Regina Fuchs-Godec (Author)

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.

Keywords

elektrokemija;korozijski inhibitorji;neionske površinsko aktivne snovi;Flory-Hugginsova izoterma;kritična micelna koncentracija;korozijski kinetični parametri;žveplova (VI) kislina;electrochemistry;corrosion inhibitors;non-ionic surfactants;Flory-Huggins isotherm;critical micelle concentration;sulphuric acid;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
UDC: 541.183:620.1
COBISS: 11144726 Link will open in a new window
ISSN: 0013-4686
Views: 1580
Downloads: 90
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Other data

Secondary language: English
Secondary keywords: elektrokemija;korozijski inhibitorji;neionske površinsko aktivne snovi;Flory-Hugginsova izoterma;kritična micelna koncentracija;korozijski kinetični parametri;žveplova (VI) kislina;
URN: URN:SI:UM:
Pages: str. 4974-4981
Volume: ǂVol. ǂ52
Issue: ǂiss. ǂ15
Chronology: Apr. 2007
ID: 8718656