| Aluminum |
Cleaning and etching prior to Spot welding |
| | Clear Chromate conversion |
| | Yellow Chromate conversion TYPE I, II and III |
| | Clear Anodize |
| | Black Anodize
Type 2 and 3 |
| | Electroless Nickel |
| | Black Electro Nickel |
| Steel |
Zinc Phosphate coating |
| | Electro
Zinc plating with Clear Chromate |
| | Electro Zinc plating with
Yellow Chromate |
| Stainless Steel |
Passivation |
| |
Electro Polish |
