S<sup>2-</sup>对316L不锈钢在模拟油田污水中的腐蚀行为影响研究

doi:10.11902/1005.4537.2020.255

中国腐蚀与防护学报

2021, Vol. 41

Issue (5): 625-632 DOI: 10.11902/1005.4537.2020.255

研究报告

本期目录 | 过刊浏览

S^2-对316L不锈钢在模拟油田污水中的腐蚀行为影响研究

张龙华¹, 李长君², 潘磊², 韩思柯¹, 王昕¹, 崔中雨¹(

)

^1.中国海洋大学材料科学与工程学院青岛 266100
^2.新疆宝莫环境工程有限公司克拉玛依 834000

Corrosion Behavior of 316L Stainless Steel in Simulated Oilfield Wastewater

ZHANG Longhua¹, LI Changjun², PAN Lei², HAN Sike¹, WANG Xin¹, CUI Zhongyu¹(

)

^1.School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
^2.Xinjiang Baomo Environment Engineering Co. Ltd. , Karamay 834000, China

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摘要:

研究了不同浓度S^2-对316L不锈钢在模拟油田污水中的腐蚀行为的影响。通过电化学测试和XPS等方法分析了S^2-对316L不锈钢在油田污水中电化学及表面膜层性能的影响。结果表明，S^2-的存在加速316L不锈钢的腐蚀，并且随着S^2-浓度的升高，腐蚀倾向增大，耐蚀性下降。XPS结果显示，316L不锈钢钝化膜中出现了FeS，阻碍了钝化膜的进一步生长，外层钝化膜疏松，保护性降低。

关键词 ： 316L不锈钢, 油田污水, 硫化物, 钝化膜

Abstract：

The influence of S^2- concentration on the corrosion behavior of 316L stainless steel in a simulated oilfield wastewater was studied by means of electrochemical technique and X-ray photoelectron spectroscopy (XPS). The results show that the existence of S^2- can accelerate the corrosion of 316L, and with the increase of S^2- concentration, its corrosion tendency increases and the corrosion resistance decreases. XPS results demonstrate that FeS presents in the passive film of 316L stainless steel, which hinders the further growth of the film. Moreover, the outer layer of passive film is loose, therewith the protection performance of the film is deteriorated.

Key words： 316L stainless steel oilfield wastewater sulfide passive film

收稿日期: 2020-12-09

ZTFLH:

TG172

基金资助:山东省重点研发计划公益类专项(2019GHY112050)

通讯作者: 崔中雨 E-mail: cuizhongyu@ouc.edu.cn

Corresponding author: CUI Zhongyu E-mail: cuizhongyu@ouc.edu.cn

作者简介: 张龙华，男，1995年生，硕士生

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引用本文:

张龙华, 李长君, 潘磊, 韩思柯, 王昕, 崔中雨. S^2-对316L不锈钢在模拟油田污水中的腐蚀行为影响研究[J]. 中国腐蚀与防护学报, 2021, 41(5): 625-632.
Longhua ZHANG, Changjun LI, Lei PAN, Sike HAN, Xin WANG, Zhongyu CUI. Corrosion Behavior of 316L Stainless Steel in Simulated Oilfield Wastewater. Journal of Chinese Society for Corrosion and protection, 2021, 41(5): 625-632.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.255 或 https://www.jcscp.org/CN/Y2021/V41/I5/625

图1 316L不锈钢在不同S2-浓度模拟石油污水中的动电位循环极化曲线

图2 316L不锈钢在不同浓度S2-溶液中及电位下的I-t变化曲线

图3 不同S2-浓度下稳态电流密度与施加电势的关系图

图4 不同S2-浓度下随电位变化的Nyquist图和Bode图

图5 用于解释316L不锈钢表面钝化膜阻抗谱的等效电路模型

表1 等效电路得到的EIS拟合参数值

图6 316L不锈钢在-0.1 VSCE电势下形成的钝化膜内的主要元素的XPS谱

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