability: According to different application scenarios and production processes, customizable curing parameters are available. The typical curing conditions are 160℃~200℃ for 10~20 minutes; low-temperature curing formulas (120℃~140℃) can also be developed for heat-sensitive substrates, which expands the application scope while ensuring anti-corrosion performance.
• Eco-Friendly & Safe: As a solvent-free and VOC-free product, it does not emit harmful gases during application and curing, avoiding environmental pollution and health hazards to construction personnel. It is non-flammable, non-explosive, and easy to transport and store, meeting the environmental protection and safety requirements of various industries.

2. Typical Technical Parameters

3. Application Fields

• Industrial Pipeline & Storage Equipment: Buried oil and gas pipelines, water supply and drainage pipelines, chemical storage tanks, oil tanks, and pipeline supports. It can resist corrosion from underground moisture, soil chemicals, and chemical media in storage tanks.
• Architectural Steel Structure & Hardware: Steel structures of industrial workshops, bridges, coastal buildings, outdoor railings, canopies, and hardware accessories (hinges, fasteners, brackets). It can withstand corrosion from acid rain, salt fog (coastal areas), and atmospheric oxidation.
• Transportation Equipment: Auto parts (chassis, wheels, engine components), railway vehicle underframe components, ship hull accessories, port loading and unloading equipment, and highway guardrails. It can resist corrosion from road salt, sea water, and industrial fumes during transportation.
• Electrical & Industrial Equipment: Power transmission and transformation equipment casings, transformer oil tanks, motor casings, electromechanical equipment components, and outdoor environmental protection equipment. It can protect equipment from corrosion in complex industrial environments.
• Underground & Marine Engineering: Underground metal supports, marine platforms, coastal navigation aids, and underwater metal components. It can adapt to the long-term humid and salt-rich environment underground and in the ocean, providing reliable anti-corrosion protection.

4. Storage & Construction Notes

4.1 Storage Requirements

• Store in a cool, dry, and well-ventilated warehouse with temperature below 30℃ and relative humidity below 60%. Avoid direct sunlight, high temperature, rain, and moisture to prevent powder agglomeration or performance degradation.
• Keep away from fire sources, oxidants, and corrosive substances. Do not stack with other types of powder coatings to avoid cross-contamination.
• The shelf life is 6 months under proper storage conditions. For products beyond the shelf life, they can be used only after passing re-inspection (including fluidity, curing performance, and film-forming effect).
• Seal the packaging immediately after each use to prevent moisture absorption and contamination of the powder.

4.2 Construction Requirements

• Substrate Pre-treatment: This is a key step to ensure anti-corrosion performance. For metal substrates, perform pre-treatment such as degreasing, derusting, and phosphating (or sandblasting) to remove oil, rust, moisture, and loose deposits. The substrate surface should reach Sa2.5 grade (for sandblasting) or have a clean phosphating film to improve coating adhesion.
• Spraying Methods: Suitable for corona electrostatic spraying and triboelectric electrostatic spraying. Before spraying, clean the spraying equipment to avoid mixing with other powders. Adjust the spraying pressure (0.3~0.5 MPa) and electrostatic voltage (60~80 KV) to ensure uniform powder deposition.
• Film Thickness Control: The recommended dry film thickness is 60~100 μm (adjust according to the corrosion level). Excessive thickness may cause pinholes or poor leveling; too thin thickness will reduce the anti-corrosion barrier effect. Use a film thickness gauge to monitor the thickness during construction.
• Curing Control: Strictly follow the recommended curing temperature and time. The curing temperature refers to the actual temperature of the workpiece (not the oven temperature). Use a temperature tester to monitor to ensure complete curing. Incomplete curing will significantly reduce the anti-corrosion performance and mechanical properties of the coating film.
• Safety Protection: Construction personnel should wear anti-static overalls, masks, and goggles to avoid inhaling powder. Prohibit smoking and open flames in the construction and storage areas. Equip with appropriate fire-fighting equipment.

5. Summary