X70管线钢在内蒙古土壤中的腐蚀研究

腐蚀科学与防护技术, 2011, 23(1): 78-80.

X70管线钢在内蒙古土壤中的腐蚀研究

1.1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 0140102. Inner Mongolia Key Laboratory for Advanced Metals and Materials, Baotou 0140103. Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083>

基金项目: 国家自然科学基金项目(50461004)资助

关键词：土壤腐蚀 , soil corrosion , rate of corrosion , Inner Mongolia

Corrosion Behavior of X70 Pipeline Steel Buried in Soils at Inner Mongolia

FENG Dianchen , SONG Yiquan , LI Tao , LI Xiaogang

Keywords： X70 pipeline steel , X70管线钢 , 腐蚀率 , 内蒙古

在内蒙古五个地区土壤现场将X70管线钢埋片两年. 观察腐蚀产物的宏观和微观形貌, 并用EDS和XRD分析腐蚀产物, 计算X70管线钢在各试验站的两年腐蚀率. 研究结果表明: 经两年在五地区埋设的X70管线钢腐蚀率相差很大, 其中巴盟地区腐蚀率最大为8.3 g/dm²•a. X70管线钢在内蒙古五地区土壤中腐蚀两年的腐蚀率小于一年的腐蚀率. 腐蚀产物主要是Fe₃O₄和Fe₃O_4.

The corrosion of X70 pipeline steel in soils of five test sites at Inner Mongolia was studied by burying the steel specimens for two years. The corrosion morphology of the buried steel specimens as observed by SEM and the corrosion products were analyzed by using EDS and XRD. The results showed that the difference in corrosion rates of the steel was large in the five field soils. The maximum of corrosion rate 8.2924 g/dm²•d was observed for X70 buried at the test site at Bameng area. The corrosion rates of X70 for two years are lower than those for one year. The corrosion products were mainly consisted of Fe₃O₄ and FeO.

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