X100管线钢在盐渍土壤模拟溶液中的腐蚀行为

doi:10.11902/1005.4537.2013.244

中国腐蚀与防护学报

2015, Vol. 35

Issue (1): 33-37 DOI: 10.11902/1005.4537.2013.244

本期目录 | 过刊浏览

X100管线钢在盐渍土壤模拟溶液中的腐蚀行为

张秀云, 石志强(

), 王彦芳, 刘明星, 杨升升

中国石油大学 (华东) 材料科学与工程系青岛 266580

Corrosion Behavior of X100 Pipeline Steel in Simulated Solution of Alkaline Soil

ZHANG Xiuyun, SHI Zhiqiang(

), WANG Yanfang, LIU Mingxing, YANG Shengsheng

Department of Materials Science and Engineering, China University of Petroleum (Huadong), Qingdao 266580, China

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摘要:

采用失重法和电化学测试方法,并结合SEM,EDS和XRD测试,研究了X100管线钢在盐渍土壤-库尔勒土壤模拟溶液中的腐蚀行为与机理。结果表明：在库尔勒土壤模拟溶液中,X100管线钢的腐蚀为典型的活性溶解。随着腐蚀时间的延长,腐蚀趋势逐渐增大。平均腐蚀速率与瞬时腐蚀速率均呈现增大、减小再增大的趋势。EDS和XRD结果表明,腐蚀产物分为3层,表层为质地较疏松的棕红色γ-FeOOH,内层为较致密的黑色Fe₃O₄及少量FeS,中间层为黑色疏松态Fe₃O₄及FeS。Cl^-对X100钢的腐蚀起主导作用,少量的SO₄²^-也参与腐蚀反应,对腐蚀有一定影响。

关键词 ： X100管线钢, 库尔勒土壤, 碱性模拟溶液

Abstract：

The corrosion behavior of X100 pipeline steel in an artificial solution which aims to simulate the alkaline soil medium at Korla area of Xinjiang were investigated by weight-loss, electrochemical measurement, scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS) and X-ray diffractomater (XRD). Results show that the corrosion behavior of X100 pipeline steel in the simulated solution is a typical active dissolution corrosion. The corrosion tendency gradually increases with time. The average corrosion rate and the instantaneous corrosion rate all increase first, then decrease and increase again finally. The corrosion products exhibit a three layered structure composed of a surface layer of loosened brown red γ-FeOOH, a middle layer of black loosened Fe₃O₄and FeS and an inner layer of dense black Fe₃O₄ and FeS. It is also found that Cl^- plays an important role in X100 steel corrosion, and a small amount of SO₄²^- is also involved in the reaction which has certain influence on the corrosion.

Key words： X100 pipeline steel Korla soil alkaline simulation solution

ZTFLH:

TG172.4

基金资助:国家高技术研究发展计划项目 (2012AA09A203),山东省自然科学基金项目 (Q2008F12),中央高校基本科研业务费专项资金项目 (13CX06088A,14CX06062A和11CX04032A)及江苏省工程装备检测与控制重点建设实验室开放基金项目 (JSKLEDC201207) 资助

作者简介: null

张秀云，女，1989年生，硕士生

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引用本文:

张秀云, 石志强, 王彦芳, 刘明星, 杨升升. X100管线钢在盐渍土壤模拟溶液中的腐蚀行为[J]. 中国腐蚀与防护学报, 2015, 35(1): 33-37.
Xiuyun ZHANG, Zhiqiang SHI, Yanfang WANG, Mingxing LIU, Shengsheng YANG. Corrosion Behavior of X100 Pipeline Steel in Simulated Solution of Alkaline Soil. Journal of Chinese Society for Corrosion and protection, 2015, 35(1): 33-37.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2013.244 或 https://www.jcscp.org/CN/Y2015/V35/I1/33

图1 X100钢的显微组织

图2 试样腐蚀30和90 d后的宏观腐蚀形貌

图3 试样腐蚀1, 30, 60和90 d后的微观腐蚀形貌

图4 X100钢的平均腐蚀速率

图5 试样腐蚀1, 30, 60和90 d后的极化曲线

表1 极化曲线拟合结果

图6 腐蚀产物的XRD谱

图7 X100钢腐蚀60 d后的EDS结果

表2 X100钢腐蚀60 d后的EDS成分分析

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