Automotive Parts Painting Line for Chassis & Body Structures: Corrosion Protection First

Chassis and body structure parts are the backbone of every vehicle—and they face the harshest environment on the road. Water, mud, de-icing salts, and stone chips constantly attack these components. Choosing the right painting process is not optional; it is a matter of safety, longevity, and OEM compliance.

Typical Parts We Paint

• Frame rails (ladder frame, monocoque)
• Sub-frames (front and rear)
• Control arms / A-arms
• Swing arms / trailing arms
• Crash beams / bumper reinforcements
• Cross members and brackets

Recommended Process: Cathodic E-coat + Powder Coating

This two-layer system is the industry benchmark for chassis corrosion protection.

Step 1: Cathodic E-coat (Electrophoretic Deposition)

E-coat uses an electric field to deposit paint uniformly on every surface—including interior cavities, welded seams, and complex geometries that spray guns simply cannot reach.

Step 2: Powder Coating Topcoat

An epoxy or polyester powder topcoat is electrostatically applied over the e-coat layer, adding stone-chip resistance, UV stability, and a clean finished appearance.

Key Buyer Concerns — Answered

1. Chrome-Free Pretreatment

Environmental regulations in the EU, North America, and increasingly in Asia require chrome-free or phosphate-free pretreatment. Our zirconium-based systems meet these standards while maintaining coating adhesion.

2. Real-Time Bath Monitoring

Our PLC-controlled e-coat lines continuously monitor pH, conductivity, MEQ, and solids percentage. Data is logged to the MES system for full traceability—essential for IATF 16949 compliance.

3. Power-and-Free Conveyors

Chassis parts are heavy and irregularly shaped. Power-and-free conveyors allow accumulation without collision, precise dwell times in each zone, and easy rerouting for mixed-model production.

Geetech Turnkey Solution

At Dongguan Geetech, we design and build complete chassis painting lines with integrated pre-treatment, e-coat, powder booths, curing ovens, and wastewater treatment. Our 4,000 m² testing workshop validates every line before shipment.