蔡婷婷,杨云,李艳芳,曹阳.电镀电流密度对铝锰合金镀层耐蚀性的影响[J].表面技术,2017,46(12):245-250.
CAI Ting-ting,YANG Yun,LI Yan-fang,CAO Yang.Effects of Electroplating Current Density on Corrosion Resistance of Aluminum-Magnesium Alloy[J].Surface Technology,2017,46(12):245-250 |
| 电镀电流密度对铝锰合金镀层耐蚀性的影响 |
| Effects of Electroplating Current Density on Corrosion Resistance of Aluminum-Magnesium Alloy |
| 投稿时间：2017-04-13 修订日期：2017-12-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.12.038 |
| 中文关键词: Al-Mn合金 熔盐电镀 循环伏安 极化曲线 耐蚀性 |
| 英文关键词:Al-Mn alloy molten salt electroplating cyclic voltammetry polarization curve corrosion resistance |
| 基金项目:山西省高等学校大学生创新创业训练计划项目（晋教高2017 3号） |
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| Author | Institution |
| CAI Ting-ting | Department of Chemistry and Chemical Engineering, Lvliang University, Lvliang 033000, China |
| YANG Yun | Department of Chemistry and Chemical Engineering, Lvliang University, Lvliang 033000, China |
| LI Yan-fang | Department of Chemistry and Chemical Engineering, Lvliang University, Lvliang 033000, China |
| CAO Yang | Department of Chemistry and Chemical Engineering, Lvliang University, Lvliang 033000, China |
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| 中文摘要: |
| 目的 提高钢铁材料的耐腐蚀性能。方法 采用添加了质量分数1.0%MnCl2作为锰源的AlCl3- NaCl-KCl熔盐体系，在电流密度分别为13.3、26.7、48.0、50.0、55.6 mA/cm2的条件下在Q235钢表面进行电镀，测试了该熔盐体系中电镀过程的循环伏安曲线。采用X射线衍射仪（XRD）、电子能谱仪（EDS）与扫描电子显微镜（SEM）对镀层表面与横剖面进行检测，并在1.0 mol/L NaCl溶液中，用电化学工作站对镀层进行了动电位极化曲线测试。结果 电镀过程中Al与Mn存在共沉积现象，不同电镀电流密度条件下得到的Al-Mn合金镀层均为非晶态，镀层的剖面分析表明镀层均匀、界线清晰，成分为Al与Mn两种金属。电流密度较小时镀层平整光滑，达到48.0 mA/cm2时，镀层中开始有胞状物质形成，且随电流密度的增大变得显著。平衡电位、线性极化电阻与腐蚀电流密度均随电镀电流密度先增大后减小，并且在电流密度为48.0 mA/cm2时达到最小腐蚀电流密度与最大线性极化电阻。结论 Al-Mn合金镀层为非晶态，电镀电流密度为48.0 mA/cm2得到的镀层在1.0 mol/L NaCl溶液中具有较好的耐腐蚀性。 |
| 英文摘要: |
| The work aims to improve corrosion resistance of iron and steel materials. The surface of Q235 steel was electroplated with AlCl3-NaCl-KCl molten salt system taking 1.0%MnCl2 as Mn source when current density was 13.3, 26.7, 48.0, 50.0 and 55.6 mA/cm2, respectively. Cyclic voltammetry curves of the electroplating process in the molten salt system were tested. Surface and cross section of the plating were detected with X-ray diffractometer (XRD), electron spectroscopy (EDS) and scanning electron microscopy (SEM). Potentiodynamic polarization curve test was performed to the plating with electrochemical workstation in 1 mol/L NaCl solution. The aluminum and manganese were co-deposited during the electroplating process. Al-Mn alloy plating obtained at different electroplating current density was amorphous. Cross-section analysis indicated that the uniform plating had clear boundaries and was composed of Al and Mn. At low current density, the plating obtained was flat and smooth. At the current density of 48.0 mA/cm2, cellular-like substance formed in the plating become distinct as current density increased. Equilibrium potential, linear polarization resistance and corrosion current density first increased and then decreased as the current density increased. The minimum corrosion current density and the maximum linear polarization resistance were obtained at the current density of 48.0 mA/cm2. The Al-Mn alloy coating is amorphous, and the plating obtained at the electroplating current density of 48.0 mA/cm2 exhibits better corrosion resistance in 1 mol/L NaCl solution. |
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