【摘要】 目的通过研究换流阀冷却系统均压电极结垢机理,分析结垢的过程、影响因素、形成规律,总结结垢的根本原因,再根据分析结论提出均压电极腐蚀结垢的综合整治措施,形成改进技术方案。方法先通过文献分析国内外均压电极研究进展并进行总结,找出均压电极结垢的相关影响因素,通过试验验证,明确均压电极结垢的主要过程和影响结垢的主要因素,最后根据试验结果提出合理的抑制或减轻结垢的措施。结果均压电极结垢的主要影响因素是铝制散热器的电化学腐蚀及流体冲刷腐蚀,腐蚀产物在均压电极部位汇聚、沉积,导致结垢。结垢过程为:散热器内表面发生的化学腐蚀以及流体喘振造成的磨损腐蚀二者协同,相互加强,致使铝元素转化为离子形态进入循环系统冷却介质中,并在均压电极电场作用下吸附至电极表面,从而在电极表面形成结垢。结论均压电极结垢与水冷系统的电化学腐蚀和流体冲刷有关,采用深度除盐水质精处理的方式去除冷却水中的致垢离子,能有效减缓均压电极的结垢。更多还原

【Abstract】 By studying the scaling mechanism of equalizing electrodes in the cooling system of converter valves, the scaling process, influencing factors and forming rules are analyzed, and the basic causes of corrosion and scaling are summarized. Based on the results of the research, the comprehensive treatment measures for scaling of equalizing electrodes are formed to improve the technical scheme. Through literature analysis and summary of the research progress of equalizing electrodes at home and abroad, find out the related factors of scaling of equalizing electrodes, and then through test verification, clear the main process of scaling of equalizing electrodes and the main factors affecting scaling. Finally, according to the experimental conclusions, put forward reasonable anti-corrosion measures to inhibit or reduce scaling. The results show that the main factors affecting scaling of equalizing electrodes are electrochemical corrosion and fluid erosion corrosion of aluminum radiators. The corrosion products converge and deposit at the equalizing electrodes, resulting in scaling. The scaling process is as follows: the chemical corrosion on the inner surface of radiator and the wear corrosion caused by fluid surge are synergistic and mutually reinforcing, resulting in the transformation of aluminum elements into ionic forms and entering the cooling medium of circulating system, which are adsorbed to the surface of the electrode due to the electric field of the equalizing electrode, and over time, the formation of a junction on the surface of the electrode. Scaling of equalizing electrodes is related to electrochemical corrosion and fluids scouring in water cooling system. Scaling ions in cooling water can be removed by deep desalination, which can effectively slow down scaling of equalizing electrodes.更多还原