TY - GEN
T1 - Characterization of anodic oxide film on AZ91 magnesium alloy formed by plasma electrolytic oxidation
AU - Cahyeni, Miranda
AU - Anawati, Anawati
N1 - Funding Information:
This work was fully financed by Hibah Publikasi Internasional Terindeks untuk Tugas Akhir Mahasiswa B (PITTA-B) Universitas Indonesia with contract no. NKB-0610/UN2.R3.1/HKP.05.00/2019.
Publisher Copyright:
© 2020 Author(s).
PY - 2020/4/21
Y1 - 2020/4/21
N2 - The AZ91 magnesium (Mg) alloy is a high strength yet lightweight material, which is suitable properties for structural engineering application. However, the high surface reactivity of the alloy to a corrosive environment limits its extensive use. A barrier layer is necessary to reduce contact between the alloy and the environment. This paper reports the characteristics of a film formed on the AZ91 alloy by plasma electrolytic oxidation (PEO) in Na3PO4 solution at variation time of 30, 60, and 90 s. Surface characterization by SEM revealed that the formation of the PEO film was initiated at the β phase (30 s) and then expanded to the metal matrix (60 and 90 s). The film formed for 30 s was localized at β phase. At a prolonged time of 60 and 90 s, the film became more uniform with a thickness of approximately 2.5 and 5.0?μm, respectively. The film composed mainly amorphous Mg(OH)2 phase, as analyzed by XRD. The wear resistance, which was measured by abrasion test, showed that the film formed at the intermediate time of 60 s exhibited the highest abrasion rate of 3.22x10-4 mm3/Nm which was three times than that of the film formed at 30 and 90 s with abrasion rate of 1.35x10-4 and 1.47x10-4?mm3/Nm, respectively.
AB - The AZ91 magnesium (Mg) alloy is a high strength yet lightweight material, which is suitable properties for structural engineering application. However, the high surface reactivity of the alloy to a corrosive environment limits its extensive use. A barrier layer is necessary to reduce contact between the alloy and the environment. This paper reports the characteristics of a film formed on the AZ91 alloy by plasma electrolytic oxidation (PEO) in Na3PO4 solution at variation time of 30, 60, and 90 s. Surface characterization by SEM revealed that the formation of the PEO film was initiated at the β phase (30 s) and then expanded to the metal matrix (60 and 90 s). The film formed for 30 s was localized at β phase. At a prolonged time of 60 and 90 s, the film became more uniform with a thickness of approximately 2.5 and 5.0?μm, respectively. The film composed mainly amorphous Mg(OH)2 phase, as analyzed by XRD. The wear resistance, which was measured by abrasion test, showed that the film formed at the intermediate time of 60 s exhibited the highest abrasion rate of 3.22x10-4 mm3/Nm which was three times than that of the film formed at 30 and 90 s with abrasion rate of 1.35x10-4 and 1.47x10-4?mm3/Nm, respectively.
UR - http://www.scopus.com/inward/record.url?scp=85113491280&partnerID=8YFLogxK
U2 - 10.1063/5.0001484
DO - 10.1063/5.0001484
M3 - Conference contribution
AN - SCOPUS:85113491280
T3 - AIP Conference Proceedings
BT - Proceedings of the 3rd International Seminar on Metallurgy and Materials, ISMM 2019
A2 - Darsono, Nono
A2 - Thaha, Yudi Nugraha
A2 - Ridhova, Aga
A2 - Rhamdani, Ahmad
A2 - Utomo, Muhammad Satrio
A2 - Ridlo, Faried Miftahur
A2 - Prasetyo, Mukhlis Agung
PB - American Institute of Physics Inc.
T2 - 3rd International Seminar on Metallurgy and Materials: Exploring New Innovation in Metallurgy and Materials, ISMM 2019
Y2 - 23 October 2019 through 24 October 2019
ER -