煤炭工程 ›› 2023, Vol. 55 ›› Issue (1): 143-148.doi: 10.11799/ce202301026

• 研究探讨 • 上一篇    下一篇

矿井金属护网腐蚀机理与欠锌涂料防护研究

郭洋楠,常建鸿,何瑞敏,等   

  1. 1. 国能神东煤炭集团有限责任公司技术研究院
    2. 神华集团
    3. 国家能源集团神东煤炭集团乌兰木伦煤矿
    4. 北京化工大学
    5. 安徽理工大学地球与管理学院
    6. 煤炭科学技术研究院有限公司 矿用材料分院
    7. 煤炭科学技术研究院有限公司矿用油品分院
  • 收稿日期:2022-01-16 修回日期:2022-03-29 出版日期:2023-01-20 发布日期:2023-04-11
  • 通讯作者: 谢鳌 E-mail:xieao@mail.buct.edu.cn

Corrosive mechanism analysis and research on anti-corrosion by zinc-poor coating of protective steel nets in coal mine

  • Received:2022-01-16 Revised:2022-03-29 Online:2023-01-20 Published:2023-04-11
  • Contact: Xie Ao E-mail:xieao@mail.buct.edu.cn

摘要: 为解决煤矿井下锚网支护材料(金属护网)在顶板淋水的湿潮环境中腐蚀严重的问题,利用扫描电子显微镜、X射线衍射、傅里叶红外光谱和电化学测试等技术,分析了腐蚀产物形貌、结构及腐蚀机理|并设计研用颜料体积浓度为32%的环氧欠锌涂料,对取自现场的腐蚀金属护网进行涂装,研究了其施加涂料后在模拟顶板淋水浸泡作用下的耐腐蚀效果。结果表明:金属护网生成的锈蚀层为由α-FeOOH、γ-FeOOH、Fe2O3和Fe3O4组成的疏松多孔结构,难以长期阻止金属基体的腐蚀过程|采用环氧欠锌涂料直接涂装锈蚀金属护网,能够通过屏蔽隔离效应明显抑制腐蚀过程,降低腐蚀速率至0.001mm/a左右。

关键词: 防腐蚀涂料, 煤矿支护材料, 环氧欠锌涂料, 腐蚀产物, 金相分析, 腐蚀速率

Abstract: To solve the problems that seriously corrosive anchor net supporting materials (protective steel nets) in the wet environment of Shendong Coal Group Company, the scanning electron microscope, X-ray diffraction, Fourier transform infrared instrument and electrochemical test were conducted to analyze the morphology, structure and corrosive mechanism of protective steel nets (welded protective nets of 45# steel) taken from the coal lane, respectively. Besides, the anti-corrosion effect of protective steel net covered by the epoxy zinc-poor coating, which is composed of 32% of pigment volume concentration, was studied by immersion of simulated roof water. The results depict that the rust layer on the protective steel nets consist of α-FeOOH, γ-FeOOH, Fe2O3 and Fe3O4 with loose porous structure, leading to continuous corrosion process of the metal matrix. Meanwhile, the epoxy zinc-poor coating is valid to reduce the corrosive rate of protective steel nets down to around 0.001 mm/a by shielding effect. This strategy can effectively simplify the construction process, improve the corrosion resistance and prolong their lifespan of the protective steel nets in coal lane.

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