汪峰,杜晓东,吴辰,蒋延涛.FV(520)B 不锈钢高温高压条件下硫化腐蚀初始阶段机理研究[J].表面技术,2014,43(6):16-21,58.
WANG Feng,DU Xiao-dong,WU Chen,JIANG Yan-tao.Study on Sulfidation Mechanism at Primary Stage of FV(520)B Stainless Steel at High Temperature and High Pressure[J].Surface Technology,2014,43(6):16-21,58 |
| FV(520)B 不锈钢高温高压条件下硫化腐蚀初始阶段机理研究 |
| Study on Sulfidation Mechanism at Primary Stage of FV(520)B Stainless Steel at High Temperature and High Pressure |
| 投稿时间：2014-06-11 修订日期：2014-12-10 |
| DOI： |
| 中文关键词: XPS 阳离子空位缺陷 硫化腐蚀 |
| 英文关键词:XPS cation vacancy defect sulfidation corrosion |
| 基金项目:国家重点基础研究发展计划(2011CB013402);安徽省教育厅产学研合作重点项目(KJ2012A232) |
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| Author | Institution |
| WANG Feng | School of Materials Science and Engineering,Hefei University of Technology, Hefei 230009, China |
| DU Xiao-dong | School of Materials Science and Engineering,Hefei University of Technology, Hefei 230009, China |
| WU Chen | School of Materials Science and Engineering,Hefei University of Technology, Hefei 230009, China |
| JIANG Yan-tao | School of Materials Science and Engineering,Hefei University of Technology, Hefei 230009, China |
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| 中文摘要: |
| 目的 研究高温高压条件下 FV(520)B 不锈钢硫化初始阶段的腐蚀机理。 方法 在 573 K,H2S 分压为 1. 5 MPa 条件下制备硫化腐蚀试样,利用 XPS,SEM 等分析硫化膜成分、元素含量及分布。 结果 硫化膜为双层膜结构,外层成分为 Fe7S8,FeS2 和 Ni(1-x)S,内层成分为 Fe7S8,FeS2,Ni(1-x)S 和 Cr2S3。 XPS 数据显示 Fe7S8,FeS2 中存在 Fe2+和 Fe3+,且 Fe3+平均原子数分数分别为 36. 53% 和 35. 78% ,Ni(1-x)S 硫化物中存在 Ni2+,Ni3+,且 Ni3+的平均质量分数约为 32. 08% 。 结论 铁镍硫化物的主要缺陷为阳离子缺陷,且缺陷浓度较高,内层中 Cr2S3 抑制 Fe,Ni 离子向外迁移,但硫化初期阶段 Cr2S3 的含量少,抑制作用不明显。 |
| 英文摘要: |
| Objective To investigate the sulfidation mechanism of FV(520)B stainless steel at primary stage. Methods The sulfidation specimen was prepared by the exposure of FV(520)B stainless steel to the atmosphere of 1. 5 MPa H2S at 300℃. XPS and SEM analysis techniques were applied to investigate the content, the distribution of element and the composition of the sulfide scale. Results The multilayered sulfide scale was composed of an outer layer of Fe7S8,FeS2, Ni(1-x)S and a inner layer of Fe7S8, FeS2, Ni(1-x)S, Cr2S3. XPS data indicated that Fe3+ and Fe2+ were found in Fe7S8 and FeS2 in all sputtered layers, and the average contents of Fe3+ were 36. 53% and 35. 78% , respectively. Ni2+ and Ni3+ were also observed in Ni(1-x)S and the content of Ni3+ was 32. 08% . Conclusion The data analysis demonstrated that the cation vacancy was the predominant defect in ferrous, nickel sulfide and the defect concentrations were high. Outward diffusion of Fe and Ni ions were constrained by Cr2S3 in the inner layer, but the inhibitory effect was not obvious due to the lack of Cr2S3 in sulfide scale at the primary stage of sulfidation. |
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