Definition: Corrosion (from Latin corrodere = “to decompose”) describes the reaction of usually a metallic material with substances from the environment. This creates a corrosion element. At the same time, a measurable change in the material occurs, usually with a negative change in its properties. In pumps, corrosion can occur in many different forms and includes both reactions with and without mechanical stress. Examples are
  • surface corrosion,
  • pitting corrosion,
  • erosion and
  • cavitation.
In order to prevent corrosion in pumps, it is particularly important to consider the properties of the medium to be pumped when selecting the material of the pump components that come in contact with the medium. Pitting corrosion by chlorides can be avoided by using a molybdenum alloy or a plastic pump. The PUMPselector provides a wide range of available pumps that prevent corrosion in different ways.