Pitting Erosion Analysis of Ultra-Pure Ferritic Stainless Steel 445J2 and 316L Ultra-Low-Carbon Austenitic Stainless Steel in Lithium Bromide Solution

武卓杰; 侯利锋; 杜华云; 邹勇; 武敏; 范光伟; 卫英慧

doi:10.20057/j.1003-8620.2022-00069

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Pitting Erosion Analysis of Ultra-Pure Ferritic Stainless Steel 445J2 and 316L Ultra-Low-Carbon Austenitic Stainless Steel in Lithium Bromide Solution

更新时间：2026-01-21

- Pitting Erosion Analysis of Ultra-Pure Ferritic Stainless Steel 445J2 and 316L Ultra-Low-Carbon Austenitic Stainless Steel in Lithium Bromide Solution
- Special Steel Vol. 44, Issue 1, Pages: 65-71(2023)
- 作者机构：
  
  1. 太原理工大学材料科学与工程学院,太原,030024
  2. 山西省金属材料腐蚀与防护工程技术研究中心,太原,030024
  3. 山西不锈钢股份有限公司,太原,030003
- 作者简介：
- 基金信息：
- DOI：10.20057/j.1003-8620.2022-00069
  CLC：
- Received：12 July 2022，
  
  Online First：31 January 2023，
  
  Published：31 January 2023
- 稿件说明：
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武卓杰, 侯利锋, 杜华云, et al. Pitting Erosion Analysis of Ultra-Pure Ferritic Stainless Steel 445J2 and 316L Ultra-Low-Carbon Austenitic Stainless Steel in Lithium Bromide Solution[J]. Special Steel, 2023, 44(1): 65-71.
DOI：

武卓杰, 侯利锋, 杜华云, et al. Pitting Erosion Analysis of Ultra-Pure Ferritic Stainless Steel 445J2 and 316L Ultra-Low-Carbon Austenitic Stainless Steel in Lithium Bromide Solution[J]. Special Steel, 2023, 44(1): 65-71. DOI： 10.20057/j.1003-8620.2022-00069.

摘要

445J2铁素体不锈钢由于高的导热率、低的热膨胀系数以及良好的耐蚀性能使得其作为溴冷机中一些部件的良好候选材料，本文采用电化学测试方法对比研究了445J2超纯铁素体不锈钢(/%:0.01C

22.5Cr

1.9Mo

0.27Nb

0.20Ti

0.09Al

0.36Cu

0.015P

0.001S

0.015N)和316L奥氏体不锈钢(/%:0.002C

16.8Cr

10.19Ni

2.02Mo

0.025P

0.0008S)在20～60℃0.1～1M的溴化锂溶液中的点蚀行为，并采用扫描电镜(SEM)和能谱分析仪(EDS)对电化学结果进行表征。结果表明，随着LiBr温度和浓度的升高，两种钢腐蚀电流密度增大，点蚀电位降低，耐点蚀性变差；氧化物和硫化物夹杂会引起两种钢的点蚀；高含量的Cr以及Mo、Ti、Nb、Al等合金元素使445J2钢具有优异的耐点蚀性能。

Abstract

The high thermal conductivity

low coeffcient of thermal expansion and good corrosion resistance of 445J2 ferrit- ic stainless steel make it be a good candidate for some parts in the bromine cooler. The pitting corrosion behaviors of 445J2 ultrapure ferritic stainless steel(/%:0.01C

22.5Cr

1.9Mo

0.27Nb

0.20Ti

0.09Al

0.36Cu

0.015P

0.001S

0.015N)and 316L austenitic stainless steel(/%:0.002C

16.8Cr

10. 19Ni

2.02Mo

0.025P

0.0008S)in 0.1- 1M lithium bromide solutions at 20-60 ℃ are studied by electrochemical test method. The electrochemical results are characterized by scanning electron microscopy(SEM)and energy dispersive analyzer (EDS).The results show that with the increase of LiBr temperature and concentration

the corrosion current density of the two steels increases

the pitting corrosion potential decreases

and the pitting corrosion resistance deteriorates; oxide and sulfide inclusions can cause pitting corrosion of the two steels; High content of Cr and alloying elements such as Mo

Al make 445J2 steel have excellent pitting resistance.

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