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在低温等离子体化Inconel 718中化沉的局部腐蚀

Juan Fernando Uribe Cruz¹, Oriana Palma Calabokis^1,2, Vladimir Ballesteros-Ballesteros¹

¹Faculty of Engineering and Basic Sciences, Fundación Universitaria Los Libertadores, Bogotá 111221, Colombia.

Materials (Basel, Switzerland)

|January 10, 2026

概括

连续化Inconel 718的等离子体增强了表面硬度,但在化物环境中显著降低了局部耐腐蚀性. 这种处理损害了关键孔温度,使合金更容易受到腐蚀的影响.

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:

合金718是用于含环境中的应用的关键合金.
在这种情况下,局部耐腐蚀性对Inconel 718的性能至关重要.

研究的目的:

为了评估持续的低温等离子体化对Inconel 718的微观结构,硬度和局部腐蚀行为的影响.
为了确定化等离子体作为提高Inconel 718耐久性的表面修饰技术的有效性.

主要方法:

在425°C下持续2小时的低温等离子体化.
使用X射线衍射 (XRD) 的微结构分析.
硬度测试和循环极化测试,以评估耐腐蚀性.
确定关键孔温度 (CPT).

主要成果:

化等离子体增加了三倍的表面硬度,形成了6.1-6.7微米的化层.
XRD证实了没有扩展相的CrN沉.
化样品的腐蚀率翻了一番,CPT降低了30°C以上,降至10°C以下.

结论:

连续的等离子化有效地提高了Inconel 718的表面硬度.
化过程显著降低了Inconel 718在富含化物环境中的局部耐腐蚀性.
受损的CPT表明,在攻击性条件下,化Inconel 718的性能范围降低了.

关键词:

在Inconel 71818中使用.化物环境中的化物.二化物 CrNN 二化物 CrNN 耐腐蚀性耐腐蚀性耐腐蚀性关键的插入温度是关键的插入温度.化等离子体化

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