The coatings were prepared with different Na2WO4 concentration on AZ80 magnesium alloy by micro-arc oxidation. The scanning electron microscopy, energy-dispersive spectrometry and X-ray diffractometer were used to evaluate the microstructure of the coatings. The mechanical properties of coatings were tested by friction and wear tester and microhardness tester. The corrosion resistance of coatings was studied by electrochemical workstation and slow strain rate tensile test. The results show that the addition of Na2WO4 can promote the growth of the MAO coating, improve the thickness and continuity of the coating, and make the oxide film dense and smooth. The addition of an appropriate amount of Na2WO4 can increase the hardness of the MAO coating, improve the wear resistance and the corrosion resistance of the MAO coating. When the content of Na2WO4 was 0.5 g L–1, the tendency of stress corrosion cracking can be effectively reduced.
YangW, WangJL, XuDP, Microstructure and properties of duplex coatings on magnesium alloy. Surf Eng. 2016;32:601–606. doi: 10.1080/02670844.2015.1108049
2.
ChenMA, OuYC, YuCY, Corrosion performance of epoxy/BTESPT/MAO coating on AZ31 alloy. Surf Eng. 2016;32:38–46. doi: 10.1179/1743294415Y.0000000105
3.
HuZ, LiRL, KairySK, Effect of Sm additions on the microstructure and corrosion behavior of magnesium alloy AZ91. Corros Sci. 2019;149:144–152. doi: 10.1016/j.corsci.2019.01.024
4.
QiuW, LiuZQ, YuRZ, Utilization of VN particles for grain refinement and mechanical properties of AZ31 magnesium alloy. J Alloys Compd. 2019;789:1150–1158. doi: 10.1016/j.jallcom.2018.12.124
5.
ChenJF, LinWX, LiangXY, Effect of alloy cations on corrosion resistance of LDH/MAO coating on magnesium alloy. Appl Surf Sci. 2019;463:535–544. doi: 10.1016/j.apsusc.2018.08.242
6.
YangW, GaoY, XuDP, Bactericidal abilities and in vitro properties of diamond-like carbon films deposited onto MAO-treated titanium. Mater Lett. 2019;244:155–158. doi: 10.1016/j.matlet.2019.02.069
LiuY, YangFW, ZuoGF, Protection of the surface weathering stone artworks by a chemical conversion method. Constr Build Mater. 2018;182:210–214. doi: 10.1016/j.conbuildmat.2018.06.108
9.
GuYH, BandopadhyayS, ChenCF, Effect of oxidation time on the corrosion behavior of micro-arc oxidation produced AZ31 magnesium alloys in simulated body fluid. J Alloys Compd. 2012;543:109–117. doi: 10.1016/j.jallcom.2012.07.130
10.
LiY, LuF, LiH, Corrosion mechanism of micro-arc oxidation treated biocompatible AZ31 magnesium alloy in simulated body fluid. Prog Nat Sci. 2014;24:516–522. doi: 10.1016/j.pnsc.2014.08.007
11.
ZhangRF, ZhangSF, ShenYL, Influence of sodium borate concentration on properties of anodic coatings obtained by micro arc oxidation on magnesium alloys. Appl Surf Sci. 2012;258:6602–6610. doi: 10.1016/j.apsusc.2012.03.088
12.
YangW, XuDP, WangJL, Preparation of MAO coatings doped with graphene oxide. Surf Eng. 2017;33:739–743. doi: 10.1080/02670844.2016.1188498
13.
YangW, KePL, FangY, Microstructure and properties of duplex (Ti:N)-DLC/MAO coating on magnesium alloy. Appl Surf Sci. 2013;270:519–525. doi: 10.1016/j.apsusc.2013.01.073
14.
WangSY, SiNC, XiaYP, Influence of nano-SiC on microstructure and property of MAO coating formed on AZ91D magnesium alloy. T Nonferr Metal Soc. 2015;25:1926–1934. doi: 10.1016/S1003-6326(15)63800-6
15.
ZhangJJ, SongRG, XiangN, Effect of current density on microstructure and properties of PEO ceramic coatings on magnesium alloy. Surf Eng. 2017;33:744–752. doi: 10.1080/02670844.2016.1190123
16.
SharifiH, AliofkhazraeiM, DarbandGB, A review on adhesion strength of PEO coatings by scratch test method. Surf Rev Lett. 2018;25:1830004. doi: 10.1142/S0218625X18300046
MuhaffelF, CimenogluH.Development of corrosion and wear resistant micro-arc oxidation coating on a magnesium alloy. Surf Coat Technol. 2019;357:822–832. doi: 10.1016/j.surfcoat.2018.10.089
19.
TekinKC, MalayoğluU, ShresthaS.Tribological properties of plasma electrolytic oxide coatings on magnesium alloys. Tribol – Mater Surf Interfaces. 2012;6:67–74. doi: 10.1179/1751584X12Y.0000000006
20.
HeX, SongRG, KongDJ.Microstructures and properties of Ni/TiC/La2O3 reinforced Al based composite coatings by laser cladding. Opt Laser Technol. 2019;117:18–27. doi: 10.1016/j.optlastec.2019.04.002
21.
FanXZ, XuJY, WangY.Arioka preparation and corrosion resistance of MAO layer/Yb2SiO5 composite coating on Mg alloy. Surf Coat Technol. 2014;240:118–127. doi: 10.1016/j.surfcoat.2013.12.024
22.
TekinKC, MalayoğluU, ShresthaS.Electrochemical behavior of plasma electrolytic oxide coatings on rare earth element containing Mg alloys. Surf Coat Technol. 2013;236:540–549. doi: 10.1016/j.surfcoat.2013.10.051
23.
CakmakE, TekinKC, MalayogluU, The effect of substrate composition on the electrochemical and mechanical properties of PEO coatings on Mg alloys. Surf Coat Technol. 2010;204:1305–1313. doi: 10.1016/j.surfcoat.2009.10.012
24.
ShenZ, KaramchedP, AriokaK, Observation and quantification of the diffusion-induced grain boundary migration ahead of SCC crack tips. Corros Sci. 2019;147:163–168. doi: 10.1016/j.corsci.2018.11.019
