Effects of stress and hydrochemical parameters on intercrystalline corrosion of Incoloy800H alloy

ZHANG Guiquan; YAO Hongmeng; SUN Yaping; CHEN Liqiang; LONG Guojun; YAO Jiantao

doi:10.19666/j.rlfd.201909208

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Effects of stress and hydrochemical parameters on intercrystalline corrosion of Incoloy800H alloy

Thermal Power Generation Vol. 49, Issue 4, Pages: 108-113(2020)

更新时间：2025-09-28

- Effects of stress and hydrochemical parameters on intercrystalline corrosion of Incoloy800H alloy
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 华能山东石岛湾核电有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201909208
  CLC： TM621.8
- Published Online：27 March 2020，
  
  Published：2020
- 稿件说明：
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ZHANG Guiquan, YAO Hongmeng, SUN Yaping, et al. Effects of stress and hydrochemical parameters on intercrystalline corrosion of Incoloy800H alloy[J]. Thermal Power Generation, 2020, 49(4): 108-113.
DOI：

ZHANG Guiquan, YAO Hongmeng, SUN Yaping, et al. Effects of stress and hydrochemical parameters on intercrystalline corrosion of Incoloy800H alloy[J]. Thermal Power Generation, 2020, 49(4): 108-113. DOI： 10.19666/j.rlfd.201909208.

摘要

应用静态浸泡和动电位极化曲线测量

并结合金相显微镜观察

试验研究了某核电机组蒸汽发生器启动过程中应力和水化学参数对Incoloy800H合金晶间腐蚀的影响。结果表明:应力作用显著提高了Incoloy800H合金晶间腐蚀敏感性

且随着应力增大晶间腐蚀敏感性增强;氯离子质量浓度、溶解氧量和p H值等水化学参数对Incoloy800H合金晶间腐蚀具有显著影响

降低氯离子质量浓度和溶解氧量、提高p H值

可有效抑制Incoloy800H合金晶间腐蚀的发生。

Abstract

By means of static immersion

dynamic potential polarization curve measurement and metallographic microscope observation

the effects of stress and hydrochemical parameters on intercrystalline corrosion of Incoloy800H alloy during startup of steam generator were experimentally studied. The results show that

the intercrystalline corrosion sensitivity of the Incoloy800H alloy increased significantly with the stress. The hydrochemical parameters such as mass concentration of chloride ion

dissolved oxygen concentration and pH value had a significant influence on intercrystalline corrosion of the Incoloy800H alloy. Measures like reducing the chloride ion's mass concentration and dissolved oxygen concentration

and increasing the pH value can effectively inhibit the intercrystal corrosion of the Incoloy800H alloy.

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