Imidazolium based ionic liquid derivatives; synthesis and evaluation of inhibitory effect on mild steel corrosion in hydrochloric acid solution

Abstract

Imidazolium bearing ionic liquids (ILs), 3-hexadecyl-1-methyl-1H-imidazol-3-ium bromide [C 16 M 1 Im] [Br] and 3hexadecyl-1,2-dimethyl-1H-imidazol-3-ium bromide [C 16 M 2 Im] [Br] have been synthesized. These compounds were evaluated for corrosion resistance of mild steel in 1M HCl solution by gravimetric and electrochemical studies. The results were noticed that the inhibition efficiency, has enhanced due to a rise in the concentration of inhibitor. Further, it is observed that [C 16 M 2 Im] [Br] inhibition efficiency better than [C 16 M 1 Im] [Br] due to the increased alkyl substituents. Polarization study reveals that the used inhibitors behave as a mixed type, but predominantly exhibited the anodic inhibitive effect. The inhibitors adsorbed on the metal surface obeys Langmuir adsorption isotherm. Surface topography examined using an Atomic Force Microscope (AFM) and a Scanning Electron Microscope (SEM) with EDAX analyses. The formation of the Fe-inhibitor complex on mild steel surface has been confirmed by UV-Visible spectroscopy.

Selective Aerobic Oxidation of Toluene in the Presence of Co2+ and Task-Specific Organic Salts, Including Ionic Liquids

“…Therefore, the organic bromide salts exhibit a corrosion inhibition effect and they may be considered as corrosion inhibitors for the studied steels. The beneficial, inhibiting effects of organic ammonium bromides and imidazolium-based bromides have also been observed in the case of other materials, e.g., cetyltrimethylammonium bromide 37 or [C 16 MxIm][Br] imidazolium-based ILs 38 and mild steels, as well as with hexadecyltrimethylammonium bromide and brasses. 39 The results obtained by the immersion method are in good accordance with the visual observations and the microscopic studies.…”

Synthesis of 1,8-Naphthyridines by the Ionic Liquid-Catalyzed Friedlander Reaction and Application in Corrosion Inhibition

“…Perhaps, this was due to the competitive adsorption of inhibitor molecules on the metal surface. Compared to the previous literature, [1,8-Nap]­[CETSA] and other corrosion inhibitors, such as choline-based and imidazolium-based ILs, showed excellent corrosion inhibition ability at high concentration, but [1,8-Nap]­[CETSA] exhibited better inhibition efficiency when it was at low concentration. − This proves that [1,8-Nap]­[CETSA] ILs have significant application potential in the corrosion protection field.…”

“…It can be seen from Table that the inhibition efficiency increased with the increase of [1,8-Nap]­[CETSA] and reached up to 96.95% when the concentration was 1 mM; probably, inhibitor molecules adsorbed on the Q235 steel’s surface and excluded the corrosion media. Meanwhile, the inhibitor could affect either or both metal dissolution and hydrogen evolution processes . However, with the concentration of [1,8-Nap]­[CETSA] continuously increasing, the inhibition efficiency decreased slightly.…”

“…Meanwhile, the inhibitor could affect either or both metal dissolution and hydrogen evolution processes. 39 However, with the concentration of [1,[CETSA] continuously increasing, the inhibition efficiency decreased slightly. Perhaps, this was due to the competitive adsorption of inhibitor molecules on the metal surface.…”

Organic Compounds as Corrosion Inhibitors for Carbon Steel in HCl Solution: A Comprehensive Review

“…The following supporting information can be downloaded at: , cite Refs. [ 254 , 255 , 256 , 257 , 258 , 259 , 260 , 261 , 262 , 263 , 264 , 265 , 266 , 267 , 268 , 269 , 270 , 271 , 272 , 273 , 274 , 275 , 276 , 277 , 278 , 279 , 280 , 281 , 282 , 283 , 284 , 285 , 286 , 287 , 288 , 289 , 290 , 291 , 292 , 293 , 294 , 295 , 296 , 297 , 298 , 299 , 300 , 301 , 302 , 303 , 304 , 305 , ...…”