石油化工设备技术 ›› 2021, Vol. 42 ›› Issue (5): 52-56.doi: 10.3969/j.issn.1006-8805.2021.05.010

• 腐蚀与防护 • 上一篇    

不锈钢S30403在循环水工况中的耐蚀性能研究

李晓炜1,王奕璇1,张杰2,王团亮2,段永锋1   

  1. 1. 中石化炼化工程(集团)股份有限公司洛阳技术研发中心,河南 洛阳 471003;
    2. 中国石油化工股份有限公司中原油田分公司,四川 达州 635000
  • 收稿日期:2021-05-24 接受日期:2021-08-25 出版日期:2021-09-15 发布日期:2021-09-09
  • 作者简介:李晓炜,男,2014年毕业于北京化工大学材料与科学工程专业,硕士,主要从事石油化工腐蚀与防护方面的研究工作,工程师。Email:lixiaowei.segr@sinopec.com

On Corrosion Resistance of Stainless Steel S30403 in Circulating Water

Li Xiaowei1, Wang Yixuan1, Zhang Jie2, Wang Tuanliang2, Duan Yongfeng1   

  1. 1. SINOPEC Engineering (GROUP) Luoyang R&D Center of Technologies, Luoyang, Henan, 471003;
    2. SINOPEC Zhongyuan Oilfield Company, Dazhou, Sichuan, 635000
  • Received:2021-05-24 Accepted:2021-08-25 Online:2021-09-15 Published:2021-09-09

摘要: 为探究不锈钢S30403在循环水工况下的耐腐蚀性能并指导选材,采用慢应变速率拉伸试验、循环动电位极化等方法分别考察了该材料在不同氯离子浓度和温度循环水中的耐应力腐蚀和耐点蚀性能。结果表明:在介质温度为60 ℃及以下、氯离子浓度不超过10 000 mg/L的循环水中,S30403无应力腐蚀开裂敏感性,可以满足水冷器中循环水侧工况下耐应力腐蚀开裂性能;在氯离子浓度高于250 mg/L的40~60 ℃的循环水中,S30403具有点蚀敏感性,在此工况下,该材质长期服役存在发生点蚀的风险。

关键词: S30403, 循环水, 氯离子, 点蚀, 应力腐蚀开裂

Abstract: In order to explore the corrosion resistance of stainless steel S30403 in circulating water and guide the selection of materials, this paper adopts slow strain rate tensile test, cyclic dynamic potential polarization and other methods to study the stress corrosion and pitting resistance of the material in circulating water with different chloride ion concentration and temperature. The results show that: when the medium temperature is 60 ℃ and below and the chloride ion concentration does not exceed 10 000 mg/L in circulating water, there’s no stress corrosion cracking sensitivity in S30403, which can meet the stress corrosion cracking resistance in the circulating water of water cooler; when the chloride ion concentration is higher than 250 mg/L and the temperature is 40~60 ℃ in the circulating water, there’s pitting corrosion sensitivity in S30403; under such condition, the S30403 will be at risk of pitting corrosion in long-term service.

Key words: S30403, circulating water, chlorine ion, pitting corrosion, stress corrosion cracking/SCC