New features of surface modification of magnesium alloys by microarc oxidation (MAO)

被引：1
|
作者：
Subbotina, V. [1 ]
Bilozerov, V. [1 ]
Subbotin, O. [1 ]
Kniaziev, S. [1 ]
Volkov, O. [1 ]
Lazorko, O. [1 ]
机构：
[1] Natl Tech Univ, Kharkiv Polytech Inst, 2 Kyrpychova Str, UA-61002 Kharkiv, Ukraine
来源：
FUNCTIONAL MATERIALS | 2023年 / 30卷 / 04期
关键词：
microarc oxidation; magnesium alloys; electrolytes; phase composition; hardness; adhesion; corrosion resistance; PLASMA ELECTROLYTIC OXIDATION; CORROSION-RESISTANCE; MG ALLOY; PARAMETERS; COATINGS; BEHAVIOR;
D O I：
10.15407/fm30.04.590
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The work investigates the features of forming M & Acy;O coatings on magnesium alloys. It is shown that due to the choice of electrolysis conditions (electrolyte composition, current density and oxidation time) the process of microarc oxidation in the microarc discharge mode is stably implemented. It has been established that as a result of M & Acy;O treatment, ceramic coatings containing phases of magnesium oxide MgO, spinel MgAl2O4, Mg2SiO4 and Mg-3(& Rcy;& Ocy;(4))(2) are formed. The phase composition of the coatings is determined by the composition of the electrolyte. The electrolysis conditions studied in this work provide high hardness of the coatings, reaching 7500 MPa, as well as high corrosion resistance. The obtained results allow us to recommend M & Acy;O coatings obtained on magnesium alloys both as an outer (functional) layer with high adhesion to the substrate and as a sublayer for the subsequent application of protective coatings (varnishes, polymers, in particular polytetrafluoroethylene).
引用
收藏
页码：590 / 596
页数：7
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