表面技术2017，Vol.46Issue(5)：58-65,8.DOI:10.16490/j.cnki.issn.1001-3660.2017.03.011
工艺参数对电沉积制备铝镁合金的影响
Effects of Technological Parameters on Aluminum-magnesium Alloys Prepared by Electrodeposition
摘要
Abstract
The work aims to explore best technological parameters of preparing aluminum-magnesium alloy by electrode-position with AlCl3 and LiAlH4 as solutes, and benzene and tetrahydrofuran as solvents. Mg ions (Mg2+) of certain concentration were obtained by pre-electrodeposition using a pure Mg anode in AlCl3-LiAlH4-benzene-tetrahydrofuran (THF) system, so as to prepare aluminum-magnesium alloy coating by electrodeposition. Effects of technological parameters on morphology, grain size and magnesium content were investigated by changing parameters including current density, electrodeposition time, pre-electrodeposition time and times. Coating morphology, composition and content were tested and analyzed by using scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). Principal components of the coating were Al3Mg2 and Al12Mg17. The surface state was the best and grain size was about 1~2 μm provided with current density of 16.67 mA/cm2. The more the pre-electrodeposition times were, the more Mg2+ were obtained by pre-electrodeposition, and the higher the magne-sium content (of which mass fraction might be up to 2.93%) was. Magnesium content of the coatings increases as the pre-deposition time increases in a certain range. The higher the pre-electrodeposition frequency is, the more dissolved Mg2+ ions are, the higher magnesium content of aluminum-magnesium alloy coatings is. Improvement of magnesium content of the coat-ings will be inhibited if electrodeposition time is too long. The magnesium content is in direct proportion to electrochemical im-pedance, corrosion potential and corrosion resistance of the coatings.关键词
工艺参数/铝镁合金/镁含量/电沉积/耐腐蚀性/有机溶剂Key words
technological parameters/aluminum-magnesium alloys/magnesium content/electrodeposition/corrosion resis-tance/organic solvent分类
矿业与冶金引用本文复制引用
阚洪敏,祝跚珊,冯筱珺,张宁,王晓阳,龙海波..工艺参数对电沉积制备铝镁合金的影响[J].表面技术,2017,46(5):58-65,8.基金项目
辽宁省高等学校优秀人才支持计划项目资助(LJQ2015074) （LJQ2015074）
国家自然科学基金资助(51101104,51372156) Supported by the Program for Liaoning Excellent Talents in University (LJQ2015074) （51101104,51372156）
the National Natural Science Foundation of China (51101104, 51372156) （51101104, 51372156）
