[1]刘子豪,王保杰*,邢馨月,等.doi: 10.3969/j.issn.1001-3849.2025.09.016酸比对镁锂合金表面钙系磷酸盐化学转化膜的耐腐蚀性影响[J].电镀与精饰,2025,(09):112-118.
　Liu Zihao,Wang Baojie*,Xing Xinyue,et al.Effect of acid ratio on corrosion resistance of calcium phosphate chemical conversion film on magnesium-lithium alloy surface[J].Plating & Finishing,2025,(09):112-118.
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doi: 10.3969/j.issn.1001-3849.2025.09.016酸比对镁锂合金表面钙系磷酸盐化学转化膜的耐腐蚀性影响()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2025年09
页码:
112-118
栏目:
出版日期:
2025-09-30

文章信息/Info

Title:
Effect of acid ratio on corrosion resistance of calcium phosphate chemical conversion film on magnesium-lithium alloy surface
作者:
刘子豪; 王保杰*; 邢馨月; 王 鹏; 初文超; 孙 杰
(沈阳理工大学 环境与化学工程学院,辽宁 沈阳 110159)
Author(s):
Liu Zihao;  Wang Baojie*;  Xing Xinyue;  Wang Peng;  Chu Wenchao;  Sun Jie
(School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China)
关键词:
镁锂合金; 化学转化膜; 酸比; 耐腐蚀性
Keywords:
magnesium-lithium alloy;  chemical conversion film;  acid ratio;  corrosion resistance
分类号:
TG178
文献标志码:
A
摘要:
以Mg-8Li合金作为基体，在不同酸比条件下制备钙系磷酸盐转化膜, 通过扫描电子显微镜、能谱仪、点滴实验、电化学阻抗谱图(EIS)、动电位极化曲线、析氢测试对其微观组织进行表征，并比较其耐蚀性。研究结果表明，镁锂合金表面成功制备银白色钙系磷酸盐转化膜，膜层表面光滑且致密无裂纹，其主要元素组成为氧、磷、钙、碳、镁和钠；酸比为75时，腐蚀电流密度最低，为5.227×10?7 A/cm 2，腐蚀电位最正，为?1.481 V (vs. SCE)；金属出现变色历经时间最长，为31.5 s；析氢量最少，为2.57 mL/cm2。钙系磷酸盐转化膜在酸比为75的条件下形成的转化膜对于Mg-8Li基体的保护性最好，耐腐蚀性能最佳。
Abstract:
Calcium based phosphate conversion coatings were prepared at the surface of Mg-8Li alloy under different acid ratios. The microstructure of the coatings and corrosion behavior was studied by scanning electron microscopy, energy dispersive spectroscopy, drop experiments, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization curves and hydrogen evolution tests. The results indicate that a silver white calcium-based phosphate conversion film has been successfully prepared on the surface of magnesium lithium alloys, which is smooth, dense, and crack free. Its main elemental composition is oxygen, phosphorus, calcium, carbon, magnesium, and sodium; When the acid ratio is 75, the film have the lowest corrosion current density of 5.227×10?7 A/cm 2, the most positive corrosion potential of ?1.481 V (vs. SCE), the longest metal discoloration time of 31.5 seconds and the lowest hydrogen evolution rate of 2.57 mL/cm2. The conversion film formed by calcium phosphate conversion film under the condition of acid ratio of 75 has the best corrosion resistance for Mg-8Li alloy

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更新日期/Last Update: 2025-09-11