Regina Fuchs-Godec (Author), Gregor Žerjav (Author)

Abstract

The inhibiting action of a non-ionic surfactant of the TRITON-X series (TRITON-X-100) on stainless steel type X4Cr13 in 1.0 M H2SO4 solution at five different temperatures was investigated by the potentiodynamic polarisation measurements. The inhibition efficiency has been calculated in the presence and in the absence of the inhibitor. The experimental data suggest that the inhibition efficiency increases with increasing concentration of the TRITON-X-100, and decreases with the increasing temperature. Adsorption of the non-ionic surfactant used here obeys the Flory- Huggins isotherm. The thermodynamic parameters, such as, the heat of adsorption, adsorption entropy, and the adsorption free energy, have been calculated by employing thermodynamic equations. Kinetic parameters, also been evaluated.

Keywords

fizikalna kemija;non-ionic surfactants;corrosion inhibitors;sulphuric acid;Flory-Huggins adsorption isotherm;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: Slovensko kemijsko društvo
UDC: 620.193.4:544
COBISS: 13053718 Link will open in a new window
ISSN: 1318-0207
Views: 1550
Downloads: 70
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Other data

Secondary language: Slovenian
Secondary abstract: S klasično potenciodinamsko metodo smo proučevali inhibitorski vpliv neionskega surfaktanta iz serije TRITON-X (TRITON-X-100) na feritno nerjavno jeklo X4Cr13 v 1 M raztopini žveplove VI. kisline pri temperaturah 25, 30, 35, 40, in 50 °C. Eksperimentalni podatki kažejo, da inhibicijska učinkovitost sicer narašča z naraščajočo koncentracijo, istočasno pa se začne zniževati z naraščajočo temperaturo. Izbrani neionski surfaktant se na površino kovine adsorbira v skladu s Flory–Huggins-ovo adsorpcijsko izotermo. Ocenili smo kinetične parametre, z uporabo termodinamskih enačb pa smo izračunali še klasične termodinamske parametre (∆G$_{ads}$, ∆H$_{ads}$ in ∆S$_{ads}$).
Secondary keywords: fizikalna kemija;neionske površinsko aktivne snovi;inhibitorji korozije;žveplova kislina;adsorpcijska izoterma Flory-Huggins;
URN: URN:NBN:SI
Type (COBISS): Scientific work
Pages: str. 78-85
Volume: ǂVol. ǂ56
Issue: ǂno. ǂ1
Chronology: 2009
Keywords (UDC): applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;materials testing;commercial materials;power stations;economics of energy;preiskava materiala;blagoznanstvo;energetske centrale;energetika;mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;physical chemistry;fizikalna kemija;
ID: 990863