液压油缸龟裂耐蚀层在煤井湿大气中的腐蚀行为与机理 液压油缸作为重工业的重要组成部分，在煤矿企业中有着不可或缺的地位。而煤井中的环境恶劣，液压油缸不但会受到各种撞击使得油缸耐蚀层遭到破坏，同时煤井大气中含有S、SO2、Cl-等与液压油缸基体发生电化学腐蚀，导致液压支架泄漏造成企业损失，更甚人员伤亡。研究煤井大气中液压油缸龟裂耐蚀层的腐蚀行为与机理成为重工业企业关注的话题。 从山西吕梁新龙重工高分子科技有限公司取回液压油缸，并且从相关部门取得煤井环境中S2-、Cl-的浓度，用0.04 mol/L NaHSO3＋0.002 mol/L NaCl溶液模拟煤井湿大气环境。首先，通过耐蚀层与基体腐蚀后在金相显微镜（OM）下腐蚀形貌的对比，得到耐蚀层的耐微观形貌与基体有所不同。其次，通过做电化学实验得到试样的极化曲线，为分析试样在腐蚀时间内变化情况做铺垫。最后，使用JSM-6010plus扫描电子显微镜（SEM）和能谱仪（EDS）分别观察试样腐蚀前后不同时间点的微观腐蚀形貌及元素分布，其中微观形貌主要用来判断占据腐蚀主导地位的类型，而元素分布用来讨论液压油缸龟裂耐蚀层在煤井湿大气中的腐蚀机理。经过观察，S元素是引起液压油缸在煤井湿大气中腐蚀的主要因素。 关键词：液压油缸；耐蚀层；煤井湿大气；腐蚀；锈层 Abstract As an important part of heavy industry, hydraulic cylinder plays an indispensable role in coal mining enterprises. In the coal mine, the environment is bad. The hydraulic cylinder will not only be damaged by various kinds of impact, but also contain S, SO2, Cl- and so on, which will cause electrochemical corrosion. The research on the corrosion behavior and mechanism of the cracked corrosion resistant layer of hydraulic cylinder in the atmosphere of coal mine has become a hot topic for heavy industry enterprises. The hydraulic cylinder was taken back from Shanxi Xin-long heavy industry Polymer Technology Co., Ltd., and the concentrations of S2- and Cl- in coal mine environment were obtained from relevant departments. The wet atmospheric environment of coal mine was simulated with 0.04 mol/L NaHSO3＋0.002 mol/L NaCl mixed solution. First of all, the microstructure of the corrosion-resistant layer is different from that of the substrate by comparing the corrosion-resistant layer with the substrate at 200 times and 500 times under the optical microscope (OM). Secondly, the polarization curves of the samples were obtained by electrochemical experiments, which paved the way for analyzing the corrosion morphology of the samples. Finally, jsm-6010 plus scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) were used to observe the micro corrosion morphology and element distribution at different time points before and after corrosion. The micro morphology was mainly used to determine the dominant type of corrosion, and the element distribution was used to discuss the corrosion mechanism of hydraulic cylinder cracking corrosion resistant layer in wet atmosphere of coal mine. It is observed that S element is the main factor causing corrosion of hydraulic cylinder in wet atmosphere of coal well. Keywords: Hydraulic cylinder; Corrosion resistant coating; Wet atmosphere of coal mine; Corrosion; Rust layer 目 录 第1章 引 言 1 1.1 课题来源及背景 1 1.2 液压油缸简介 1 1.3 液压油缸腐蚀现状 2 1.3.1 液压油缸腐蚀行为 2 1.3.2 防腐表面处理工艺 3 1.4 国内外研究现状 4 1.4.1 国内研究现状 4 1.4.2 国外研究现状 5 1.5 研究内容与意义 5 1.5.1 研究内容 5 1.5.2 研究目的和意义 5 第2章 实验材料与方法 6 2.1 实验材料制备 6 2.2 实验方法 6 2.2.1 加速腐蚀实验 6 2.2.2 电化学实验 7 2.3 实验试剂及仪器 7 2.3.1 实验试剂 7 2.3.2 实验仪器 7 第3章 结果分析与讨论 8 3.1 试样金相组织 8 3.2 试样动力学曲线 9 3.2.1 总体极化曲线 9 3.2.2 间隔48 h极化曲线 11 3.2.3 拟合曲线 12 3.3 锈层表面形貌 13 3.4 锈层物相组成 16 第4章 结论与展望 17 4.1 结论 18 4.2 展望 18 参考文献 19
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