Pitting corrosion behavior of TP304 stainless steel in urban reclaimed water

ZHANG Guiquan; LIU Feng; LIN He; ZHANG Heng; WEN Huifeng; YAO Jiantao; LONG Guojun

doi:10.19666/j.rlfd.201812240

English

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Pitting corrosion behavior of TP304 stainless steel in urban reclaimed water

Thermal Power Generation Vol. 48, Issue 12, Pages: 19-24(2019)

更新时间：2025-09-28

- Pitting corrosion behavior of TP304 stainless steel in urban reclaimed water
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 华能海南发电股份有限公司东方电厂
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201812240
  CLC： TM621.8
- Published Online：31 December 2019，
  
  Published：2019
- 稿件说明：
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ZHANG Guiquan, LIU Feng, LIN He, et al. Pitting corrosion behavior of TP304 stainless steel in urban reclaimed water[J]. Thermal Power Generation, 2019, 48(12): 19-24.
DOI：

ZHANG Guiquan, LIU Feng, LIN He, et al. Pitting corrosion behavior of TP304 stainless steel in urban reclaimed water[J]. Thermal Power Generation, 2019, 48(12): 19-24. DOI： 10.19666/j.rlfd.201812240.

摘要

通过动电位循环极化实验

对TP304不锈钢热网加热器在城市中水中的极化特征进行了研究

得到了95℃下TP304换热管和换热板在城市中水中的点蚀临界Cl~–质量浓度

同时考察了金属表面粗糙度和城市中水pH值对TP304换热管点蚀敏感性的影响。结果表明:TP304不锈钢的点蚀敏感性随着Cl~–质量浓度的升高而增加;TP304材质表面状态和城市中水p H值对点蚀临界Cl~–质量浓度具有显著影响;随着金属表面粗糙度的增加和城市中水pH值的降低

临界点蚀Cl~–质量浓度急剧下降。

Abstract

The polarization characteristics of TP304 stainless steel heat exchanger in urban reclaimed water were studied by potentiodynamic cyclic polarization test. The pitting critical Cl~– mass concentration of TP304 heat pipe and heat plate in urban reclaimed water at 95 ℃ were obtained. Moreover

the effects of metal surface roughness and urban reclaimed water pH value on pitting corrosion sensitivity of the TP304 heat exchanger tube were investigated. The results show that

the pitting corrosion sensitivity of the TP304 stainless steel increased with the Cl~– mass concentration. The surface state of the TP304 steel and the pH value of the urban reclaimed water had a significant effect on the critical Cl~– mass concentration of pitting corrosion. With the increase of metal surface roughness and the decrease of the pH value of urban reclaimed water

the critical Cl~– mass concentration of pitting corrosion decreased sharply.

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