Characteristics of magnesium phosphate coatings formed on AZ31 Mg alloy by plasma electrolytic oxidation with improved current efficiency

被引：22

作者：

Anawati, Anawati ^{[1
]}

Hidayati, Efrina ^{[1
]}

Labibah, Hasna ^{[1
]}

机构：

[1] Univ Indonesia, Fak Matemat & Ilmu Pengetahuan Alam, Dept Fis, Depok 16424, Indonesia

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2021年 / 272卷

关键词：

Plasma electrolytic oxidation; High current density; Magnesium; SEM; EIS; Polarization; CORROSION-RESISTANCE; MICROARC OXIDATION; ANODIC FILMS; BEHAVIOR; MICROSTRUCTURE; MECHANISM; ALUMINUM; SURFACE; GROWTH;

D O I：

10.1016/j.mseb.2021.115354

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A combination of short processing time and high current density is proposed to enhance the current efficiency of the plasma electrolytic oxidation (PEO) process. Magnesium phosphate coating was synthesized on AZ31 Mg alloy using the PEO method for 3 min at a current density of 600, 800, and 1000 A.m(-2). The current efficiency was predicted by the mass gain. The hardness and corrosion behavior were investigated by micro-Vickers hardness and electrochemical measurements, respectively. The resulting magnesium phosphate coatings enhanced the specimen hardness five times and improved the corrosion resistance by two orders of magnitude. The efficiency of the PEO process was relatively high in the range 21.3-53.3%. The highest efficiency was attained at 800 A.m(-2), where an intense micro-arc dominated the PEO process over initial sparking and post arcing. The proposed parameter proved to be beneficial in improving the efficiency of the PEO process.

引用

页数：10

共 52 条

[1] Enhanced uniformity of apatite coating on a PEO film formed on AZ31 Mg alloy by an alkali pretreatment [J].

Anawati ;

Asoh, Hidetaka ;

Ono, Sachiko .

SURFACE & COATINGS TECHNOLOGY, 2015, 272 :182-189

[2] Effects of Alloying Element Ca on the Corrosion Behavior and Bioactivity of Anodic Films Formed on AM60 Mg Alloys [J].

Anawati, Anawati ;

Asoh, Hidetaka ;

Ono, Sachiko .

MATERIALS, 2017, 10 (01)

[3] Characterization of AC PEO coatings on magnesium alloys [J].

Arrabal, R. ;

Matykina, E. ;

Hashimoto, T. ;

Skeldon, P. ;

Thompson, G. E. .

SURFACE & COATINGS TECHNOLOGY, 2009, 203 (16) :2207-2220

[4] Anodizing under sparking of AZ31B magnesium alloy in Na3PO 4 electrolyte [J].

Asoh H. ;

Matsuoka S. ;

Ayama H.S. ;

Ono S. .

Keikinzoku/Journal of Japan Institute of Light Metals, 2010, 60 (11) :608-614

[5] Anodizing treatments for magnesium alloys and their effecton corrosion resistance in various environments [J].

Blawert, Carsten ;

Dietzel, Wolfgang ;

Ghali, Edward ;

Song, Guangling .

ADVANCED ENGINEERING MATERIALS, 2006, 8 (06) :511-533

[6] THEORY OF THE OXIDATION OF METALS [J].

CABRERA, N ;

MOTT, NF .

REPORTS ON PROGRESS IN PHYSICS, 1948, 12 :163-184

[7] The effect of substrate composition on the electrochemical and mechanical properties of PEO coatings on Mg alloys [J].

Cakmak, Emrah ;

Tekin, Kadir C. ;

Malayoglu, Ugur ;

Shrestha, Suman .

SURFACE & COATINGS TECHNOLOGY, 2010, 204 (08) :1305-1313

[8] Growth regularity of ceramic coating on magnesium alloy by plasma electrolytic oxidation [J].

Chang, Limin .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 468 (1-2) :462-465

[9] Magnesium: Engineering the Surface [J].

Chen, X. B. ;

Yang, H. Y. ;

Abbott, T. B. ;

Easton, M. A. ;

Birbilis, N. .

JOM, 2012, 64 (06) :650-656

[10] A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals [J].

Clyne, Trevor William ;

Troughton, Samuel Christopher .

INTERNATIONAL MATERIALS REVIEWS, 2019, 64 (03) :127-162

← 1 2 3 4 5 6 →