Research on corrosion resistance of AZ91D magnesium alloy coated with epoxy resin
The corrosion resistance of a 1~2mm thick AZ91D magnesium alloy die-casting coated with epoxy varnish after phosphatizing was tested. Zinc phosphating solution was used. In the experiment, uniform paint was obtained by dipping method. Scratch test showed that the adhesion force between the coating and matrix is excellent. Within the test range the optimal phosphating temperature and time are 50℃ and 1 min tested by dynamic potential scanning method. With the organic coating the corrosion current density decreased 3 orders of magnitude, the polarization resistance increased 3 orders of magnitude. The coated specimens were immersed in10％ H2SO4, 10％ NaOH and acetone for 10 days, respectively. The results showed that blistering did not occur on the paint films. This work illustrated that the simple zinc phosphating process combined with simple organic coating can meet the corrosion resistance requirements of thin-wall die casting magnesium components that require higher quality appearance.
AZ91D magnesium alloy phosphating corrosion epoxy coating potentiodynamic polarization
Yonggang Li Yinghui Wei Lifeng Hou Yun Tian Lijing Yang
of Materials Science and Engineering, Taiyuan University of Technology,Taiyuan 030024, China College of Materials Science and Engineering, Taiyuan University of Technology,Taiyuan 030024, China Ningbo Institute of Material Technology & Engineering Chinese Academy of Sciences, Ningbo 315201, Ch
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
292-299
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）