New, environmentally friendly, rare earth carboxylate corrosion inhibitors for mild steel
| Autor: | Anthony Somers, Maria Forsyth, Caspar N. de Bruin-Dickason, Peter C. Junk, Bruce Hinton, Glen B. Deacon |
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| Rok vydání: | 2018 |
| Předmět: |
Chemistry
General Chemical Engineering Rare earth Infrared spectroscopy 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Environmentally friendly 0104 chemical sciences Corrosion chemistry.chemical_compound General Materials Science Carboxylate Thin film Fourier transform infrared spectroscopy 0210 nano-technology Corrosion current density Nuclear chemistry |
| Zdroj: | Corrosion Science. 139:430-437 |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2018.05.017 |
| Popis: | Four recently synthesized rare earth 3-(4-methylbenzoyl)propanoate (mbp) compounds (RE = La, Ce, Nd and Y) were evaluated as corrosion inhibitors for mild steel in 0.01 M NaCl. At a concentration of 0.25 mM all the compounds showed some level of inhibition after 30 min immersion, with the Y(mbp)3 complex giving the largest reduction in corrosion current density, from 1.92 μA/cm2 for the control sample to 0.25 μA/cm2 for the Y based inhibitor. All the RE(mbp)3 inhibitors acted predominantly as anodic inhibitors, showing little effect on the cathodic reaction after 30 min. Surface analysis after 6 h immersion using FTIR and EDS detected the presence of a thin film containing inhibitor components on all surfaces, thus accounting for the reduced corrosion rate, with the Y(mbp)3 compound having the most significant effect on corrosion and showing the most uniform surface coverage. |
| Databáze: | OpenAIRE |
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