[1]陈晓辉*,宋 倩,王 伟,等.doi: 10.3969/j.issn.1001-3849.2025.06.004测绘仪器用镁合金的表面改性与耐蚀性能研究[J].电镀与精饰,2025,(06):23-27.
　Chen Xiaohui*,Song Qian,Wang Wei,et al.Research on surface modification and corrosion resistance of magnesium alloy for surveying instruments[J].Plating & Finishing,2025,(06):23-27.
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doi: 10.3969/j.issn.1001-3849.2025.06.004测绘仪器用镁合金的表面改性与耐蚀性能研究()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2025年06
页码:
23-27
栏目:
出版日期:
2025-06-30

文章信息/Info

Title:
Research on surface modification and corrosion resistance of magnesium alloy for surveying instruments
作者:
陈晓辉1*; 宋 倩1; 王 伟2; 王春尧2; 罗志峰3; 秦叔玉3
(1. 吉林建筑科技学院 土木工程学院,吉林 长春 130114 ;2. 吉林南方测绘科技有限公司,吉林 长春 1300 00;3. 吉林大学 材料科学与工程学院,吉林 长春 130015)
Author(s):
Chen Xiaohui1*;  Song Qian1;  Wang Wei2;  Wang Chunyao2;  Luo Zhifeng3;  Qin Shuyu3
(1. Department of Civil Engineering, Jilin Institute of Architecture and Technology, Changchun 130114, China; 2. Jilin South Surveying and Mapping Technology Co., Ltd., Changchun 130000, China; 3. College of Materials Science and Engineering, Jilin University, Changchun 130015, China)
关键词:
测绘仪器; AZ91镁合金; 转化膜; 显微形貌; 耐腐蚀性能
Keywords:
surveying instruments;  AZ91 magnesium alloy;  conversion film;  microscopic morphology;  corrosion resistance
分类号:
TG174.4
文献标志码:
A
摘要:
为提高测绘仪器用AZ91镁合金的表面耐蚀性能，采用硝酸铈溶液、硝酸镧溶液和硝酸铈+硝酸镧复合溶液在AZ91镁合金表面制备了稀土转化膜改性层。对比分析了3种改性层的表面形貌和耐蚀性能，并优化了复合改性层的浸渍时间。结果表明：相较于无转化膜的基体试样，改性层A、改性层B和复合改性层C的腐蚀电位都发生了正向移动，腐蚀电流密度从小至大的顺序为：复合改性层C＜改性层B＜改性层A＜基体，且改性层A、改性层B和复合改性层C的腐蚀抑制率分别为7.46%、66.43%和76.87%，复合改性层C的耐蚀性能优于改性层A和改性层B。复合改性层C的平滑区和裂纹区的Ce和La含量都高于改性层A和改性层B，表明成膜介质中的La和Ce元素在成膜过程中可以起到协同作用。随着浸渍时间延长，复合改性层C的腐蚀电位逐渐正移，腐蚀电流密度先减后增，浸渍时间为30 min时取得腐蚀电流密度最小值，此时复合改性层C具有最佳的耐蚀性能。
Abstract:
In order to improve the surface corrosion resistance of AZ91 magnesium alloy used in surveying instruments, rare earth conversion coating modified layers were prepared on the surface of AZ91 magnesium alloy using cerium nitrate solution, lanthanum nitrate solution, and cerium nitrate & lanthanum nitrate composite solution. The surface morphology and corrosion resistance of the three modified layers were compared and analyzed, and the immersion time of the composite modified layer was optimized. The results showed that compared to the matrix sample without a conversion film, the corrosion potentials of modified layer A, modified layer B, and composite modified layer C all shifted positively, the order of corrosion current density from small to large was: composite modified layer C

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更新日期/Last Update: 2025-06-18