摘要
研究了一种应用于AZ31镁合金的化学抛光工艺。通过考察抛光液组成及工艺参数对镁合金失重和反射率的影响,确定了较佳的抛光工艺条件为:磷酸650mL/L,丙三醇250mL/L,柠檬酸0.6g/L,硫酸铜0.5g/L,温度50°C,时间3min。经此条件抛光后的镁合金表面平整光亮,失重为23g/cm2,反射率为50%,在3.5%(质量分数)NaCl溶液中的腐蚀电位比未抛光时正移0.9V,腐蚀电流密度下降近一个数量级,耐蚀性提高。
A chemical polishing process for AZ31 Mg alloy was studied. The effects of composition of polishing solution and process parameters on weight loss and reflectivity of the Mg alloy were discussed. The optimal polishing process conditions were obtained as follows: HaPO4 650 mL/L, glycerol 250 mL/L, citric acid 0.6 g/L, copper sulfate 0.5 g/L, temperature 50 ~C, and time 3 rain. The Mg alloy surface polished under the above conditions is level and bright, and has a weight loss of 23 g/cm2 and a reflectivity of 50%. The corrosion resistance of the Mg alloy is improved after polishing due to the positive shift of corrosion potential by 0.9 V and the decrease of corrosion current density by nearly one order of magnitude in 3.5wt% NaC1 solution as compared with the Mg alloy without polishing.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2012年第12期38-41,共4页
Electroplating & Finishing
基金
河北省自然科学基金(B2012202002)
河北省高等学校科学技术研究优秀青年基金(Y2011104)
河北工业大学优秀青年科技创新基金(2011010)
关键词
镁合金
化学抛光
反射率
耐蚀性
magnesium alloy
chemical polishing
reflectivity
corrosion resistance