超超临界机组锅炉过热器用T92钢高温腐蚀试验

发布时间：2018-01-10 20:10

  本文关键词：超超临界机组锅炉过热器用T92钢高温腐蚀试验　出处：《热力发电》2017年11期 　论文类型：期刊论文

  更多相关文章： T钢 应力 过热器 高温腐蚀 复合硫酸盐 蒸发 涂盐试验 腐蚀动力学

【摘要】：以超超临界机组锅炉高温过热器用耐热钢T92为研究对象,考虑了过热器工作过程中的应力因素,采取螺栓预紧方式对C型试样施加应力,然后涂盐进行高温腐蚀试验。结果表明:700℃下复合硫酸盐的熔融与挥发在一定程度上影响了T92钢涂盐试样的高温腐蚀行为;未加载应力时,700℃下T92钢腐蚀以高温氧化为主;加载应力时,700℃下应力能加快涂盐T92钢的腐蚀速度。对于大型锅炉过热器的T92钢管道,运行过程中需注意其应力变化对高温作业的影响。
[Abstract]:Taking heat-resistant steel T92 for boiler superheater of ultra-supercritical unit as the research object, the stress factors during the working process of superheater were considered, and the stress was applied to C type specimen by bolt pre-tightening method. The results showed that the melting and volatilization of composite sulfate affected the corrosion behavior of T92 steel at high temperature to some extent. The corrosion of T92 steel at 700 鈩，

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