Fast-dry Waterborne 2K Epoxy Coating Resin: 300+hr Salt Spray For Automotive Axles And Chassis

Our R&D team has successfully formulated a two-component (2K) epoxy coating system composed of:

• WL-AD203 epoxy dispersion (Component A)
• WL-AC040 water-based epoxy hardener (Component B)

Performance Characteristics:
• Fast surface drying properties
• Exceptional corrosion resistance (>300 hours salt spray test)
• Excellent water resistance (>15 days immersion)
• Economical formulation for metal substrate priming

Complete Automotive Coating Solution:
This advanced 2K epoxy primer system, when combined with our specially formulated one-component acrylic topcoat, provides comprehensive protection for:
• Critical automotive components (axles, frames, chassis)
• Heavy-duty corrosion prevention
• OEM coating manufacturer specifications

System Advantages:
✓ Superior rust protection
✓ Simplified application process
✓ Cost-effective production solution
✓ Meets industry performance standards

WL-AD203 is an aqueous epoxy dispersion formulation. When combined with its designated water-based epoxy curing agent, this system enables the production of high-performance waterborne epoxy coatings. The product is specifically engineered for:

• Corrosion-resistant primer applications
• Epoxy floor coatings
• Various metal substrate protection

Key Technical Features:
• Accelerated surface drying properties
• Compatibility with wet-on-wet application techniques
• Rapid hardness development
• Extended pot life for improved workability

WL-AC040 Epoxy curing agent

Item	Value	Testing Method
Appearance	Light yellow transparent liquid	Visual
Non-Volatile content(%)	40±2	GB/T 1725-2007
Viscosity(mPa.s)(25℃)	2000~8000	GB/T 21059-2007
Active hydrogen equivalent	300±10	----

WL-AC-040 Water-Soluble Polyamine Adduct

WL-AC-040 is a modified polyamine-based curing agent specifically formulated for waterborne epoxy resin systems. This advanced formulation is engineered for anti-corrosion primers and epoxy floor paints for various metal substrates.

Key Performance Characteristics:
• Rapid curing properties
• Minimal surface drying time
• Superior substrate adhesion
• Extended working time
• Exceptional cost-performance ratio

WL-SP1000 is a water-based emulsion of acrylic copolymer.

Item	Value	Testing Method
Appearance	Milky white liquid	Visual
Non-Volatile content(%)	47±1	GB/T1725-2007
Viscosity(mPa.s)(25℃)	50~500	GB/T 21059-2007
PH	7.0~9.0	GB/T 9724-2007
Minimum film forming	40	——

Features: excellent gloss, excellent initial water resistance, good water resistance, strong versatility, suitable for

primer and topcoat of various metal substrates.

A set of coating test data consisting of WL-AD203 epoxy/WL-AC040 curing agent primer + WL-SP1000 single

component topcoat

WL-SP1000 black paint film test
Neutral salt spray test	>500h
Initial water resistance	>120h
40'C water immersion	>120h

Drying conditions:
Primer leveling for 15 minutes, baking at 60'C for 2 hours, and curing for 1 day    

                Salt spray test 20 days , test continue                                 Salt spray test 30 days failed