Industrial Painting & Liquid Coating Guide

Industrial liquid coating remains essential where powder coating cannot meet requirements: high-gloss finishes, extreme chemical resistance, heat-sensitive substrates.

Coating Methods

Method	Transfer Eff.	Automation
HVLP Spray	45-65%	Manual/robotic
Airless Spray	40-60%	Manual/robotic
Electrostatic Spray	60-85%	Robotic
Dip Coating	90-95%	Automated line

Paint Types

Epoxy: chemical resistance, primers
Polyurethane: UV-stable, abrasion resistant
Acrylic: fast drying, general purpose
Alkyd: low cost, structural steel
Zinc-Rich: galvanic protection
PVDF: 20+ year architectural

QC Standards

DFT: SSPC-PA2, 75-150 μm
Adhesion: ASTM D3359, min 4B
Salt spray: ASTM B117, 250-500+ h
Cure: MEK rub, 50+ double rubs

China Environmental Rules

Verify: low-VOC (< 420 g/L), valid discharge permit (& 73A0;污证), solvent disposal certs, VOC treatment system (carbon or RTO).

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