Surface Protection Plus, our extended testing procedure, tests materials at system level. In other words, the entire product, rather than just the individual part, undergoes testing in the relevant application spectrum.
- Geometric influences are also taken into account
- Testing with real test media
- Optimum material selection and combination
- Test procedure for corrosion protection (component-oriented and design-focused)
Dependency of corrosion on the local ambient conditions, e.g. corrosion rates with low-alloy steel :
| Average corrosion rates in μm/annum | |||
| North Sea | Mediterranean | Persian Gulf | |
| Atmosphere | 50-70 | ||
| Spray water zone | 140 | 140 | 190 |
| Alternating immersion zone | 80 | 50 | 50 |
| Low water zone | 210 | 160 | 130 |
| Permanent immersion zone | 30 | 40 | 40 |
| Sea bed | 20 | ||
According to standard regulations such as EN, IEC, ASTM
Pros: Identical scale, comparable
Cons: Purely component-based (e.g. sheet metals only)
- Testing at system level (complete product rather than individual parts)
- Geometry influences are also tested (edges, gaps, ..)
- Testing with real test media
Pros: Practical, optimum choice and combination of materials for the relevant application spectrum (coated steel, stainless steel, aluminium, zinc)
- Avoidance and sealing of gaps
- Suitable material pairings
- Organic coating wherever possible