Automotive Parts Powder Coating MT-300 is a weather-resistant pure polyester powder coating developed for automotive exterior components that require long-term outdoor durability and stable appearance. You can rely on this series to provide consistent adhesion, balanced mechanical strength, and reliable UV resistance, making it suitable for vehicles exposed to sunlight, rain, temperature changes, and daily mechanical stress.
You can apply MT-300 to a wide range of automotive exterior parts where appearance retention and corrosion protection are critical, including:
Wiper frames
Roof racks
Front and rear bumpers
Exterior brackets and structural accessories
Decorative and functional metal components on passenger and commercial vehicles
Typical application validation is carried out on steel or aluminum substrates commonly used in automotive manufacturing, with adhesion, impact resistance, and corrosion resistance evaluated according to relevant ISO and ASTM test methods.
| Item | Instrument | Criteria | Test Standard |
|---|---|---|---|
| Pencil Hardness | Pencil Hardness Tester | ≥1H | ASTM D3363 GB/T 6739 |
| Impact Resistance | Impact Tester | 50 kg·cm (diameter 8mm) 2.5 Nm (diameter 16mm) (diameter 20mm) |
GB/T 1732 ASTM D2794 ISO 6272 |
| Bend Resistance | Bend Tester | ≤2mm (cylindrical mandrel) Conical mandrel bending Cylindrical mandrel |
GB/T 6742 ASTM D1737 ISO 1519 |
| Adhesion | Cross-cut Tester | 0级 (Class 0) | ISO 2409 ASTM D3359 |
| Cupping Test | Cupping Tester | ≥6mm | ISO 1520 GB/T 9753 |
| Salt Spray Resistance | NSS Salt Spray Tester | ≥500H, Wb ≤2mm | ASTM B-117 ISO 7253 |
| Damp Heat Resistance | Constant Temperature & Humidity Chamber | ≥1000H, slight loss of gloss | ISO 6270 GB/T 1740 |
| Weatherability | Artificial Weathering Chamber | QUV-B313, 500H ≥ Grade 3 | ISO 11341 GB/T 1865 |
Note: All tests were conducted on 0.8 mm degreased and derusted cold-rolled steel plates, with a coating thickness of 60–80 µm. Coating performance indicators may vary slightly depending on gloss level.
You achieve strong and stable adhesion to properly pretreated metal substrates, supporting long-term coating integrity.
You benefit from balanced mechanical properties that help the coating withstand impact, vibration, and daily wear on exterior vehicle parts.
You obtain excellent outdoor durability, with reliable resistance to UV exposure and color degradation.
You maintain a consistent surface appearance under prolonged exposure to sunlight, moisture, and temperature cycling.
You gain a coating system suitable for mass production and automated automotive coating lines.
We solved a durability and appearance retention challenge for an automotive exterior parts manufacturer.
The customer was experiencing premature color fading and surface chalking on roof racks and wiper frames after extended outdoor exposure. These parts were installed on vehicles operating in regions with strong UV radiation and frequent rain, leading to customer complaints and warranty pressure.
We recommended Automotive Parts Powder Coating MT-300 and adjusted the curing window to ensure full polyester crosslinking while maintaining production efficiency. After application, the coated components demonstrated stable adhesion, improved resistance to environmental aging, and a consistent appearance after outdoor exposure testing based on ISO and ASTM evaluation practices. This helped the customer reduce rework rates and improve long-term product reliability in real-world service conditions.
Powder coatings can be categorized by resin system (epoxy, polyester, hybrid, polyurethane), appearance (smooth, texture, hammer, metallic, pearlescent), or performance level (anti-corrosion, heat-resistant, UV-resistant, architectural grade, automotive grade).
Powder coatings offer thousands of colors in gloss, matte, satin, metallic, candy, texture, wrinkle, hammer tone, wood grain, fluorescent, and other custom effects. Special powders can create soft-touch, anti-scratch, anti-fingerprint, or anti-graffiti surfaces.
The process generally includes surface pretreatment (degreasing, phosphating, chromating, sandblasting), drying, electrostatic spraying, curing in an oven, and cooling. A well-controlled pretreatment and curing process ensures strong adhesion and long service life.
Powder coatings are environmentally friendly, solvent-free, and produce minimal waste. They offer excellent corrosion resistance, weather durability, mechanical strength, and uniform film appearance. The coating is tough, impact-resistant, scratch-resistant, and has a long lifespan.
Powder coatings are widely used in appliances, aluminum profiles, architectural components, automotive parts, bicycles, furniture, outdoor equipment, machinery, electrical cabinets, pipeline systems, and general industrial and consumer goods.
Powder coating is a dry finishing technology where finely ground powder is electrostatically sprayed onto a metal or non-metal surface and then cured at high temperature. After curing, the powder melts into a continuous, durable, and decorative coating layer.
Powder coating protects the substrate from corrosion, weathering, chemical attack, and mechanical wear. It also provides decorative appearance with rich colors, gloss levels, textures, and special effects.
In many industrial applications, powder coating outperforms liquid paint. It forms a thicker and tougher coating, resists corrosion and chemicals better, and does not contain VOCs. It also provides excellent consistency and cost-effective mass production.
It is called powder coating because the coating material is a solid powder instead of a liquid paint. The coating is formed by melting and curing powder particles under heat.
Powder coatings include several families depending on resin chemistry:
• Epoxy powders
• Polyester powders
• Epoxy-polyester hybrid powders
• Polyurethane powders
• Acrylic powders
• Fluorocarbon (PVDF) powders
Each type has its own performance features such as corrosion resistance, UV resistance, chemical resistance, outdoor durability, or decorative properties.
Powder coatings are based on thermoset or thermoplastic resins combined with pigments, curing agents, fillers, additives, and in some cases metallic or effect particles. Common substrates include steel, aluminum, galvanized metal, MDF, and certain heat-resistant plastics.
The lifespan depends on powder type, film thickness, application method, pretreatment, and service environment. Indoor coatings can last more than 10–20 years. High-grade outdoor polyester or fluorocarbon powders can last 15–25 years or longer under UV exposure.
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