| Title: | Inhibitory effect of non-ionic surfactants of the TRITON-X series on the corrosion of carbon steel in sulphuric acid |
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| Authors: | ID Fuchs-Godec, Regina (Author) |
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| Files: |  http://dx.doi.org/doi:10.1016/j.electacta.2007.01.075
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| Language: | English |
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| Work type: | Unknown |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | The corrosion inhibition characteristics of non-ionic surfactants of the TRITON-X series, known as TRITON-X-100 and TRITON-X-405, on stainless steel (SS) type X4Cr13 in sulphuric acid were investigated by potentiodynamic polarisation measurements. It was found that these surfactants act as good inhibitors of the corrosion of stainless steel in 2 mol L-1 H2SO4 solution, but the inhibition efficiency strongly depends on the electrode potential. Thepolarisation data showed that the non-ionic surfactants used in this study acted as mixed-type inhibitors and adsorb on the stainless steel surface, in agreement with the Flory-Huggins adsorption isotherm. Calculated Gads values are -57.79 kJ mol-1 for TRITON-X-100, and -87.5 kJ mol-1 for TRITON-X-405. From the molecular structure it can be supposed that these surfactants adsorb on the metal surface through two lone pairs of electrons on the oxygen atoms of the hydrophilic head group, suggesting a chemisorption mechanism. |
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| Keywords: | electrochemistry, corrosion inhibitors, non-ionic surfactants, Flory-Huggins isotherm, critical micelle concentration, sulphuric acid |
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| Year of publishing: | 2007 |
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| PID: | 20.500.12556/DKUM-27472  |
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| UDC: | 541.183:620.1 |
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| ISSN on article: | 0013-4686 |
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| COBISS.SI-ID: | 11144726 |
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| NUK URN: | URN:SI:UM:DK:NO43OUAA |
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| Publication date in DKUM: | 01.06.2012 |
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| Views: | 2370 |
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| Downloads: | 110 |
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| Metadata: |    |
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| Categories: | Misc.
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