effect of surface condition and water cleanlinessReading time:
The presence of pre-existing deposits in an old system or deposits caused by transfers of poorly processed water, can constitute a source of corrosion on two grounds :
- creating zones beneath the deposit that are not aerated and that generate anodic zones;
- zones that host the development of various strains of bacteria and of reducing reactions that cause passivation.
Stainless steels are particularly sensitive to this process.