Q235鋼和X70管線鋼在北美山地灰鈣土中的短期腐蝕行為

劉智勇; 王力偉; 杜翠薇; 王福明; 弓愛君; 李曉剛; Frank Cheng

doi:10.13374/j.issn1001-053x.2013.08.004

Q235鋼和X70管線鋼在北美山地灰鈣土中的短期腐蝕行為

doi: 10.13374/j.issn1001-053x.2013.08.004

1. 北京科技大學腐蝕與防護中心教育部腐蝕與防護重點實驗室, 北京 100083;
2. 北京科技大學冶金與生態工程學院, 北京 100083;
3. 北京科技大學化學與生物工程學院, 北京 100083;
4. 卡爾加里大學機械工程與制造系, 卡爾加里 T2N1N4, 加拿大

基金項目:

國家自然科學基金資助項目(50901041,51131001)

中國博士后基金資助項目(20100480196)

詳細信息

通訊作者:
杜翠薇,E-mail:dcw@ustb.edu.cn

中圖分類號: TG172.4
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- 被引次數: 0
出版歷程
- 收稿日期: 2012-05-29

Short-term corrosion behavior of Q235 steel and X70 pipeline steel in gray desert soil in North America

1. Key Laboratory for Corrosion and Protection of the Ministry of Education, Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3. School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
4. Department of Mechanical & Manufacturing Engineering, University of Calgary, Calgary T2N 1N4, Canada

摘要

摘要: 通過腐蝕失重速率試驗、腐蝕形貌特征的掃描電鏡觀察和X射線衍射分析以及土壤理化性質分析等手段研究了國產Q235鋼和X70管線鋼在加拿大中南部的山地灰鈣土中實地埋樣試驗一年后的短期腐蝕行為特征.結果發現Q235鋼和X70鋼的平均腐蝕速率和最大點蝕深度均比較接近,但Q235鋼點蝕密度明顯高于X70鋼;兩種鋼的腐蝕產物成分類似,均為FeOOH、Fe₃O₄和Fe₂O₃的復雜混合物,腐蝕產物層不致密,存在明顯的裂紋;兩種鋼表層土壤中均發現較多的硫酸鹽還原菌、硫化菌和異養菌,這些菌群的共同作用能夠加速腐蝕產物層下局部腐蝕的發生.
- 管線鋼 /
- 碳鋼 /
- 鋼腐蝕 /
- 土壤 /
- 細菌 /
- 點蝕
Abstract: The short-term corrosion behavior of Q235 and XT0 steel samples buried for one year in the test trench in a typical mountain sierozem area in Calgary, Canada was investigated by corrosion rate t, corrosion characteristic observation and analysis through scanning electrochemistry microscopy and X-ray diffraction, and soil physical and chemical properties analysis. It is found that Q235 steel has a close average corrosion rate and maximum pitting corrosion depth to X70 pipeline steel, but the former has an obviously higher pitting density than the latter. The corrosion products of these two metals are similar and mainly composed of FeOOH, Fe₂O₃ and Fe₃O₄, and the corrosion product layer is loose with cracks and not able to prevent these metals from corrosion. There are multiplex bacteria, such as sulphate reduction bacteria (SRB), sulphate oxidation bacteria (SOB) and heterotrophic bacteria in the soil attaching to the two steel samples, which are in cooperation to accelerate the occurrence of localized corrosion under the corrosion product layer due to the effects of their metabolic actions on corrosion processes.
- pipeline steel /
- carbon steel /
- steel corrosion /
- soil /
- bacteria /
- pitting