Analysis on the localized corrosion of hydraulic support after short-term service in coal mine
Analysis on the localized corrosion of hydraulic support after short-term service in coal mine
复制标题
煤矿液压支架短期使用后局部腐蚀分析
DOI：
10.1088/2053-1591/ac4d51
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发表时间：
2022-01
影响因子：
2.3
通讯作者：
Huihui Zhang
中科院分区：
文献类型：
--
作者：
Jie Chen;Yanjia Liu;Juntao Yuan;Chaofei Zan;Lezheng Huang;Huihui Zhang
抽象。液压支架的腐蚀给煤炭企业带来了巨大的经济损失。采用激光熔覆技术在不锈钢表面涂覆涂层，可以提高其耐磨性和耐腐蚀性。然而，在某煤矿使用25 d后，304不锈钢涂层液压支架出现了密集的腐蚀坑。目前，对这种激光熔覆层在实际矿井下的腐蚀效果研究较少。本文采用三维光学显微镜（OM）、扫描电子显微镜（SEM）、X射线能谱仪（EDS）、X射线光电子能谱仪（XPS）和X射线衍射仪（XRD）对氧化膜进行了表征。在此基础上，对局部腐蚀机理进行了探讨。腐蚀产物主要为（Fe，Cr）2 O3和CaCO 3的混合物。根据点蚀深度数据计算的最大点蚀速率。其通过超景深光学显微镜收集，为2.32 mm a-1。从沉积物下腐蚀和环境中的腐蚀性离子（Cl-和S2）-两个方面探讨了液压支架的腐蚀机理。
Abstract. The corrosion of hydraulic support has brought huge economic losses to coal enterprises. Using laser cladding stainless steel coating on the surface can improve its wear resistance and corrosion resistance. However, dense corrosion pits appeared on the hydraulic support coated 304 stainless steel after 25 d use in a coal mine. At present, there are few studies on the corrosion effect of this laser cladding layer under the actual mine. In this work, the oxide scales are characterized by 3D Optical Microscope (OM), Scanning Electron Microscopy (SEM) equipped with x-ray Energy Spectrometer (EDS), x-ray Photoelectron Spectrometer (XPS) and x-ray Diffraction (XRD) techniques. Based on the results, the localized corrosion mechanism is discussed. It was found that the corrosion products were mainly a mixture of (Fe,Cr)2O3 and CaCO3. The maximum pitting rate calculated from the depth data of pits. which were collected by ultra-depth of field optical microscopy, was 2.32 mm a−1. The mechanism of corrosion of hydraulic support was discussed form perspectives of the under-deposit corrosion and corrosive ions (i.e. Cl− and S2)− in the environment.
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