P110S油套管在微含硫环境中的腐蚀行为研究

doi:10.11902/1005.4537.2022.126

中国腐蚀与防护学报

2023, Vol. 43

Issue (2): 371-376 CSTR: 32134.14.1005.4537.2022.126 DOI: 10.11902/1005.4537.2022.126

中国腐蚀与防护学报编委、青年编委专栏

本期目录 | 过刊浏览

P110S油套管在微含硫环境中的腐蚀行为研究

万红霞(

), 刘重麟, 王子安, 刘茹, 陈长风

中国石油大学 (北京) 新能源与材料学院北京 102249

Corrosion Behavior of P110S Oil Casing Steel in Sulfur Containing Environment

WAN Hongxia(

), LIU Chonglin, WANG Zian, LIU Ru, CHEN Changfeng

School of New Energy and Materials, China University of Petroleum, Beijing 102249, China

全文: PDF(3774 KB) HTML

摘要:

采用不同含量的Na₂S来模拟不同的含硫环境，利用挂片浸泡实验研究P110S钢级油套管在含硫体系中的腐蚀行为；利用电化学测试研究了其在不同含硫浓度中电化学特征；利用扫描电镜、激光共聚焦、XRD以及拉曼光谱对样品表面的腐蚀产物和形貌进行了表征。结果表明，P110S钢级油套管钢在含硫体系中发生严重的腐蚀，腐蚀速率和腐蚀电流密度均随含硫浓度增大而增大，腐蚀类型由均匀腐蚀转变为点蚀，腐蚀产物疏松。

关键词 ：油套管, 含硫环境, 腐蚀行为

Abstract：

Casing is an important equipment in oil and gas production industry, at present, the oil casing steels used in the field are mainly K55, N80, L80-13Cr and P110 steel grade etc. With the development of oil and gas fields into deep formations, the casing services in H₂S containing environment. Based on this condition, different concentrations of Na₂S were used to simulate sulfur-containing environment, and the corrosion behavior of P110S steel was studied in sulfur-containing solutions by means of immersion test, electrochemical workstation scanning electron microscope, laser confocal microscope, XRD and Raman spectroscope. The results show that the P110S steel suffered from severe corrosion in sulfur-containing solutions. The corrosion rate and corrosion current density increased with sulfur concentration. The corrosion morphology changed from uniform corrosion to pitting corrosion, and the corrosion products were loose.

Key words： oil casing sulfur-containing environment corrosion behavior

收稿日期: 2022-04-25 32134.14.1005.4537.2022.126

ZTFLH:

TG147

基金资助:国家自然科学基金(52101112)

作者简介: 万红霞，女，1986年生，博士，讲师

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引用本文:

万红霞, 刘重麟, 王子安, 刘茹, 陈长风. P110S油套管在微含硫环境中的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2023, 43(2): 371-376.
Hongxia WAN, Chonglin LIU, Zian WANG, Ru LIU, Changfeng CHEN. Corrosion Behavior of P110S Oil Casing Steel in Sulfur Containing Environment. Journal of Chinese Society for Corrosion and protection, 2023, 43(2): 371-376.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.126 或 https://www.jcscp.org/CN/Y2023/V43/I2/371

图1 P110S钢在不同浓度Na2S溶液中浸泡7 d后的SEM像

图2 P110S钢在不同浓度Na2S溶液中浸泡7 d后的腐蚀形貌CLSM图以及截面SEM像

图3 P110S钢在不同浓度Na2S溶液中浸泡7 d后去除腐蚀产物的SEM像

图4 基体及溶液中腐蚀产物的XRD谱

图5 腐蚀产物的拉曼光谱图

图6 P110S钢的电化学测试结果

表1 图6中电化学阻抗谱的拟合结果及极化曲线的拟合结果

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