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Surface Preparation
Corrosion Classes help determine the requirements for pre-treatment. Depends on indoor with relative humidity under 60%, non heated well ventilated room, fluctuating temperature and humidity, Outdoors in inland climates, far from the sea and industry, in densely populated areas or near industrial area, constant with high humidity near industrial manufacturing or utilizing chemicals are classified as the label of corrosion class
Assign Your products to the correct corrosion Class:
Corrosion classes help determine the requirement for pre-treatment
Corrosion Class 0 : indoors with relative humidity under 60% Very low corrosion risk (aggressively)
Corrosion Class 1 : indoors with non-heated, well ventilated room. low corrosion risk
Corrosion Class 2 : indoors with fluctuating temperature and humidity, outdoors in inland climates, far from the sea and industry Medium corrosion risk
Please find it on the following chart.
Cleaning/degreasing,Blast cleaning,Iron Phosphate,zinc phosphate and Chromate Treatment are recommended depend on the corrosion class. Please find it on the following chart.
Cleaning/degreasing,Blast cleaning,Iron Phosphate,zinc phosphate and Chromate Treatment are recommended depends on the corrosion class.
Corrosion Class 3 : Intensely populated areas or near industrial areas. in the vicinity of open water and near the coast. High corrosion risk
Corrosion Class 4 : constant, high humidity
near industry manufacturing or utilizing chemicals. Very high corrosion risk
Based on metal type and knowledge of corrosion class for product, the below tables suggest the pre-treatment options
| Recommended pre-treatment |
|
Can be used |
|
Not recommended/Inadequate |
|
Recommended-not always a prerequisite |
|
|
Pre-treatment of Galvanized steel |
|
Treatment type |
Corrosion Class |
| 0 |
1 |
2 |
3 |
4 |
| Cleaning I Degreasing |
|
| Blast cleaning |
| Iron phosphate treatment |
| Zinc phosphate treatment |
| Chromate treatment |
|
Pre-treatment of Iron and steal |
|
Treatment type |
Corrosion Class |
| 0 |
1 |
2 |
3 |
4 |
| Cleaning I Degreasing |
 |
| Blast cleaning |
| Iron phosphate treatment |
| Zinc phosphate treatment |
| Chromate treatment |
|
Pre-treatment of Aluminum |
|
Treatment type |
Corrosion Class |
| 0 |
1 |
2 |
3 |
4 |
| Cleaning I Degreasing |
 |
| Blast cleaning |
| Iron phosphate treatment |
| Zinc phosphate treatment |
| Chromate treatment |
|
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