Research Status of Ionic Liquid Corrosion Inhibitors

Abstract

With the increasing awareness of environmental protection around the world, the green corrosion protection technology is becoming more and more important. Tonic liquid corrosion inhibitors are getting more and more attention from scholars. In this paper, the types, development history and research status of ionic liquid corrosion inhibitors were reviewed. The application of quantum chemical calculation and molecular dynamics simulation in the field of ionic liquid corrosion inhibitor was studied. And the corrosion inhibition mechanisms of such inhibitors were summerized. The ionic liquid corrosion inhibitors can inhibit the anodic and cathodic processes of corrosion reactions, and both physical adsorption and chemisorption occur. However, current simulation methods focus on analyzing the activity of molecules and the adsorption configuration in pure water. The interaction between the corrosion inhibitor molecules and other particles is not considered. The simulated environments are quite different from the actual ones, and there is no simulation method to explain the physical and chemical adsorption processes of corrosion inhibitors. In all, the ionic liquid corrosion inhibitors will develop in the direction of increasing corrosion inhibition performance on the basis of environmental protection, but there are still certain limitations with regard to the explanation of mechanism.

Keywords

• ionic liquid|green corrosion inhibitor|corrosion|adsorption mechanism|molecular dynamics|density functional theory