Influence of substrate microstructure on hydroxyapatite coating and corrosion behavior of coated Mg-Zn alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27690%2F21%3A10249174" target="_blank" >RIV/61989100:27690/21:10249174 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0257897221005880?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0257897221005880?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2021.127414" target="_blank" >10.1016/j.surfcoat.2021.127414</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of substrate microstructure on hydroxyapatite coating and corrosion behavior of coated Mg-Zn alloys

Popis výsledku v původním jazyce

Hydroxyapatite (HAp) coatings were formed on as-cast and T4-treated Mg-xZn (x = 1, 5, and 7 wt%) alloys by a chemical solution deposition method. The uniformity of HAp coatings showed an enhancement with finer particle size and lower volume fraction of (alpha-Mg + MgZn) eutectic cells and Zn-segregated regions. The Mg-1Zn sample showed a defect-free HAp coating, while the HAp coating of the Mg-7Zn sample showed cracks preferentially over the eutectic cells causing micro-galvanic corrosion with the matrix. Initially, the corrosion rate of the HAp-coated alloys was governed by the uniformity of HAp coating, and eventually it was dominated by the corrosion resistance of substrate alloys after the HAp coatings irreversibly broken. Ultimately, the volume fraction and size of (alpha-Mg + MgZn) eutectic cells and Zn-segregated regions governed the corrosion behavior of the HAp-coated Mg-Zn alloys. The HAp-coated Mg-1Zn alloy showed 2-4 times lower corrosion rate than other alloys after 1 day and 4-10 times after 14 days of immersion. The 14-day average corrosion rate of the as-cast Mg-1, 5, and 7Zn alloys decreased by 45%, 5% and 15% with the HAp coatings, respectively. The polarization resistance (Rp) of the as-cast Mg-1, 5, and 7 Zn alloys increased by 10, 7.5 and 5 times with the HAp coatings, respectively. Consequently, the HAp coating effectively improved the corrosion resistance of Mg-Zn alloys with low volume fraction of (alpha-Mg + MgZn) eutectic cells.

Název v anglickém jazyce

Influence of substrate microstructure on hydroxyapatite coating and corrosion behavior of coated Mg-Zn alloys

Popis výsledku anglicky

Hydroxyapatite (HAp) coatings were formed on as-cast and T4-treated Mg-xZn (x = 1, 5, and 7 wt%) alloys by a chemical solution deposition method. The uniformity of HAp coatings showed an enhancement with finer particle size and lower volume fraction of (alpha-Mg + MgZn) eutectic cells and Zn-segregated regions. The Mg-1Zn sample showed a defect-free HAp coating, while the HAp coating of the Mg-7Zn sample showed cracks preferentially over the eutectic cells causing micro-galvanic corrosion with the matrix. Initially, the corrosion rate of the HAp-coated alloys was governed by the uniformity of HAp coating, and eventually it was dominated by the corrosion resistance of substrate alloys after the HAp coatings irreversibly broken. Ultimately, the volume fraction and size of (alpha-Mg + MgZn) eutectic cells and Zn-segregated regions governed the corrosion behavior of the HAp-coated Mg-Zn alloys. The HAp-coated Mg-1Zn alloy showed 2-4 times lower corrosion rate than other alloys after 1 day and 4-10 times after 14 days of immersion. The 14-day average corrosion rate of the as-cast Mg-1, 5, and 7Zn alloys decreased by 45%, 5% and 15% with the HAp coatings, respectively. The polarization resistance (Rp) of the as-cast Mg-1, 5, and 7 Zn alloys increased by 10, 7.5 and 5 times with the HAp coatings, respectively. Consequently, the HAp coating effectively improved the corrosion resistance of Mg-Zn alloys with low volume fraction of (alpha-Mg + MgZn) eutectic cells.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/EF17_049%2F0008441" target="_blank" >EF17_049/0008441: Inovativní léčebné metody pohybového aparátu v úrazové chirurgii</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Surface &amp; Coatings Technology

ISSN

0257-8972

e-ISSN

—

Svazek periodika

421

Číslo periodika v rámci svazku

421

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

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Kód UT WoS článku

000666583900047

EID výsledku v databázi Scopus

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