Upon entering the surface treatment workshop, the 201 substrate gains ‘ocean-grade’ defence capabilities.
Pre-treatment employs zirconium salt chromium-free passivation, representing a compromise between environmental sustainability and performance. This is followed by electrostatic powder coating, with coating thickness controlled between 70-100μm—too thin offers insufficient protection, while excessive thickness risks cracking at bends.
We conduct rigorous cross-cut adhesion testing and 240-hour salt spray testing. Only cabinets achieving ISO grades 0-1 (less than 5% surface loss) with rust propagation ≤1mm at incisions proceed to subsequent stages.
