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三种合金基材及其接在模拟烟环境中的比较腐蚀行为

Caigan Che^1,2, Xuhui Zhao¹, Yu Zuo¹

¹BUCT, 100029, Beijing, China.

|September 9, 2024

概括

合金的耐腐蚀性因接而异. TC4 和 TB6 基本金属比它们的接更有耐力,而 TA2 基本金属的耐力较低. 这影响了合金烟设计.

科学领域:

材料科学材料科学材料科学
腐蚀工程腐蚀工程

背景情况:

合金对于工业应用至关重要,包括烟,因为它们的强度和耐腐蚀性.
了解接对合金腐蚀行为的影响对于材料选择和结构完整性至关重要.

研究的目的:

为了研究TA2,TC4和TB6合金在3%硫酸烟气环境中接后的腐蚀行为.
分析影响普通金属,接金属和热受影响区域 (HAZ) 耐腐蚀性的微观结构变化.

主要方法:

电化学试验 (腐蚀潜力,电流密度测量).
微观分析包括扫描电子显微镜与能量分散光谱 (SEM/EDS),X射线衍射 (XRD) 和金属显微镜.

主要成果:

与其接金属相比,TC4和TB6基础金属表现出优越的耐腐蚀性 (较低的电流密度,更高的潜力).
TA2基础金属的耐腐蚀性 (较高的电流密度) 比其接和HAZ金属低.
微结构分析揭示了相位过渡和粒度大小变化,与观察到的腐蚀行为相关.

结论:

接显著改变了合金的耐腐蚀性,影响因合金类型而异 (TA2 vs TC4/TB6).
微观结构的变化,如β相过渡和TC4/TB6接中的粒度增长,降低了耐腐蚀性.
在接后,TA2的细粒度结构提高了其耐腐蚀性,与TC4和TB6形成鲜明对比.
研究结果为优化合金结构在腐蚀性环境 (如烟气系统) 中的设计和维护提供了关键数据.

关键词:

阿贡弧接的接方法烟的烟雾气是烟的烟雾气.电化学测试电化学测试微观结构分析是指微观结构的分析.硫酸露点腐蚀的硫酸腐蚀合金是一种合金.

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