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| Study on metal corrosion evaluation method of polymer reinforcement materials for coal mine |
| Wang Jiyong 1,2,3 |
| 1. Test Branch, China Coal Research Institute, Beijing 100013, China; 2. State Key Laboratory of High Efficient Mining and Clean Utilization of Coal Resources, Beijing 100013, China; 3. National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control, Beijing 100013, China |
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Abstract In order to study the corrosion of polymer reinforcement materials on grouting equipment, according to GB/T 38498-2020, JB/T7901-2001 metal corrosion evaluation method, the corrosion rate of polymer reinforcement materials on carbon steel, copper and stainless steel was tested, and the metal corrosion grade of each component of reinforcement materials was evaluated. The results show that the corrosion rate of the reinforcement material to the metal is the largest and the corrosion grade is the most serious by using scheme ( II ). Using different test methods, the corrosion rate of each component of the reinforcement material to copper and stainless steel is basically the same, and the corrosion grade is basically no corrosion. However, the corrosion rate of carbon steel fluctuates greatly, and the corrosion grade changes from basically no corrosion to moderate corrosion. According to the analysis, it is easy to have a large deviation when using schemes (I) and (II) to evaluate the metal corrosion of reinforcement materials. When Scheme (III) is adopted, the metal corrosion rate of each component of the reinforcement material is relatively objective, and the test results are in good agreement with the actual corrosion results.
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