研究目的: 近期开工的某高原铁路相对湿度大,受隧道内货物粉尘影响、高原地区设备维护条件差等因素影响,对接触网零部件防腐提出更高的要求。本文通过对接触网零部件腐蚀影响因素、常用防腐措施与接触网的适应性、锌镍渗层技术进行研究和试验对照,以期为高原高湿度区域接触网零部件防腐设计提供参考。
研究结论: (1)接触网零部件防腐性能受相对湿度、气温、大气介质等因素影响大,隧道内接触网零部件受大气、地下水和土壤等共同影响,更易腐蚀;(2)目前钢材质接触网零部件采用热浸镀锌防腐处理,少量特殊工点研究和采用了增加复合材料涂层、达克罗防腐等措施,但受接触网零部件工作环境和特点影响,局限性较大;(3)锌镍渗层防腐技术具有高耐蚀、高耐磨的特点,较传统热镀锌零部件,防腐寿命可提高147%;(4)相关技术用于高原高湿度地区铁路,可大幅提高接触网零部件的防腐性能。

Research purposes: A plateau railway recently started has high relative humidity, which puts forward higher requirements for the anti-corrosion of OCS parts due to the influence of cargo dust in the tunnel and poor equipment maintenance conditions in plateau areas. This paper studies and tests the corrosion influencing factors, adaptability of common anti-corrosion measures and OCS and zinc-nickel infiltration technology of OCS parts, so as to provide reference for the anti-corrosion design of OCS parts in high humidity area of plateau.
Research conclusions: (1) The anti-corrosion performance of OCS parts is greatly affected by relative humidity, air temperature, atmospheric medium and other factors. OCS parts in the tunnel are more likely to be corroded due to the joint influence of atmosphere, groundwater and soil. (2) At present, steel OCS parts are treated with hot-dip galvanizing for corrosion protection. A few special work sites have studied and adopted measures such as increasing composite coating, Dacromet corrosion protection. However, affected by the working environment and characteristics of OCS parts, it has great limitations. (3) The anti-corrosion technology of zinc-nickel infiltration coating has the characteristics of high corrosion resistance and high wear resistance. Compared with traditional hot-dip galvanized parts, the anti-corrosion life can be increased by 147%. (4) Relevant technologies and their application in railways in plateau high humidity areas can greatly improve the anti-corrosion performance of OCS parts.