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Projects / Programmes source: ARIS

The study of phenomena on metal surfaces with emphasis on physicochemical properties of surface layers

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Research activity

Code Science Field Subfield
2.04.00  Engineering sciences and technologies  Materials science and technology   

Code Science Field
T150  Technological sciences  Material technology 
Keywords
corrosion, steel, electrochemical noise, chemical sensor
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (5)
no. Code Name and surname Research area Role Period No. of publications
1.  06127  PhD Darinka Brodnjak-Vončina  Chemistry  Researcher  1996 - 2001  617 
2.  00869  PhD Valter Doleček  Chemistry  Head  1996 - 2001  382 
3.  18236  Igor Gros    Researcher  1998 - 2001  5 
4.  08264  PhD Aljana Petek  Chemistry  Researcher  1999 - 2001  203 
5.  10727  PhD Mojca Slemnik  Chemistry  Researcher  2000 - 2001  119 
Organisations (1)
no. Code Research organisation City Registration number No. of publications
1.  0794  University of Maribor, Faculty of Chemistry and Chemical Engineering  Maribor  5089638012  13,286 
Abstract
Characteristics of electrochemical noise, generated by different types of corrosion, have been examined on the electrode surface of stainless steel AISI 302 under tensile load, in aqueous solutions with different concentrations of NaCl and HCl, at higher temperatures. The optical microscope supported by a computer visualisation technique was used simultaneously during the test and compared with signals of electrochemical noise generated at the same time. In order to characterise the measured signals different mathematical methods in the frequency and phase domain have been used. It is concluded that the electrochemical noise measurements and analysis can distinguish between uniform corrosion and different types of localised corrosion. Breakdown of passive film, repassivation and growth of stable pits, can be detected. The initiation of cracks can be detected too. An usable sulphide ion selective electrode has been prepared by means of chemical pre-treatment of a silver wire with ammonium peroxodisulphate solution and the sulphidisation in an alkaline sulphide solution. The electrode is suitable for direct concentration measurements of sulphide ions down to micromolar quantities per litre.
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