Selective leaching corrosion


The process fluid selectively removes elements from the piping or any other component that might be exposed to the liquid flow. The mechanism is as follows:

  • Metals are removed from the liquid during a de-ionization or de-mineralizing process.
  • The liquid tries to replace the missing elements as it flows through the system.
  • The un-dissolved metals often coat themselves on the mechanical seal faces or the sliding components and cause a premature seal failure.
  • Heat accelerates the process.


De-ionized (DI) water, D009

Demineralized water, D010