Imidazolium-based ionic liquids as corrosion inhibitors for stainless steel in different corrosive media: An overview

Isothiourea-Terminated Pentaerythritol Core Dendrimers as Highly Efficient Corrosion Inhibitors for Carbon Steel in Soft Water

“…The results from Table 1 show that the corrosion potential of carbon steel after adding PETA/8ITU-1G and PETA/4ITU-0G shifts less than 85 mV, 52 indicating that both PETA/4ITU-0G and PETA/8ITU-1G were mixed-type inhibitors. 53 These results revealed that the addition of PETA/4ITU-0G and PETA/8ITU-1G formed a dense protective film on the surface of the carbon steel to inhibit the corrosion process. 54 The higher the concentration, the denser the protective film.…”

“…As shown in Figure and Table , with increasing concentration of inhibitors, PETA/4ITU-0G and PETA/8ITU-1G decreased the corrosion current density ( i corr ), and potentiodynamic polarization curves move toward low current density compared with the blank group, resulting in an increase in η p . The results from Table show that the corrosion potential of carbon steel after adding PETA/8ITU-1G and PETA/4ITU-0G shifts less than 85 mV, indicating that both PETA/4ITU-0G and PETA/8ITU-1G were mixed-type inhibitors . These results revealed that the addition of PETA/4ITU-0G and PETA/8ITU-1G formed a dense protective film on the surface of the carbon steel to inhibit the corrosion process .…”

Imidazolium-Based Polymeric Ionic Liquids with Short Alkyl Chains as Green Corrosion Inhibitors for Mild Steel in 1 M HCl: Experimental and Theoretical Investigations

“…For DBA, the comonomer of PDBA-IL-NH 2 and PDBA-IL-OH, both LUMO and HOMO distribute evenly on the benzene ring, which indicates that it serves as the adsorption center. , Many studies demonstrated that π-electrons in the benzene ring could facilitate the formation of coordination bonds between the inhibitor and Fe . For IL-NH 2 and IL-OH, the distribution of HOMO on the amine and hydroxyl groups suggests that they are predisposed to donate electrons to the unoccupied d-orbital of Fe, and the imidazole ring can act as an electron acceptor from Fe, which can be reflected by the LUMO distributed on the imidazole ring.…”

“…16 Therefore, imidazolium-based ILs with short alkyl chains should be preferred for designing green and efficient corrosion inhibitors. Unfortunately, the concentration of inhibitors with relatively low molecular weight is usually quite high, 17 which may be solved by the employment of polymeric ILs with distinctive structural features. Polymers could form single or multiple layers of dense protective films on metal surfaces to replace more adsorbed water and enhance the inhibition effect.…”

“…Therefore, imidazolium-based ILs with short alkyl chains should be preferred for designing green and efficient corrosion inhibitors. Unfortunately, the concentration of inhibitors with relatively low molecular weight is usually quite high, which may be solved by the employment of polymeric ILs with distinctive structural features.…”