20.500.12556/DKUM-27529 An effect of sodium dodecylsulfate on the corrosion of copper in sulphuric acid media A effect of sodium dodecylsulfate on the corrosion of copper in sulphuric acid media The effect of sodium dodecylsulfate (SDS) on copper corrosion in a solution of 0.5 M H2SO4 + x M SDS was studied using electrochemical polarisation measurements. The critical micelle concentration (CMC) of SDS in 0.5 M H2SO4 is 8 * 10-4 M, and the experimental concentrations of SDS were in the range below and above the CMC. It was found that SDS is a good anodic inhibitor at lower anodic overpotentials, i.e. very close to the rest potential. Adsorptionof the inhibitor obeys the Langmuir isotherm. Plots of log [▫$theta$▫/(1-▫$theta$▫)] versus log ▫$c_{inh}$▫ yielded straight lines with a slope change at the CMC. Accordingly, the CMC could be determined from these electrochemical measurements. The values of ▫$Delta$▫▫$G_{ads}$▫ calculated from the Langmuir plots are negative, suggesting that the inhibitive action of SDS in 0.5 M H2SO4 results from the electrostatic adsorption of C12H25SO4- ions onto the positively charged copper surface. electrochemistry corrosion inhibitors surfactants potentiodynamic polarisation corrosion kinetic parameters copper Langmuir isotherm critical micelle concentration sulphuric acid elektrokemija korozijski inhibitorji površinsko aktivne snovi potenciodinamska polarizacija baker Langmuirjeva izoterma kritična micelna koncentracija korozijski kinetični parametri žveplova (VI) kislina true false false Angleški jezik Angleški jezik Neznano 2012-06-01 11:36:00 2012-06-01 11:36:00 2022-04-15 03:45:07 2019-07-10 12:18:41 2004 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 541.183 8985110 0927-7757 URN:SI:UM:DK:FCW2LLKG http://dx.doi.org/10.1016/j.colsurfa.2004.05.015 1 https://dk.um.si/Dokument.php?lang=slv&id=36830 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0