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介绍了38DD350型离子膜电解槽复极元件损坏的6种类型:复极元件槽框变形,复极元件阳极活性网和支撑网损坏,复极元件内漏,复极元件密封面翻边腐蚀,复极元件导电柱与阴、阳极底盘脱开,复极元件阳极面网活性层脱落。深入分析了其损坏原因,最后提出了4条预防措施:正确组装、维修电解槽,保证阴、阳极网面平整,发现膜泄漏、电解槽垫片泄漏和复极元件内漏时及时处理,严格工艺指标的控制。 相似文献
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介绍了38DD350型离子膜电解槽复极元件的结构。提出各种情况下复极元件的修复方法:重涂阴极、阳极;修补阴、阳极网断丝;修补复极元件内漏;修补导电柱的损坏;修补密封面;修复进出料管腐蚀仪及处理密封玻璃胶和阴极支撑网锈垢。 相似文献
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离子膜电解槽运行过程中,阳极极片的腐蚀情况有:应力腐蚀断裂,介质腐蚀,防腐蚀电极泄漏腐蚀,阳极受机械损伤发生腐蚀;阴极极片的腐蚀情况有;阴极极片脱落,阴极片铁锈堆积,膜阴极侧出现斑点和阴极穿孔。阴、阳极片被腐蚀后,性能明显下降,必须更换。新极片与重涂极片的使用性能相当,寿命相当,且用重涂极片要比用新极片每台阳极极片节约6.41万元,阴极极片节约2.7万元,因此建议用重涂极片更换被腐蚀的极片。 相似文献
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介绍了自主改造的膜极距NCHZ电解槽的运行数据,以及气相控制压力、意外停车自动连锁控制、极化整流装置等改进内容。针对改造后电解槽出现的2个单元槽电压升高及1张膜微漏的问题,提出解决方法。 相似文献
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对聚丙烯熔喷布及聚丙烯熔喷布用驻极母粒制备方法进行了介绍,针对现有驻极母粒制备方法的不足,对不同的主驻极剂材料、辅助驻极材料以及其之间的协同作用、制备工艺等展开了研究,通过以熔喷聚丙烯、柔顺剂、主驻极剂、辅驻极剂、成核剂、抗氧剂为原料,工艺要求主驻极剂均匀分散于辅驻极剂中,主驻极剂与辅驻极剂之间产生协同效应,获得性能良好的驻极母粒产品。在聚丙烯熔喷布喷丝过程,加入的驻极母粒产品,可以有效提高熔喷布表面电荷,通过测试熔喷布过滤效率,通过加入本方法制备的驻极母粒,细菌过滤效率(BFE)大于95%,聚丙烯熔喷布的综合过滤效率、抗热衰的性能、柔韧性得到大幅度提升。 相似文献
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介绍管式电除雾器中张紧式电晕极系统。设计采用横向张紧固定的新结构,对电晕极线作径向、轴向的双向约束固定,从而解决极线的摆动问题,保证了电场在高气速及气量波动下的操作稳定性。 相似文献
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分析INEOS电解单元槽阳极盘密封面泄漏的原因是:极盘的密封面和极网厚度不足1 mm。经密封面镀钯、处理漏点、平整极网、加入支撑条,修复阳极盘,解决了极网变形和密封面的腐蚀泄漏问题。 相似文献
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通过对染料敏化纳米晶体TiO2太阳能电池的对电极的结构进行改进,设计了一种可大容量储存电解质和补充电解质的新型对电极结构.当染料敏化纳米晶体TiO2太阳能电池因液态电解质挥发泄漏而失效时,可以对其进行液态电解质的及时补充,从而使失效的染料敏化纳米晶体TiO2太阳能电池重新恢复工作.该新型对电极结构为解决染料敏化纳米晶体TiO2太阳能电池由于液态电解质泄漏导致的寿命降低问题提供了一种新的解决方法. 相似文献
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Benzene oxidation in sulfuric acid at a glassy carbon electrode was investigated using voltammetric, chronoamperometric, and spectroscopic methods. The results are compared with those at a Pt electrode. Benzene was observed to be oxidized to benzoquinone presumably by active oxygen that was adsorbed on the GC electrode in the oxygen evolution region. It is concluded that oxidation at glassy carbon can produce benzoquinone or quinone-like compounds from an aqueous benzene solution. The applied potential for benzene oxidation should be less than 2.1 V vs RHE in order to prevent glassy carbon electrode damage by oxidation during long operation. 相似文献
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I. Portegies Zwart J.K.M. Jansen L.J.J. Janssen 《Journal of Applied Electrochemistry》2001,31(6):629-639
The GBC-reactor is based on the combination of a gas diffusion anode and a porous cathode. A theoretical model for gas diffusion electrode, valid at relatively low current densities, is derived. This is based on the pseudohomogeneous film model including an approximation of the Volmer–Tafel mechanism for the hydrogen oxidation kinetics. Results show a severe mass transfer limitation of the hydrogen oxidation reaction inside the active layer of the gas diffusion electrode, even at low current densities. Empirical formulae are given to estimate whether leakage of dissolved hydrogen gas into the bulk electrolyte occurs at specific process conditions. A simplified version of the model, the reactive plane approximation, is presented. 相似文献
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《Ceramics International》2017,43(6):4976-4983
In impedance spectroscopy testing of metal/ceramic multi-layers, such as thermal barrier coatings (TBCs), in order to avoid electric leakage, asymmetric electrode is widely adopted. However, how is electric field distribution in asymmetric electrode system, what error does it bring to measurement results, and how to modify these errors etc., are still not understood. In this study, electric field divergence in TBCs measurement induced by asymmetric electrode is investigated through solving a three-dimensional electric field equations numerically. The results show that the asymmetric electrode inevitably triggers divergence of electric field line, and as frequency decreases the divergence increases considerably. When Pt electrode diameter is chosen as 1 mm in ceramic coating, the errors in thickness measurement for both YSZ and TGO are 26.20% and 89.3%, respectively. The errors rise as both YSZ and TGO thicknesses increase, while the errors decrease as Pt electrode size increases. The error in thickness measurement for TGO layer is much larger than that for YSZ. Through present research, a scheme to eliminate the effect of electric field divergence on measurement error is proposed. 相似文献
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首先分析了现有城镇燃气管网遭受腐蚀发生泄漏的主要原因,提出了在涂敷绝缘层基础上采取阴极保护的必要性;然后介绍了阴极保护的方法、分类及特点;最后从设计、施工和使用等环节重点叙述了牺牲阳极法在城镇燃气管网保护中的应用。 相似文献