The role of β (Al₁₂Mg₁₇) phase on corrosion behavior of the AM90 alloy in NaCl aqueous solution

• Autorzy: Hatakeyama Masahiko , Shimada Yusuke , Kawate Naoki , Sarayama Kaede , Sunada Satoshi

Identyfikatory

DOI

10.24425/amm.2022.137815

• Języki publikacji: EN

Abstrakty

EN

The β phase (Al₁₂Mg₁₇) precipitated by heat treatment in some alloy compositions may result deterioration of corrosion resistance. However, much of its role remains unclear. The effect of the β phase on the corrosion resistance behavior in a NaCl solution was presented in this study. The specimen was Mg-9mass%Al (AM90) alloy and the content of the β phase precipitant was controlled systematically by aging time at 473 K. Area rate of β and lamellar phase in the specimens were 0, 10 and 100%, respectively. According to the results of cathodic polarization curves measurement, the corrosion current density of α phase was 0.215 A/m² and β phase of it was 0.096 A/m². While, the specimen includes 10% of β and lamellar phase showed large corrosion current density of 0.251 A/m². Positive correlation between the β phase and the open circuit potential, suggest that the β phase acts as a cathodic electrode. Moreover, the microstructure after postentiostatic corrosion tests was also support the role of β phase.

Słowa kluczowe

EN

magnesium; corrosion; light alloy

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2022
• Tom: Vol. 67, iss. 2
• Strony: 759--766
• Opis fizyczny: Bibliogr. 25 poz., fot., rys., tab.

Twórcy

autor

Hatakeyama Masahiko

• University of Toyama, Graduate School of Materials Science and Engineering for Research, 3190 Gofuku, Toyama 930-8555, Japan

• https://orcid.org/0000-0003-4823-4466

autor

Shimada Yusuke

• University of Toyama, Graduate School of Materials Science and Engineering for Education, Japan

• https://orcid.org/0000-0003-1902-6641

autor

Kawate Naoki

• University of Toyama, Graduate School of Materials Science and Engineering for Education, Japan

• https://orcid.org/0000-0001-9692-4192

autor

Sarayama Kaede

• University of Toyama, Graduate School of Materials Science and Engineering for Education, Japan

• https://orcid.org/0000-0001-6209-0601

autor

Sunada Satoshi

• University of Toyama, Graduate School of Materials Science and Engineering for Research, 3190 Gofuku, Toyama 930-8555, Japan

• https://orcid.org/0000-0001-8188-9021

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Uwagi

1. This study was financially supported by JSPS KAKENHI Grant Number JP 18K04774.

2. Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).