化溶液中的等离子化奥氏体不钢的电化学行为
Viera Zatkalíková1, Petra Drímalová1, Katarzyna Balin2
1Department of Materials Engineering, Faculty of Mechanical Engineering, University of Žilina, Univerzitná 8215/1, 010 26 Žilina, Slovakia.
Materials (Basel, Switzerland)
|September 14, 2024
概括
化塑增强了AISI 304不钢的硬度,但在化溶液中显著降低了其耐腐蚀性. 这种 tribological 改进的代价是增加对腐蚀性环境的易感性.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 腐蚀科学 腐蚀科学
背景情况:
- 奥氏体不钢在高磨损条件下应用有限,原因是硬度和 tribological 特性不足.
- 化等离子是热化学表面处理,用于提高硬度和耐磨性.
研究的目的:
- 为了评估等离子化AISI 304不钢的耐腐蚀性.
- 为了研究等离子化对化物溶液中AISI 304不钢的表面特征和腐蚀行为的影响.
主要方法:
- 在530°C下在24小时内用AISI 304不钢进行等离子体化.
- 在0.05M和0.5M化溶液中使用潜在动力极化和电化学阻抗光谱进行腐蚀测试.
- 通过光学显微镜,扫描电子显微镜,能量分散式X射线光谱学和X射线光电子光谱学进行表面表征.
主要成果:
- 由于化 (Cr2N) 沉,等离子化形成了一层具有增加的微硬度的层.
- 与所接收的材料相比,化表面的粗度更高.
- 两次电化学试验都表明,即使在稀释化物溶液中,在等离子体化后,耐腐蚀性也显著下降.
结论:
- 虽然等离子化提高了硬度和磨损潜力,但它对AISI 304不钢的耐腐蚀性产生了不利影响.
- 增强的表面层更容易受到化物诱导的腐蚀,限制其在激进环境中的使用.
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