The Influence of Processing Time on Morphology, Structure and Functional Properties of PEO Coatings on AZ63 Magnesium Alloy

被引：7

作者：

Moga, Sorin Georgian ^{[1
]}

Negrea, Denis Aurelian ^{[1
]}

Ducu, Catalin Marian ^{[1
,2
]}

Malinovschi, Viorel ^{[3
]}

Schiopu, Adriana Gabriela ^{[2
]}

Coaca, Elisabeta ^{[4
]}

Patrascu, Ion ^{[5
]}

机构：

[1] Univ Pitesti, R&D Ctr Innovat Mat Proc & Prod Automobile Ind, Pitesti 110040, Romania

[2] Univ Pitesti, Dept Mfg & Ind Management, Pitesti 110040, Romania

[3] Univ Pitesti, Dept Environm Engn & Appl Engn Sci, Pitesti 110040, Romania

[4] ELSSA Lab SRL, Pitesti 110109, Romania

[5] Univ Pitesti, Interdisciplinary Doctoral Sch, Pitesti 110040, Romania

来源：

APPLIED SCIENCES-BASEL | 2022年 / 12卷 / 24期

关键词：

surface modification; PEO; AZ63 magnesium alloy; corrosion; micro-hardness; PLASMA ELECTROLYTIC OXIDATION; CORROSION BEHAVIOR; CERAMIC COATINGS; HEAT-TREATMENT; MICROSTRUCTURE; RESISTANCE; HARDNESS;

D O I：

10.3390/app122412848

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The plasma electrolytic oxidation (PEO) surface modification technique was employed for improving the mechanical and anti-corrosion properties of the AZ63 magnesium alloy. Different PEO processing times (5, 10 and 20 min) in a 10 g/L NaAlO2 electrolyte, with no other additives, led to the formation of ceramic coatings with mean thicknesses between 15 and 37 microns. Scanning electron microscopy (SEM) showed that the porosity of the coatings decreased with processing time, but an increase in roughness was observed. X-Ray diffraction phase analysis indicated a coating structure composed of majority magnesium aluminate spinel. The corrosion rate of the coated samples decreased with an order of magnitude compared with the bare alloy. The average micro-hardness values of the PEO-coated samples was up to five times higher than those of the AZ63 alloy.

引用

页数：20

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