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对纳入演变和Nb微合金钢的蚀的影响

Leru Zhang¹, Yanchong Yu¹, Jinling Zhang¹

¹College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.

Langmuir : the ACS journal of surfaces and colloids

|July 11, 2024

概括

(Ce) 处理可转化有害的钢材内含物,显著减少蚀. 这提高了微合金钢在建筑应用中的耐用性和使用寿命.

科学领域:

材料科学材料科学材料科学
腐蚀工程腐蚀工程
金工业是金工业的一个方面.

背景情况:

微合金钢为建筑提供了出色的机械性能,但遭受严重的蚀腐蚀.
包含类型是这些钢中蚀的主要驱动因素.
提高耐腐蚀性对于延长建筑材料的使用寿命至关重要.

研究的目的:

研究 (Ce) 处理对含微合金钢中含修饰的影响.
为了评估Ce诱导的包装变化对坑道耐腐蚀性的影响.
建立包括进化和穿孔腐蚀机制的模型.

主要方法:

制备两种类型的Nb微合金钢 (0%Ce和0.0058%Ce).
使用工业生产样本对包括修改的分析.
电化学试验用于评估耐腐蚀性.
沉浸实验以模拟坑道腐蚀.

主要成果:

处理修改的球形CaS•C12A7内含物进入较小的圆形Ce2O2S内含物.
小插入 (0-2μm) 的比例从27%增加到66%,消除了大插入 (>6μm).
这种处理正面地转移了腐蚀潜力,减少了腐蚀电流,减少了被动膜缺陷,并显著改善了耐腐蚀性.

结论:

添加有效地修改了入,减少了入核化部位,并减轻了入腐蚀.
通过Ce处理对内含物进行转化,导致坑的数量和大小显著减少.
这项研究提供了理论支持,通过包装工程来提高钢的耐腐蚀性.

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