| 高矿化度矿井水中螺纹钢锚杆点蚀机制研究 |
| |
| 引用本文： | 褚晓威,鞠文君,付玉凯. 高矿化度矿井水中螺纹钢锚杆点蚀机制研究[J]. 矿业科学学报, 2021, 6(3): 305-313. DOI: 10.19606/j.cnki.jmst.2021.03.007 |
| |
| 作者姓名： | 褚晓威 鞠文君 付玉凯 |
| |
| 作者单位： | 中国矿业大学(北京)能源与矿业学院,北京 100083;中煤科工开采研究院有限公司,北京 100013;煤炭科学研究总院开采研究分院,北京 100013;中煤科工开采研究院有限公司,北京 100013;煤炭科学研究总院开采研究分院,北京 100013 |
| |
| 基金项目： | 国家自然科学基金52004126国家自然科学基金51804159天地科技开采设计事业部科技创新基金KJ-2018-TDKCZL-13 |
| |
| 摘 要： | 受地下水侵蚀及开采环境影响,锚杆易发生腐蚀甚至断裂,点蚀等局部腐蚀形式通常是锚杆失效的主要源头.为研究螺纹钢锚杆在腐蚀性矿井水中的点蚀行为,采用金相、电化学及显微视频等手段,观测了4种锚杆点蚀发展过程并初步揭示其形成机制.结果表明,锚杆的点蚀易发生在夹杂物处,夹杂物及界面处基体优先溶解形成界面沟槽并出现局部酸化,从而进...
|
| 关 键 词： | 高矿化度矿井水 螺纹钢锚杆 点蚀 夹杂物 界面沟槽 |
| 收稿时间： | 2020-11-07 |
Study on pitting mechanism of rebar rockbolt in highly-mineralized mine water |
| |
| Affiliation: | 1.School of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China2.CCTEG Coal Mining Research Institute, Beijing 100013, China3.Mining Institute, China Coal Research Institute, Beijing 100013, China |
| |
| Abstract: | Corrosion and abnormal failure of rockbolts often occur in the mine water and complex environment.It is found that local corrosion such as pitting is usually the main origin of corrosion failure.Pitting process and mechanism in simulating corrosive mine water of four rockbolts were tested and analyzed with a comprehensive method including metallographic examination, electrochemical experiments and video microscope.The results showed that rockbolt steel was prone to pitting corrosion due to the inclusions.The pitting mechanism was as follows: The inclusions were preferentially dissolved, producing granular corrosion products and forming interface grooves.Local acidification in grooves accelerated the dissolution and exfoliation of matrix and inclusions, which produced etching pits.The acceleration effect of interface grooves on corrosion was verified by the comparison of polarization curves of different electrodes. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《矿业科学学报》浏览原始摘要信息 |
|
点击此处可从《矿业科学学报》下载免费的PDF全文 |
|
