| Naslov: | An effect of sodium dodecylsulfate on the corrosion of copper in sulphuric acid media |
|---|
| Avtorji: | ID Fuchs-Godec, Regina (Avtor)
ID Doleček, Valter (Avtor) |
|---|
| Datoteke: |  http://dx.doi.org/10.1016/j.colsurfa.2004.05.015
|
|---|
| Jezik: | Angleški jezik |
|---|
| Vrsta gradiva: | Neznano |
|---|
| Tipologija: | 1.01 - Izvirni znanstveni članek |
|---|
| Organizacija: | FKKT - Fakulteta za kemijo in kemijsko tehnologijo
|
|---|
| Opis: | 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. |
|---|
| Ključne besede: | electrochemistry, corrosion inhibitors, surfactants, potentiodynamic polarisation, corrosion kinetic parameters, copper, Langmuir isotherm, critical micelle concentration, sulphuric acid |
|---|
| Leto izida: | 2004 |
|---|
| PID: | 20.500.12556/DKUM-27529  |
|---|
| UDK: | 541.183 |
|---|
| COBISS.SI-ID: | 8985110 |
|---|
| ISSN pri članku: | 0927-7757 |
|---|
| NUK URN: | URN:SI:UM:DK:FCW2LLKG |
|---|
| Datum objave v DKUM: | 01.06.2012 |
|---|
| Število ogledov: | 2063 |
|---|
| Število prenosov: | 113 |
|---|
| Metapodatki: |    |
|---|
| Področja: | Ostalo
|
|---|
|
:
|
Kopiraj citat |
|---|
| | | | Skupna ocena: | (0 glasov) |
|---|
| Vaša ocena: | Ocenjevanje je dovoljeno samo prijavljenim uporabnikom. |
|---|
| Objavi na: |  |
|---|
Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše
podrobnosti ali sproži prenos. |
