Paint chemicals

Features:

Excellent mechanical properties and flexibility;

Excellent outdoor weather resistance;

Suitable for use at low temperatures

Powder Coatings for Auto Accessories: Technical Overview

Category	Specifications
Definition	Dry finishing process applying decorative/protective polymer powder to auto parts
Common Substrates	Aluminum alloys, steel, magnesium, composites

Coating Types Comparison

Coating Type	Advantages	Limitations	Typical Applications
Epoxy-Polyester Hybrid	Cost-effective Good corrosion resistance	Poor UV stability	Engine brackets Underbody parts
Polyurethane	Excellent UV/chemical resistance High gloss	Higher cost	Wheel rims Exterior trim
Acrylic	Superior clarity Color retention	Limited flexibility	Emblems Light covers
TGIC-Free Polyester	Weather resistance REACH compliant	Temperature sensitive	Roof rails Door handles

Performance Standards

Test	Requirement	Method
Salt Spray	1000+ hours (no corrosion)	ASTM B117
Gravel Impact	Class 4 (SAE J400)	SAE J400
Adhesion	5B (cross-cut)	ASTM D3359
UV Resistance	ΔE<2 after 2000h	ISO 11341

Application Process

Step	Parameters	Equipment
Pretreatment	Zinc phosphate conversion coating	7-stage spray system
Powder Application	50-80kV electrostatic spray	Automatic guns
Curing	180°C × 15min	IR/convection oven
Quality Control	DFT: 60-120μm Gloss: 20-90%	Elcometer gauges

Market Trends (2023-2025)

Trend	Impact	Example Products
Low-Temperature Cure	Enables coating of heat-sensitive composites	Plastic grilles EV battery parts
Anti-Fingerprint	Premium surface feel	Door sills Console trims
Color-Shifting	Customization demand	Motorcycle accessories Aftermarket wheels
Sustainable Formulas	Bio-based resins gaining share	Interior trim parts

Cost Analysis

Factor	Epoxy-Polyester	Polyurethane	Acrylic
Material Cost	$15-20/kg	$25-35/kg	$30-45/kg
Process Efficiency	85% transfer rate	80% transfer rate	75% transfer rate
Lifetime	5-7 years	8-10 years	10+ years