含有Al的ConiV中等热合金涂层的腐蚀行为,由激光覆盖制造
Minghao Fei1, Peng Xu1,2, Ming Zhang3
1College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
Langmuir : the ACS journal of surfaces and colloids
|July 12, 2024
概括
将添加到-- (CoNiV) 中等合金 (MEA) 涂层中,可以在一定程度上提高耐腐蚀性. 然而,过量的可以增加对局部腐蚀的易感性.
科学领域:
- 材料科学 材料科学 材料科学
- 腐蚀工程 腐蚀工程
- 表面工程是什么?表面工程是什么?
背景情况:
- -- (CoNiV) 中等合金 (MEAs) 具有出色的耐腐蚀性.
- 高昂的生产成本和复杂的制造方法限制了MEA的应用.
- 激光覆盖为制造MEA涂层提供了一个潜在的方法.
研究的目的:
- 在AISI 304不钢上通过激光覆盖合成CoNiVAl中合金 (MEA) 涂层.
- 研究兴奋剂对CoNiV MEA涂层的微观结构,相位组成和耐腐蚀性的影响.
- 为了阐明这些涂料在不同度下的腐蚀机制.
主要方法:
- 激光涂层被用于将CoNiVAl MEA涂层沉积在AISI 304不钢基板上.
- 微结构分析使用光学显微镜,扫描电子显微镜 (SEM) 和传输电子显微镜 (TEM).
- 用X射线衍光测量 (XRD) 确定相位组成,并使用电化学工作站分析评估耐腐蚀性.
主要成果:
- 兴奋剂影响了被动膜中O2-/OH的比率,并观察到日益增加的趋势.
- 含有的L21沉阶段,在较高度 (x = 0.3和0.4) 形成的.
- 适度的兴奋剂 (x ≤ 0.2) 通过稳定被动膜并减少腐蚀倾向,增强了耐腐蚀性.
- 过度的兴奋剂 (x > 0.2) 导致L21阶段的形成,增加对局部腐蚀的易感性并降低整体耐腐蚀性.
结论:
- 该研究表明,CoNiV MEA涂层中的兴奋剂对耐腐蚀性有双重影响.
- 优化的含量提高了被动膜的稳定性和腐蚀性能.
- 过量的,导致L21阶段形成,由于局部腐蚀易感性增加,损害了耐腐蚀性.
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