Corrosion inhibitor for refrigeration systems

In practical application environments, the corrosion inhibition efficiency of inhibitors, regardless of the conditions affected, depends on the following factors:

① The adsorption force between the adsorbate molecules and the metal or corrosion product film;
② The adsorption rate or coverage on the metal surface, etc.;
③ The thickness of the protective film formed;
④ The density of the protective film.
To enable a small amount of inhibitor to fully exert high corrosion inhibition, there should be an appropriate "amphiphilic balance" between the polar and non-polar groups of the inhibitor molecules. That is, the polar groups can firmly adsorb on the metal surface, while the non-polar groups can effectively cover the entire metal surface.
During the application process, inhibitors are influenced by various factors, and different working conditions impose different requirements on all aspects of the inhibitor. The properties and structure of the inhibitor, the state of the metal surface, and the environmental medium all significantly impact the corrosion inhibition performance. Therefore, it is essential to first clarify the influence patterns of various factors on the efficacy of inhibitors to select the appropriate type of inhibitor for specific practical problems under different conditions.