Full
Outline
Under the coupled action of high stress and aggressive media in deep mines, the support system is highly prone to structural failure due to stress-electrochemical coupled corrosion, which seriously threatens mine production safety. With the corrosion protection of bolts under a saline-alkali corrosive environment in a deep mine in Shandong taken as the engineering background, field investigation, laboratory tests, and numerical simulation were combined to investigate the variation law of the electrochemical corrosion rate of bolts after adding Cr2O3 corrosion inhibitor, and to comparatively analyze the corrosion evolution process of ordinary bolts and bolts with the corrosion inhibitor under the high-stress environment of deep mines. The results show that as the Cr2O3 concentration increases, the self-corrosion potential of the bolt rises from -1.062 V to -0.924 V, the corrosion current density decreases from 7.76×10-5 A/cm2 to 1.47×10-5 A/cm2, and the corrosion rate drops from 0.936 mm/a to 0.181 mm/a. The Cr2O3 corrosion inhibitor exhibits a significant inhibitory effect on electrochemical corrosion. The grouting body compressive strength test shows that with the increase of Cr2O3 concentration, both the 1 d and 7 d compressive strengths of the specimens present a trend of first increasing and then decreasing. The numerical simulation results show that after 1 500 d of corrosion, the ordinary bolt has large potential differences and concentrated current density, whereas the bolt with Cr2O3 has a uniform potential distribution. The total electrode corrosion thickness decreases from 68.7 μm to 0.182 μm, a reduction of 99.7%, and the surface concentrations of chloride, iron, and sodium ions on the anti-corrosion bolt are significantly lower than those on the ordinary bolt, indicating that the Cr2O3 corrosion inhibitor can achieve long-term inhibition of electrochemical corrosion under high-stress and high-corrosion environments.
38
10
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
