In the modern cleanroom construction, the choice of panel surface material directly impacts contamination control, durability, and long-term operational reliability. For the VCLEAN® Series modular clean panels, prepainted steel sheets are the preferred solution. However, to achieve optimal performance, the coating, the metallic coating, and base metal must be carefully matched to the specific building occupancy and the intended service life.
Performance and Recommendations for Prepainted Steel Sheets in VCLEAN® Series Modular Clean Rooms
The surface material of VCLEAN® Series modular clean panels plays a critical role in maintaining cleanliness, durability, and structural integrity. For optimal performance, we recommend prepainted steel sheets with a proper match between the organic coating, metallic coating, and base metal, selected according to the intended building occupancy and service life.
Prepainted steel sheet is manufactured from hot-dip galvanized steel or zinc-aluminized substrate, which undergoes surface degreasing, phosphating, and chromate treatment, followed by application and baking of an organic coating. Common coating types include polyester (PE), silicon-modified polyester (SMP), high-durability polyester (HDP), and fluorocarbon (PVDF). Among these, HDP and PVDF are particularly suitable for cleanroom environments due to their excellent weatherability, corrosion resistance, and low dust adhesion.
For structural and general use, typical Chinese grades include TDC51D, TS280GD, TS300GD, TS350GD, and TS550GD. The coating system is generally applied as two coats and two bakes, with a front coating thickness of at least 20 μm and a back coating of 5–12 μm. Relevant standards include GB/T 12754-2006 (China), ASTM A755/A792 (USA), EN 10169 (Europe), JIS G3322 (Japan), and KS D3506 (South Korea).
product key technologies
Coating type and thickness
Pencil hardness and gloss
T-bend and reverse impact resistance
Mechanical properties (yield strength, tensile strength, elongation)
Corrosion resistance (salt spray test)
Resistance to fading and chalking
Anti-dust adhesion performance
Special attention should be given to salt spray resistance (≥500 hours without red rust), anti-chalking rating (ASTM D4214 ≤1), and anti-dust adhesion (contact angle ≥90°). By following these guidelines, VCLEAN® Series modular clean panels can deliver reliable, long-lasting performance in ISO 5 to ISO 8 cleanroom environments.
In summary, for VCLEAN® Series modular clean panels, we recommend using prepainted steel sheets with a high-durability polyester (HDP) or fluorocarbon (PVDF) coating, a structural-grade substrate such as TS350GD or TS550GD, and a minimum front coating thickness of 20 μm. Special attention should be paid to salt spray resistance, anti-chalking, and anti-dust adhesion to ensure long-term stability in cleanroom applications.