effect of surface condition and water cleanliness

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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.

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