Choosing the right product / Surface treatment
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Surface treatment |
Verification/testing
Surface treatment is checked regularly as part of our acceptance inspection. The zinc layer is checked for each batch using our own measuring equipment. In addition, accelerated corrosion tests, such as salt, spray and Kesternich tests, are performed by independent testing facilities, in order to maintain consistently high quality. We do our own field testing.
Screw |
|
| Material |
Surface treatment |
Corrosivity class |
| Carbon steel |
Bright zinc-plating 12µm + chrome-plating Fe/Zn 12c1 or Spex® |
C1 |
| |
Bright zinc-plating 12μm + chrome-plating Fe/Zn 12c1 + painting |
C1(C2) |
| |
Bright zinc-plating 25µm +chrome-plating Fe/Zn 25c1 + painting |
C2(C3) |
| Aluminium |
White pickling |
C4 |
| Stainless steel Marutex® |
Wax treatment |
C4 |
| Stainless steel-A2 |
Wax treatment |
C4 |
Nails |
|
| Product |
Material |
Surface treatment |
Corrosivity class |
| Tin nails |
Carbon steel |
Bright zinc-plating 30µm + chrome-plating (+ painting) |
C2 (C3) |
| |
Copper |
- |
C4 |
| |
Stainless steel-A2 |
Bright |
C4 |
| Clasp nails |
Carbon steel |
Hot-dip galvanising 50µm |
C4 |
| |
Stainless steel-A2 |
Bright |
C4 |
Sealing washers |
|
| Material |
Surface treatment |
Corrosivity class |
| Steel |
Hot-dip galvanising min. 25µm (+ painting) |
C2 (C3) |
| Aluminium |
White pickling |
C4 |
| Stainless steel |
Bright |
C4 |
