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Title:The influence of $Ce^{3+}$ ions on the corrosion rate of stainless steel in acidic solutions of different pH-values
Authors:Petek, Aljana (Author)
Kovačič, Sebastijan (Author)
Files:.pdf Green_Chemistry_Letters_and_Reviews_2014_Petek,_Kovacic_The_influence_of_Ce_3_ions_on_the_corrosion_rate_of_stainless_steel_in_acidic_so.pdf (463,32 KB)
MD5: ED283B9720E150A3BD331E6277D7AD2F
URL http://www.tandfonline.com/doi/abs/10.1080/17518253.2014.952684
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract: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.
Keywords:acid corrosion, green corrosion inhibitor, stainless steel, electrochemical techniques
Year of publishing:2014
Number of pages:str. 337-341
Numbering:št. 4, Letn. 7
ISSN on article:1751-8253
COBISS_ID:18054678 New window
DOI:10.1080/17518253.2014.952684 New window
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Record is a part of a journal

Title:Green Chemistry Letters and Reviews
Shortened title:Green Chem. Lett. Rev.
Publisher:Taylor & Francis Group
COBISS.SI-ID:24983079 New window


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:24.07.2017

Secondary language

Keywords:kislostna korozija, zeleni inhibitor za korozijske procese, nerjaveče jeklo, elektrokemijske tehnike


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