残余应力存在时Cl<sup>-</sup>对304不锈钢管道点蚀行为的影响

王亮添; 胡文钰; 黄国斌; 徐创丽; 徐浩

doi:10.7652/xjtuxb202211011

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残余应力存在时Cl^-对304不锈钢管道点蚀行为的影响

—————————————————————— | 更新时间：2025-07-09

- 残余应力存在时Cl^-对304不锈钢管道点蚀行为的影响
- Effects of Cl^- on Pitting Corrosion of 304 Stainless Steel Pipes in the Presence of Different Residual Stresses
- 西安交通大学学报 2022年56卷第11期页码：104-114
- 作者机构：
  
  1. 西安交通大学环境科学与工程系,西安,710049
  2. 广东申菱环境系统股份有限公司,广东,佛山,528313
- 作者简介：
  
  : 2022-03-22。作者简介: 王亮添(1980—),男,博士生
  徐浩(通信作者),男,副教授,博士生导师。基金项目: 陕西省自然科学基础研究计划资助项目(2021JM-012)
- 基金信息：
  
  : 2022-03-22。作者简介: 王亮添(1980—),男,博士生;徐浩(通信作者),男,副教授,博士生导师。基金项目: 陕西省自然科学基础研究计划资助项目(2021JM-012);教育部基本科研业务费资助项目(xjh012020037)
- DOI：10.7652/xjtuxb202211011
  中图分类号： TG172
- 网络首发：2022-11-10，
  
  纸质出版：2022
- 稿件说明：
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王亮添, 胡文钰, 黄国斌, 等. 残余应力存在时Cl^-对304不锈钢管道点蚀行为的影响[J]. 西安交通大学学报, 2022,56(11):104-114. DOI: 10.7652/xjtuxb202211011.

WANG Liangtian, HU Wenyu, HUANG Guobin, et al. Effects of Cl^- on Pitting Corrosion of 304 Stainless Steel Pipes in the Presence of Different Residual Stresses[J]. 2022, 56(11): 104-114. DOI: 10.7652/xjtuxb202211011.
王亮添, 胡文钰, 黄国斌, 等. 残余应力存在时Cl^-对304不锈钢管道点蚀行为的影响[J]. 西安交通大学学报, 2022,56(11):104-114. DOI: 10.7652/xjtuxb202211011. DOI：

WANG Liangtian, HU Wenyu, HUANG Guobin, et al. Effects of Cl^- on Pitting Corrosion of 304 Stainless Steel Pipes in the Presence of Different Residual Stresses[J]. 2022, 56(11): 104-114. DOI: 10.7652/xjtuxb202211011. DOI：

摘要

探究残余应力状态对304不锈钢管点蚀行为的影响

采用开路电位、动电位极化、交流阻抗谱、Mott-Schottky等方法

研究应力状态及Cl

浓度两种关键因素对冷弯加工后的304不锈钢弯管腐蚀行为的影响

测试弯管不同部位在100、1 000 mg/L的Cl

溶液中的点蚀行为及钝化膜特性

分析了应力状态和Cl

浓度对不锈钢点蚀行为的影响规律及对应腐蚀机理。结果表明

冷加工后304不锈钢U弯拉伸面、压缩面的残余应力分别为拉应力和压应力

未变形的直管部分几乎无应力。腐蚀试验表明

当Cl

质量浓度为100 mg/L时

残余应力会增强不锈钢耐Cl

点蚀的能力并降低钝化膜的载流子浓度

拉应力作用效果强于压应力

而无应力处蚀坑深度最大(80.426 μm); 当Cl

质量浓度为1 000 mg/L时

拉应力与压应力均降低不锈钢耐Cl

点蚀的能力

且拉应力处蚀坑深度(117.956 μm)为同浓度下最大。

Abstract

This paper explores the effects of residual stresses on the pitting corrosion of 304 stainless steel pipes. The open circuit potential(OCP)

polarization test

electrochemical impedance spectroscopy(EIS)

Mott-Schottky and other methods are used to study the effects of stresses and Cl

concentration on the corrosion of cold-bent 304 stainless steel elbows. The pitting corrosion and passive film characteristics of different parts of the elbow in 100 and 1 00

0 mg/L Cl

solution were tested. How the stresses and Cl

concentration affect the pitting corrosion of stainless steel and the corresponding corrosion mechanism were analyzed. The results show that the residual stresses on the U-bend tensile surface and compression surface of 304 stainless steel after cold machining are tensile and compressive stresses respectively

and that there is almost no stress on the undeformed straight pipe. The corrosion test shows that when the Cl

concentration is 100 mg/L

the residual stress will enhance the ability of stainless steel to resist Cl

pitting corrosion and reduce the carrier concentration of the passivation film. The effects of tensile stress are stronger than those of compressive stress and the maximum pit depth is 80.426 μm). When the Cl

concentration is 1 000 mg/L

both tensile and compressive stresses reduce the ability of stainless steel to resist Cl

pitting corrosion

and the pit size at the tensile stress is the greatest under the same concentration condition(117.956 μm).

关键词

Keywords

references

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残余应力存在时Cl-对304不锈钢管道点蚀行为的影响

Effects of Cl- on Pitting Corrosion of 304 Stainless Steel Pipes in the Presence of Different Residual Stresses

DOI：10.7652/xjtuxb202211011

摘要

Abstract

关键词

Keywords

references

残余应力存在时Cl^-对304不锈钢管道点蚀行为的影响

Effects of Cl^- on Pitting Corrosion of 304 Stainless Steel Pipes in the Presence of Different Residual Stresses