Unconventional fluoride conversion coating preparation and characterization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00481439" target="_blank" >RIV/68081723:_____/17:00481439 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26310/17:PU125185

Výsledek na webu

<a href="http://dx.doi.org/10.1108/ACMM-02-2017-1757" target="_blank" >http://dx.doi.org/10.1108/ACMM-02-2017-1757</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1108/ACMM-02-2017-1757" target="_blank" >10.1108/ACMM-02-2017-1757</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Unconventional fluoride conversion coating preparation and characterization

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Unconventional fluoride conversion coating preparation and characterization

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/LO1211" target="_blank" >LO1211: Centrum materiálového výzkumu na FCH VUT v Brně - udržitelnost a rozvoj</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Anti-Corrosion Methods and Materials

ISSN

0003-5599

e-ISSN

—

Svazek periodika

64

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

613-619

Kód UT WoS článku

000416439300006

EID výsledku v databázi Scopus

2-s2.0-85036638610