Počet záznamů: 1
Unconventional fluoride conversion coating preparation and characterization
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SYSNO ASEP 0481439 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Unconventional fluoride conversion coating preparation and characterization Tvůrce(i) Drábiková, J. (CZ)
Fintová, Stanislava (UFM-A) ORCID
Tkacz, J. (CZ)
Doležal, P. (CZ)
Wasserbauer, J. (CZ)Celkový počet autorů 5 Zdroj.dok. Anti-Corrosion Methods and Materials - ISSN 0003-5599
Roč. 64, č. 6 (2017), s. 613-619Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova fluoride conversion coating ; magnesium ; corrosion Vědní obor RIV JK - Koroze a povrchové úpravy materiálů Obor OECD Coating and films Institucionální podpora UFM-A - RVO:68081723 UT WOS 000416439300006 EID SCOPUS 85036638610 DOI 10.1108/ACMM-02-2017-1757 Anotace The purpose of this paper is to compare electrochemical corrosion characteristics of conventional and unconventional fluoride conversion coating prepared on magnesium alloy. The chemical reaction of AZ61 with 38 wt. % hydrofluoric acid (HF) for 24 h was used as a conventional way of fluoride conversion coating preparation. The unconventionally prepared coating was created in Na[BF4] salt melt at 450 °C for 2 h. Morphology and chemical composition of prepared fluoride conversion coatings were studied with scanning electron microscopy and energy-dispersive X-ray spectroscopy. Electrochemical corrosion characteristics of the coatings were analyzed in Hank's solution using potentiodynamic tests. Both the coating preparation ways resulted in a creation of uniform conversion coatings with the same thickness (1.3 ± 0.1 um). Some defects were observed on the coatings surface, however, the defects did not reach the AZ61 surface. Electrochemical tests performed in Hank's solution at 37 °C showed an improvement of corrosion resistance of AZ61 treated with fluoride conversion coatings when compared to the untreated material. Unconventionally prepared coating reached better electrochemical corrosion characteristics when compared to the conventionally prepared coating. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2018
Počet záznamů: 1