pH值对碳钢在高含硫油田水中腐蚀行为的影响

中国腐蚀与防护学报

2013, Vol. 33

Issue (2): 159-163

研究报告

本期目录 | 过刊浏览

pH值对碳钢在高含硫油田水中腐蚀行为的影响

吴新民¹ 邵秀丽¹ 薛晨² 张彩霞³ 方芳⁴

1. 西安石油大学西安 710065；
2. 延长油田股份有限公司安全环保质监部延安 716000；
3. 兰州城市学院兰州 730070；
4. 旭光中学芜湖 238321

Effects of pH on Corrosion Behavior of Carbon Steelin Oilfield Water with High Sulphide

WU Xinmin¹, SHAO Xiuli¹, XUE Chen², ZHANG Caixia³, FANG Fang⁴

1. Xi'an Shiyou University, Xi'an 710065, China;
2. Safety Environment Quality Supervision Department, Yanchang Oilfield Company, Yan’an 716000, China;
3. Lanzhou City College, Lanzhou 730070, China；
4. Xuguang Middle School, Wuhu 238321, China

全文: PDF(2177 KB)

摘要: 采用电化学测试方法和动态腐蚀失重实验并结合扫描电镜和能谱分析, 研究不同pH值下J55钢在高含硫油田水中的腐蚀行为。结果表明, 随着溶液pH值升高, J55钢阴极去极化作用减弱, 腐蚀速率下降。当pH值在5.6~7.2时, 腐蚀产物主要是疏松且易脱落的粗晶粒四方硫铁矿FeS_1-_x, 无法在碳钢表面形成保护膜, 形成大量腐蚀坑, 使碳钢表面腐蚀较严重；当pH值在8.7~11.0时, 腐蚀产物主要是氧化铁, 在碳钢表面形成了致密的保护膜, 阳极有明显的钝化现象, 碳钢表面腐蚀轻微。

关键词 ：油田水, 高含硫, 腐蚀, 极化曲线
中图分类号：, TG172, 文献标识码：, A, 文章编号：, 1005-4537(2013)02-0159-05

Abstract：The corrosion behavior of J55 carbon steel in oilfield water with high sulphide at different pH values was investigated by electrochemical measurement and dynamic corrosion mass loss method. The corrosion scales were analyzed by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The results showed that depolarization in cathode of the J55 carbon steel weakened and corrosion rate decreased as pH increased. When the pH was 5.6~7.2, the corrosion scale, which was mainly composed of mackinawite (FeS_1-_x) with coarse grains was loose and brittle. It fell off easily and was non-protective, leading to the serious corrosion on the carbon steel surface. When the pH was 8.7~11.0, strongly protective corrosion scale which was composed of iron oxide formed on the carbon steel surface and obvious passivation was found in the anode, leading to the slight corrosion on carbon steel surface.

Key words： oilfield water high sulphide corrosion polarization curve

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引用本文:

吴新民邵秀丽薛晨张彩霞方芳. pH值对碳钢在高含硫油田水中腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2013, 33(2): 159-163.
. Effects of pH on Corrosion Behavior of Carbon Steelin Oilfield Water with High Sulphide. Journal of Chinese Society for Corrosion and protection, 2013, 33(2): 159-163.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I2/159

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