Ionic Liquids as Corrosion Inhibitors: Fid-Bau Portal

Ionic Liquids as Corrosion Inhibitors

Aslam, Ruby / Mobin, Mohammad / Aslam, Jeenat

Metallic corrosion is one of the most complex and destructive phenomena linked with tremendous economic and safety losses. During some industrial cleaning processes, the corrosion damage becomes more serious where metallic materials are required for processing and applications for their surface treatment. Therefore, during these processes, corrosion inhibitors, often organic compounds, are used to reduce corrosion damage. The inhibitory action of almost all of the inhibitors tested is associated with the presence of heteroatoms (N, S, O, P, etc.), aliphatic chains, and aromatic rings in their molecular structure. Organic inhibitors typically adsorb and create protective films that separate the metal(s) from the corrosive environment and therefore protect the metal from corrosion. Corrosion studies have widely focused on targeting the use of inexpensive, low‐ or non‐negative environmental molecules to replace environmentally unfriendly compounds. Presently, tailored ionic liquids (ILs) tested as corrosion inhibitors are said to play an important role in improving the inhibition efficiency of metals and alloys. The high inhibition properties of ILs, including their pH stability, low toxicity, economical preparation, low volatility (accounting for its low tendency of contaminating the environment), and high chemical and thermal stability characteristics are better than conventional inhibitors. A variety of literature has recently been available on the investigation of ILs based on imidazole, pyridinium, and their derivatives as corrosion inhibitors for various metals in aggressive media. Much of the contribution made in the literature on the use of ILs as a modern advanced corrosion inhibitor concerns current interest.