[1]王克文,尚 瑾.doi: 10.3969/j.issn.1001-3849.2026.04.018基于聚己内酯与光热剂的镁合金涂层自修复防腐性能[J].电镀与精饰,2026,(04):122-129.
　WANG Kewen,SHANG Jin.Self-healing anti-corrosion of magnesium alloy coatings based on polycaprolactone and photothermal agents[J].Plating & Finishing,2026,(04):122-129.
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doi: 10.3969/j.issn.1001-3849.2026.04.018基于聚己内酯与光热剂的镁合金涂层自修复防腐性能()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2026年04
页码:
122-129
栏目:
出版日期:
2026-04-30

文章信息/Info

Title:
Self-healing anti-corrosion of magnesium alloy coatings based on polycaprolactone and photothermal agents
作者:
王克文; 尚 瑾
(潍坊科技学院 机械与电气工程学院,山东 潍坊 262700)
Author(s):
WANG Kewen;  SHANG Jin
(School of Mechanical and Electrical Engineering, Weifang University of Science and Technology, Weifang 262700, China)
关键词:
聚己内酯; 光热剂; 新能源汽车; 自修复; 防腐
Keywords:
polycaprolactone;  photothermal agent;  new energy vehicles;  self-healing;  anti-corrosion
分类号:
TQ341 TM912
文献标志码:
A
摘要:
为了解决新能源汽车镁合金部件在复杂服役环境下易腐蚀且难修复问题，研究采用水热法制备了一种基于聚己内酯和单宁酸-Fe(III)络合物的光热响应型自修复防腐涂层，并通过显微镜观察、盐雾浸泡试验、电化学阻抗谱测试及近红外光辐照循环实验，系统评估了该涂层防腐性能及光热自修复能力。实验结果表明，当有划痕的AZ91D镁合金基体表面覆盖所制备的新型涂层后，表面缝隙明显减少。且在模拟道路盐雾环境中浸泡20 d后，该新型涂层电荷转移电阻仍能够达到3.7×107 Ω?cm2。在连续6轮近红外光辐照循环测试中，该涂层的峰值温度始终维持在70 ℃左右，未出现明显衰减，反映出其优良的光热稳定性。此外，随着近红外光辐照时间的延长，带有划痕的新型涂层表现出明显的热响应特性。当辐照12 min时，原有划痕完全愈合，涂层外观恢复平整，表现出优异的光热自修复性能。研究为新能源汽车镁合金部件的长效防护提供了新方案。
Abstract:
To address the corrosion susceptibility and repair challenges of magnesium alloy components in new energy vehicles under complex service environments. Using a hydrothermal method, a photothermal-responsive self-healing anti-corrosion coating was prepared based on polycaprolactone and tannic acid-Fe(III) complexes. The corrosion resistance and photothermal self-healing capabilities of this coating were systematically evaluated through microscopic observation, salt spray immersion testing, electrochemical impedance spectroscopy, and near-infrared light irradiation cycling experiments. The results show that the surface fissures are significantly reduced by applying the novel coating onto scratched AZ91D magnesium alloy substrates. After being immersed in a simulated road salt spray environment for 20 d, the charge transfer resistance of the novel coating remains as high as 3.7×10? Ω ?cm?. During six consecutive cycles of near-infrared irradiation testing, the peak temperature of the coating consistently maintained around 70 ℃ without noticeable attenuation, demonstrating excellent photothermal stability. Furthermore, as near-infrared irradiation time increases, the novel coating with scratches exhibite distinct thermal response characteristics. After being irradiated for 12 min, the original scratches are completely healed. The coating appears smooth and demonstrates outstanding photothermal self-healing performance. This research provides a novel solution for long-term protection of magnesium alloy components in new energy vehicles

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更新日期/Last Update: 2026-04-15