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Title:Nucleation and growth of a passive film on AISI 420 martensitic stainless steel under potentiostatic conditions
Authors:Fuchs-Godec, Regina (Author)
Petek, Aljana (Author)
Doleček, Valter (Author)
Files:.pdf Acta_Chimica_Slovenica_2002_Fuchs-Godec,_Petek,_Dolecek_Nucleation_and_growth_of_a_passive_film_on_AISI_420_martensitic_stainless_steel.pdf (562,40 KB)
MD5: 2FCF40AF5ABB0B46ECD6845F33B34B6F
 
URL http://acta-arhiv.chem-soc.si/49/49-1-139.pdf
 
Language:English
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:The kinetics of the early stage s of passive film formation on AISI stainless stell in mixtures of 0.1M ▫$H_2SO_4$▫ and 0.1M ▫$Na_2SO_4$▫, with pH-values of 2.42, 2.85 and 3.33, were studied at different anodic potentials. The potentiostatic step method was used as an electrochemical technique in which the anodic current density was measured as a function of time. For analysis of the measured data, the theory of "topochemical reaction" was applied for the charcterization of the exponent n in that part where the steepest current decay was observed. Through this theory, which includes the Erofeev equation, the number of conversion steps could be obtained, as well as the number of directions in which the nuclei grow. It was found that this theory can be successfully applied to the passivation process of AISI 420 stainles steel.
Keywords:corrosion, corrision resistance, martensitic stainless steels, passive films, potentiostatic step method, topochemical reactions
Year of publishing:2002
Number of pages:str. 139-148
Numbering:št. 1, Letn. 49
ISSN:1318-0207
UDC:620.193
ISSN on article:1318-0207
COBISS_ID:6971158 New window
NUK URN:URN:SI:UM:DK:SNKOLBLP
Views:943
Downloads:60
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Categories:Misc.
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Record is a part of a journal

Title:Acta Chimica Slovenica
Shortened title:Acta Chim. Slov.
Publisher:Slovensko kemijsko društvo
ISSN:1318-0207
COBISS.SI-ID:14086149 New window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
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:10.07.2015

Secondary language

Language:Slovenian
Title:Zgodnja faza nastanka pasivne plasti na AISI 420 nerjavnem jeklu pod potenciostatičnimi pogoji
Abstract:V prispevku smo obravnavali kinetiko pasivacije martenzitnega jekla AISI 420 v modelnem mediju. Kot korodirni medij smo izbrali mešanico raztopin 0,1 M $H_2SO_4$ in 0,1 M $Na_2SO_4$ različnih pH-vrednosti (2.42, 2.85 in 3.31). Študija je bila osredotočena na zgodnjo fazo nastanka pasivne plasti izbranega jekla. Uporabljena metoda za elektrokemijska merjenja je bila potenciostatska metoda, pri kateri smo merili tok kot funkcijo časa. Za analizo eksperimentalnih podatkov v področju najstrmejšega padca toka smo uporabili teorijo »topokemijskih reakcij«, ki vključuje Erofeevo enačbo. Dobljeni rezultati kažejo na dobro ujemanje z uporabljeno teorijo.
Keywords:korozija, korozijska odpornost, martenzitna nerjavna jekla, pasivni film, potenciostatična koračna metoda, topokemijske reakcije


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