Environmentally friendly passivation technology

Chromium-free passivation (such as silane treatment) meets the RoHS directive.

Composite coating

Alu-Zn + PVDF coating (such as PPGL), weather resistance is improved to 30 years.

High reflective coating

Specialized for solar backplane (reflectivity ≥ 80%, improve power generation efficiency).

Selection and use suggestions

Coating selection

Coastal/industrial areas: AZ150 or above (high corrosion resistance).

Dry inland: AZ75-AZ100 (cost saving).

Processing Notes

After cutting, the edge needs to be sprayed with zinc-aluminum repair paint.

Avoid direct contact with copper and stainless steel (galvanic corrosion).

Frequently asked questions

Q1: Can aluminum-zinc plating replace stainless steel?

Some scenarios can: such as building roofs (the cost is only 1/3 of stainless steel), but chemical equipment still needs stainless steel.

Q2: How long is the service life of galvalume?

Ordinary environment: 25-30 years (coating AZ150).

Industrial area: 15-20 years (need to check the incision regularly).

Q3: How to identify inferior galvanized steel sheets?

Surface: uniform matte silver-gray, no zinc flower (galvanized steel sheets have zinc flower patterns).

Measure the coating: XRF spectrometer detects the aluminum-zinc ratio.