梁莹,张慧霞,郝福耀,李相波,胡鹏飞.新型高强不锈钢在海水中的腐蚀行为研究[J].装备环境工程,2022,19(7):93-99. LIANG Ying,ZHANG Hui-xia,HAO Fu-yao,LI Xiang-bo,HU Peng-fei.Corrosion Behavior of New High Strength Stainless Steel in Seawater[J].Equipment Environmental Engineering,2022,19(7):93-99.
新型高强不锈钢在海水中的腐蚀行为研究
Corrosion Behavior of New High Strength Stainless Steel in Seawater
  
DOI:10.7643/issn.1672-9242.2022.07.012
中文关键词:  高强不锈钢  奥氏体不锈钢  海水环境  腐蚀行为  耐蚀性  钝化膜中图分类号:TG172.5 文献标识码:A 文章编号:1672-9242(2022)07-0093-07
英文关键词:high strength stainless steel  austenitic stainless steel  seawater environment  corrosion behavior  corrosion resistance  passivation film
基金项目:
作者单位
梁莹 中国船舶重工集团公司第七二五研究所 海洋腐蚀与防护重点实验室,山东 青岛 2662371;中国石油大学华东,山东 青岛 2665802 
张慧霞 中国船舶重工集团公司第七二五研究所 海洋腐蚀与防护重点实验室,山东 青岛 2662371 
郝福耀 中国船舶重工集团公司第七二五研究所 海洋腐蚀与防护重点实验室,山东 青岛 2662371 
李相波 中国船舶重工集团公司第七二五研究所 海洋腐蚀与防护重点实验室,山东 青岛 2662371 
胡鹏飞 中国船舶重工集团公司第七二五研究所 海洋腐蚀与防护重点实验室,山东 青岛 2662371 
AuthorInstitution
LIANG Ying Key Laboratory of Marine Corrosion and Protection, 725th Institute of China Shipbuilding Industry Corporation, Shandong Qingdao 266237, China;China University of Petroleum East China, Shandong Qingdao 266580, China 
ZHANG Hui-xia Key Laboratory of Marine Corrosion and Protection, 725th Institute of China Shipbuilding Industry Corporation, Shandong Qingdao 266237, China 
HAO Fu-yao Key Laboratory of Marine Corrosion and Protection, 725th Institute of China Shipbuilding Industry Corporation, Shandong Qingdao 266237, China 
LI Xiang-bo Key Laboratory of Marine Corrosion and Protection, 725th Institute of China Shipbuilding Industry Corporation, Shandong Qingdao 266237, China 
HU Peng-fei Key Laboratory of Marine Corrosion and Protection, 725th Institute of China Shipbuilding Industry Corporation, Shandong Qingdao 266237, China 
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中文摘要:
      目的 确定新型高强不锈钢在海水环境中的耐蚀性能和腐蚀机理。方法 通过海水浸泡试验、动电位极化曲线和电化学交流阻抗测试考察新型高强不锈钢在海水环境中的腐蚀性能,并结合金相显微镜观察、X射线衍射分析(XRD)和X射线光电子能谱(XPS),分析该不锈钢的组织结构和钝化膜组成。结果 新型高强不锈钢在海水中的自腐蚀电位稳定在0.012~0.020 V,点蚀电位为1.10 V,保护电位为0.89 V。海水中浸泡45 d后,电化学阻抗值仍然保持在106 Ω.cm2数量级。这说明钝化膜表面并未出现点蚀的形核,钝化膜仍具有较好的保护性。该不锈钢具有典型的孪晶奥氏体结构,形成的钝化膜表层主要成分为FeOOH、Cr(OH)3等氢氧化物,内层成分主要为Fe3O4、Cr2O3、CrO3、单质Ni,具有较强的钝化膜修复能力。结论 该不锈钢在海水中具有良好的耐蚀性。
英文摘要:
      This paper is intended to study the corrosion resistance and determine the corrosion mechanism of new high strength stainless steel in seawater environment. In this paper, the corrosion resistence of the new high strength stainless steel in seawater environment were investigated by potentiometric polarization curve, electrochemical impedance test and seawater immersion test. The microstructure and passivation film composition of the stainless steel were analyzed by metallographic microscope observation, X-ray diffraction (XRD) analysis and X-ray photoelectron spectroscopy (XPS). The results show that the self-corrosion potential, pitting potential and protection potential of the new high strength stainless steel in seawater are stable in the range of 0.012~0.02 V, 1.10 V and 0.89 V, respectively. The electrochemical impedance value remained 106 Ω.cm2 after 45 days of immersion in seawater, which indicated that there was no nucleation of pitting corrosion on the surface of the passivation film, and the passivation film still had good protection. This is because the stainless steel has a typical twinning austenite structure, and the main components of the passivation film surface are FeOOH, Cr(OH)3 and other hydroxides, and the inner composition is mainly Fe3O4, Cr2O3, CrO3 and elemental Ni, which has a strong passivation film repair ability, and thus has a good corrosion resistance in seawater.
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