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热喷涂技术:2024,16(1):35-47
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ZM6镁合金的冷喷铝涂层工艺及耐腐蚀性能研究
徐雷1, 丁宁2, 李彰1, 王森源1, 陈立3, 王长亮1, 郭孟秋1, 石仲川1, 田浩亮1
(1.中国航发北京航空材料研究院;2.空装驻北京地区第六军事代表室;3.中国石油长庆油田分公司 第六采油厂)
Research on Cold Spray Aluminum Coating Process and Corrosion Resistance of ZM6 Magnesium Alloy
XULEI1, DINGNING2, LIZHANG1, WANGSENYUAN1, CHEN Li3, WANGCHANGLIANG1, GUOMENGQIU1, SHIZHONGCHUAN1, TIANHAOLIANG1
(1.AECC Beijing Institution of Aeronautical Materials;2.No Military representative office in Beijing region;3.The Sixth Oil Production Plant of China Petroleum Changqing Oilfield Company)
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投稿时间:2024-03-12    修订日期:2024-04-21
中文摘要: 为提高镁合金的耐腐蚀性能,本研究在ZM6镁合金基体上采用冷喷涂工艺制备铝涂层,研究了冷喷涂工艺参数(气体温度、压力、喷枪距离及压力)对铝涂层质量的影响,得出最佳工艺参数并利用该最佳工艺参数制备出铝涂层进行盐雾试验。试验结果表明:冷喷涂铝涂层的最佳工艺参数为温度310℃;气体压力2.0MPa;喷涂最佳距离20mm;基板相对移动速度30~50mm.s-1。冷喷涂铝的薄涂层盐雾腐蚀的腐蚀产物为Al2O3、Al(OH)3、Mg(OH)2和MgCl2。随着时间的增长,薄铝涂层被击穿并与镁合金发生电偶腐蚀,加速了基体的腐蚀。冷喷涂铝的厚涂层由于表面形成致密而连续的氧化膜,阻碍了腐蚀介质的侵入,对镁合金基体产生了较好的防护作用。利用最佳工艺参数制备的冷喷涂铝的厚涂层耐盐雾时间超过1200h。
中文关键词: 镁合金  冷喷涂  盐雾试验  工艺参数
Abstract:In order to improve the corrosion resistance of magnesium alloy, this study used cold spraying process to prepare aluminium coating on ZM6 magnesium alloy substrate, investigated the effect of cold spraying process parameters (gas temperature, pressure, spraying distance and pressure) on the quality of aluminium coatings, and came up with the optimum process parameters and prepared aluminium coatings using the optimum process parameters for salt spray test. The test results show that: the optimum process parameters for cold spraying aluminium coating are temperature 310 ℃; gas pressure 2.0 MPa; optimum distance of spraying 20 mm; and relative movement speed of the substrate 30-50 mm.s-1. The corrosion products of salt spray corrosion of cold sprayed aluminium thin coatings are Al2O3, Al(OH)3, Mg(OH)2, and MgCl2. With the growth of time, the thin aluminium coatings are punctured and galvanic coupling corrosion with magnesium alloy occurred, accelerating the corrosion of the substrate. The thick coating of cold sprayed aluminium produced a better protective effect on the magnesium alloy substrate due to the formation of a dense and continuous oxide film on the surface, which hindered the intrusion of corrosive media.The salt spray resistance time of the thick coating of cold sprayed aluminum prepared using the optimal process parameters exceeds 1200 hours.
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基金项目:国家重点研发计划(2021YFB3702004);国家科技重大专项(2017-VII-0012-0109); 国家自然科学基金(52075508)
引用文本:
徐雷,丁宁,李彰,陈立,王长亮,郭孟秋,石仲川,田浩亮.ZM6镁合金的冷喷铝涂层工艺及耐腐蚀性能研究[J].热喷涂技术,2024,16(1):35-47.
XULEI,DINGNING,LIZHANG,CHEN Li,WANGCHANGLIANG,GUOMENGQIU,SHIZHONGCHUAN,TIANHAOLIANG.Research on Cold Spray Aluminum Coating Process and Corrosion Resistance of ZM6 Magnesium Alloy[J].Thermal Spray Technology,202416(1):35-47.

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