Inhibition
Inhibition of corrosion involves the addition of a chemical
species into the service environment which results in a reduction
in the rate of corrosion of the material(s) used in construction.
Effective chemical inhibition is usually obtained through one of
the following processes:
- Filming of the surface by inorganic molecules.
- Reaction or removal of corrosive species in the
environment.
- Control of electrochemical potential of the material.
Care should be taken to prevent unexpected results from the
use of inhibitors which can, in some cases:
- Increase general or pitting corrosion rates of some
alloys.
- Produce incompatibility of inhibitors with wither
metallic and non-metallic materials in the system.
- Promote fouling, emulsions, environmental or other
problems not directly related to corrosion.
