Torich International Limited
We focus on Quality First, Quality Traceability, and Quality Stability! We focus on Customer First, People First, and Quality-Oriented!
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Zinc plating and PVF coating steel tubes for automotive
High density zinc plating will increase durability of tube surface and chromate passivation will delay the white corrosion appear.Trivalent chromate (Cr+3)passivation is also available for environmental reqquirement.PVF coating quality shall give a high resistance againest corrosive conditions,Nickel and Zinc plating and double coating PVF or PVDF are developig to meeting for customers' high qualitu requirement.
Sorts of Surface Treatment
Electrolyte Zinc Plating+Chromate Yellow
Electrolyte Zinc Plating+Chromate Olive
Electrolyte Zinc Plating+Chromate Olibe+PVF Olive Green
PVF: Ply vinyl fluoride
Tubes coating
Tubes + Chromating +zinc plating +PVF coating
Technical Specification of External Surface Treatment
| Treatment Layer | Thickness | Salt Spray Test (hours) | |
| White Rust | Red rust | ||
| Zinc | 8,13,25 | ＞70 | ＞192/240/280 |
| Chromate | ＜3 | ＞72 | ＞192/240/280 |
| PVF | ＞8,15,25 | ＞240 | ＞3000 |
