Aljana Petek (Avtor), Sebastijan Kovačič (Avtor)

Povzetek

The corrosion resistance of AISI 420 stainless steel in 0.1 mol $L^{−1}$ $H_2SO_4$ + 0.1 mol $L^{−1}$ $Na_2SO_4$ solutions at different pH-values and the inhibiting effect of $Ce^{3+}$ ions was studied using electrochemical polarization methods. The results reveal decreasing of the corrosion rate with an increasing the pH of the solution, which demonstrates the progressive protective character of the inhibitor used. At pH lower than 3.33, the corrosion inhibition was most probably a result of the competitive adsorption of $Ce^{3+}$ with $H^+$ ions on the cathodic sites of the electrode surface, and it was found to be dependent on the relative concentration of $H^+$/$Ce^{3+}$. The peroxide generated from the oxygen reduction reaction at pH 3.33 was found to be capable oxidize trivalent cerium (Ce) to the tetravalent state. As obtained hydroxide precipitates act as diffusion barrier hindering the corrosion processes, whereafter a spontaneous passivity occurs on the steel surface at this pH.

Ključne besede

acid corrosion;green corrosion inhibitor;stainless steel;electrochemical techniques;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 665.7.038.5
COBISS: 18054678 Povezava se bo odprla v novem oknu
ISSN: 1751-8253
Št. ogledov: 858
Št. prenosov: 296
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: Slovenski jezik
Sekundarne ključne besede: kislostna korozija;zeleni inhibitor za korozijske procese;nerjaveče jeklo;elektrokemijske tehnike;
URN: URN:SI:UM:
Vrsta dela (COBISS): Znanstveno delo
Strani: str. 337-341
Letnik: ǂVol. ǂ7
Zvezek: ǂno. ǂ4
Čas izdaje: 2014
DOI: 10.1080/17518253.2014.952684
ID: 10850641