No matter how the stainless steel is used, a certain degree of manufacturing is required. This may include cutting, bending, welding or grinding; however, no matter what we do, the corrosion resistance of the steel is affected.
When the stainless steel leaves the factory, it is “perfect”. From this moment, its corrosion resistance is at its best, and the vast majority of manufacturing processes affect the resistance in a negative way. Most processes will tend to weaken the corrosion resistance, and, consequently, all manufacturing should be performed in such a way that the negative effect is as small as possible. If this is not possible, the manufacturing should be followed by a chemical surface treatment (Chapter 7).