Lay-up corrosion control technology for secondary circuit thermodynamic equipment of high temperature gas-cooled reactor

YAO Hongmeng; YAO Jiantao; SUN Yaping; LONG Guojun; LIU Feng; ZHANG Guiquan

doi:10.19666/j.rlfd.201902043

English

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Lay-up corrosion control technology for secondary circuit thermodynamic equipment of high temperature gas-cooled reactor

Thermal Power Generation Vol. 48, Issue 12, Pages: 8-12(2019)

更新时间：2025-09-28

- Lay-up corrosion control technology for secondary circuit thermodynamic equipment of high temperature gas-cooled reactor
- 作者机构：
  
  1. 华能山东石岛湾核电有限公司
  2. 西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201902043
  CLC： TM623.7
- Published Online：31 December 2019，
  
  Published：2019
- 稿件说明：
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YAO Hongmeng, YAO Jiantao, SUN Yaping, et al. Lay-up corrosion control technology for secondary circuit thermodynamic equipment of high temperature gas-cooled reactor[J]. Thermal Power Generation, 2019, 48(12): 8-12.
DOI：

YAO Hongmeng, YAO Jiantao, SUN Yaping, et al. Lay-up corrosion control technology for secondary circuit thermodynamic equipment of high temperature gas-cooled reactor[J]. Thermal Power Generation, 2019, 48(12): 8-12. DOI： 10.19666/j.rlfd.201902043.

摘要

停用保养方法的选择决定了高温气冷堆二回路停用期间腐蚀的控制水平。本文通过湿热实验考察了相对空气湿度对二回路典型材质干法保养状态下腐蚀的影响;通过浸泡实验、极化曲线

考察了p H值、除氧方式对二回路典型材质湿法保养效果的影响。结果表明:干法保养状态下

相对空气湿度不超过40%

可有效抑制材质表面发生腐蚀;湿法保养状态下

饱和氧工况下溶液p H值提高至10.5

可在金属表面形成稳定的钝化膜;p H值调整至10.0条件下

通过深度除氧

可有效控制金属的腐蚀。

Abstract

The selection of shutdown maintenance method determines the control level of corrosion during lay-up of the secondary loop of high temperature gas-cooled reactor(HTGR). In this paper

the effect of relative air humidity on corrosion of typical secondary loop materials under dry maintenance was investigated by hygrothermal test. The effects of pH value and oxygen removal method on the wet maintenance of typical secondary loop materials were investigated by means of immersion test and polarization curve. The results show that

under the condition of dry maintenance

the relative air humidity is less than 40%

which can effectively inhibit the corrosion on the material surface. For wet maintenance

a stable passivation film can be formed on the metal surface by increasing pH value of the solution to 10.5 under the saturated oxygen condition. When the pH value is adjusted to 10.0

the corrosion of metals can be effectively controlled by deep deoxygenation.

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