离子液体中电沉积Al-Mn合金及其耐蚀性能研究  

Research on electrodeposition of Al-Mn alloy in ionic liquid and its corrosion resistance

作　　者：李浩鹏 王邺 王怡然 李庆阳 郑勇[4] 王倩[2] LI Haopeng;WANG Ye;WANG Yiran;LI Qingyang;ZHENG Yong;WANG Qian(Henan Institute of Advanced Technology,Zhengzhou University,Zhengzhou 450001,China;Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Institute of Advanced Wear&Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China;College of Chemical and Environmental Engineering,Anyang Institute of Technology,Anyang 450000,China)

机构地区：[1]郑州大学河南先进技术研究院,河南郑州450001 [2]中国科学院过程工程研究所,北京100190 [3]暨南大学先进耐磨蚀及功能材料研究院,广东广州510632 [4]安阳工学院化学与环境工程学院,河南安阳450000

出　　处：《有色设备》2025年第2期42-49,共8页Nonferrous Metallurgical Equipment

基　　金：国家自然科学基金资助项目“离子液体电沉积致密铝层的多物理场耦合调控机制”、“离子液体在低温电沉积制备纳米铝中的应用基础研究”(22378400,21406002);河南省自然科学基金资助项目“高纯铝在离子液体中低温电解精炼制备的反应机理及其调控机制”(232300421209);中国科学院化工冶金低碳变革技术及示范战略性先导科技专项“氯化铝离子液体低温电解铝变革性技术示范”(XDA0390203)。

摘　　要：铝-锰(Al-Mn)合金具有优异的塑性、焊接性和抗腐蚀能力,在钢铁的腐蚀防护中具有广阔的应用前景。本文在以1-乙基-3-甲基咪唑氯盐与氯化铝和氯化锰组成的离子液体电解液中,采用循环伏安法和计时电位法研究了Al-Mn的电沉积行为。采用扫描电子显微镜、能量色散X射线光谱以及X射线衍射技术对比研究了不同电流密度下制备Al-Mn沉积层的表面形貌、元素组成和晶体结构。采用开路电位曲线和动电位极化曲线评价了Al-Mn沉积层在模拟海水中的抗腐蚀能力。此外,还系统研究了不同退火温度和时间对Al-Mn沉积层形貌和耐蚀性能的影响。结果表明:随着电流密度的升高,Al-Mn沉积层经历了由非晶态向晶态的转变;非晶态的Al-Mn沉积层相较晶态的沉积层具有更好的耐蚀性能;而适当的热处理可进一步提升其抗腐蚀能力。Aluminum-manganese(Al-Mn)alloy possesses good plasticity,weldability and corrosion resistance,thus showing broad application prospects for corrosion protection of steel.Herein,the electrodeposition behavior of Al-Mn is investigated by cyclic voltammetry and chronopotentiometry in the ionic liquid electrolyte composed by 1-ethyl-3-methylimidazolium chloride,aluminum chloride and manganese chloride.Scanning electron microscopy,energy dispersive X-ray spectroscopy,and X-ray diffraction techniques are employed to compare the surface morphology,elemental composition,and crystal structure of Al-Mn coatings electrodeposited at different current densities.The corrosion resistance of Al-Mn coatings in the simulated seawater is evaluated using open circuit potential and potentiodynamic polarization curves.Meanwhile,the effects of annealing temperature and time on the surface morphology and anti-corrosion ability of Al-Mn coatings are also studied,systematically.The results demonstrate that Al-Mn coating undergoes a structural transformation from amorphous state to crystalline state with the increase of current density.Among them,the amorphous coating displays a better corrosion resistance than the crystalline counterpart,while appropriate heat treatment can further improve its anti-corrosion property.

关 键 词：铝合金 离子液体 电沉积 耐蚀性能 晶体结构 热处理 

分 类 号：TG146.21[一般工业技术—材料科学与工程]