在AZ91合金上用LDH纳米片制备氧化物涂层的制备和表征,采用单步低压微弧氧化工艺
Longfeng Shi1,2, Xuchen Lu1, Peixuan Li2
1College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
Materials (Basel, Switzerland)
|January 28, 2026
概括
研究人员使用低压微弧氧化方法在AZ91合金上开发了带有多层双氧化物 (LDH) 纳米板的氧化物涂层. 这些涂料增强了耐腐蚀性,特别是在酸改性后,提供了卓越的疏水性和保护.
科学领域:
- 材料科学 材料科学 材料科学
- 腐蚀科学 腐蚀科学
- 表面工程是什么?表面工程是什么?
背景情况:
- 像AZ91这样的合金容易腐蚀.
- 开发有效的保护涂层对于合金应用至关重要.
- 层层的双氧化物 (LDH) 纳米片显示出增强材料保护的希望.
研究的目的:
- 在AZ91合金上制备氧化物涂层,其中包括层层的双氧化物 (LDH) 纳米片.
- 研究LDH纳米板对涂料微观结构和耐腐蚀性的影响.
- 为了评估用牛油酸修饰的涂料的性能.
主要方法:
- 一步式低压微弧氧化 (MAO) 工艺.
- 使用扫描电子显微镜 (SEM),能量分散式X射线光谱 (EDS),X射线衍射 (XRD),里埃变形红外光谱 (FT-IR) 和X射线光电子光谱 (XPS) 的表征.
- 通过电化学分析和演变试验对腐蚀保护的评估.
主要成果:
- 在AZ91上通过MAO在100V以下成功生产了Mg-Al-LDH纳米片的氧化物涂层.
- 具有较高Mg-Al LDH纳米板密度的涂层显示出更好的耐腐蚀性.
- 乙酸的修饰导致了高度疏水性和耐腐蚀的涂层.
结论:
- 低压MAO在AZ91合金上有效地产生含有LDH的氧化物涂层.
- Mg-Al LDH纳米板的密度直接影响着涂层的防腐蚀能力.
- 用酸修改表面显著提高了涂料的疏水性和耐腐蚀性.
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