Regina Fuchs-Godec (Avtor)

Povzetek

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.

Ključne besede

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;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 541.183:620.1
COBISS: 11144726 Povezava se bo odprla v novem oknu
ISSN: 0013-4686
Št. ogledov: 1580
Št. prenosov: 90
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarne ključne besede: elektrokemija;korozijski inhibitorji;neionske površinsko aktivne snovi;Flory-Hugginsova izoterma;kritična micelna koncentracija;korozijski kinetični parametri;žveplova (VI) kislina;
URN: URN:SI:UM:
Strani: str. 4974-4981
Letnik: ǂVol. ǂ52
Zvezek: ǂiss. ǂ15
Čas izdaje: Apr. 2007
ID: 8718656