稀土元素和固溶处理对Al阳极电化学性能的影响

对Al-Zn-In-Sn-Mg和Al-Zn-In-Sn-Mg-RE 2种Al合金 阳极进行固溶处理，测定了经固溶处理和未经固溶处理的阳极在20℃和65℃的3%NaCl溶液中 的电化学性能 .结果表明,高温下Al阳极电流效率普遍下降，腐蚀变得不均匀;添加RE的固 溶处理阳极在65℃时性能优良；固溶处理可改善Al阳极在高温介质中的性能.讨论了RE及固 溶处理对高温介质中Al阳极性能的影响.     

预处理及氧化工艺对阳极氧化铝膜结构有序度的影响

采用硫酸阳极氧化工艺制备了多孔阳极氧化铝膜,采用扫描电子显微镜对多孔氧化铝膜的形貌进行表征。分别讨论了高温退火和二次氧化对多孔阳极氧化铝膜多孔结构的有序度的影响。试验结果表明,高温退火和二次氧化对提升阳极氧化铝膜的结构有序度起了很大作用。     

AlF3添加剂和焙烧温度对铝电解炭阳极过电位的影响

在实验室制备各类AlF3掺杂试验阳极，在测试其基本物理化学性能的基础上，采用“改进断电流法”进行阳极过电位测试，研究AlF3添加剂和阳极焙烧温度对阳极过电位的影响。结果表明：在一定条件下，阳极中添加AlF3既可降低阳极的空气／CO2反应活性，也可降低阳极过电位；受高温脱S等因素的影响，阳极的电化学活性及其空气／CO2反应活性并未随着焙烧温度的提高相应降低。     

粘胶纤维钽喷丝头熔盐阳极化表面处理及应用

喷丝头是化学纤维纺丝机上的关键零件。本文对钽喷丝头表面在高温溶盐中阳极化强化的工艺技术进行了研究，试验结果表明，在适合的熔盐温度、阳极化电压、电流及阳极化时间等工艺参数条件下，喷丝头阳极化处理后在其表面形成了高硬度并硬耐碱腐蚀的改性层，这一改性层的存在使得喷丝头的抗变形、抗划伤和耐碱腐蚀性能大大地提高，纺丝性能亦有所改善。阳极化强化的钽喷丝头已应用于生产实践，可取代黄铂金喷丝头，使生产成本降低。     

纳米陶瓷基铝电解阳极防氧化技术的工业应用

本文主要通过在预焙阳极表面喷涂纳米陶瓷基高温防氧化涂层材料的方法进行阳极防氧化涂层材料的规模化工业应用,并对应用结果进行分析.结果表明:阳极防氧化涂层材料对保持阳极几何外形规整性有较大作用,尤其是在下料处对阳极的规整性保护较好;使用阳极防氧化涂层材料后,涂层阳极比未涂层阳极延长一天换极周期;阳极防氧化涂层材料使用后原铝...     

一种油田深井用新型耐高温锌合金牺牲阳极

为解决某油田4 000m深井TP110-3Cr套管外腐蚀问题,研制了一种新型耐高温锌合金牺牲阳极。采用电化学技术对阳极材料进行了极化曲线和电流效率测试。结果表明:在80℃时,阳极极化曲线较平缓,开路电位较负,无高温"逆转"现象,电流效率大于80%,腐蚀均匀,腐蚀产物易脱落。在模拟某油田地层水条件下,评估了新型阳极的高温防腐蚀性能。结果表明:新型锌合金牺牲阳极在125℃以下,可有效保护套管;在130℃时,阳极发生断裂失效,无法继续使用。     

油田油水井高温牺牲阳极保护技术

对油田油水井油套管及井下设施的腐蚀状况进行了介绍。针对高温条件下的严重腐蚀,常用缓蚀剂保护方法具有局限性,提出了高温牺牲阳极阴极保护技术,可以解决高温腐蚀的问题。     

基于卤素效应的阳极氧化技术提高Ti48Al5Nb合金抗高温氧化性能

采用电化学阳极氧化技术在含NH_4F的乙二醇电解液中对Ti48Al5Nb合金进行阳极氧化处理,以获得富铝含氟阳极氧化膜。研究了阳极氧化处理对Ti48Al5Nb合金在1000℃空气中的氧化行为及氧化膜组成和结构的影响。结果表明:阳极氧化处理的Ti48Al5Nb合金经高温氧化后表面可形成连续、致密的Al_2O_3氧化膜,且氧化膜与基体具有良好结合力,有效阻止了氧向内扩散,进而显著提高了合金的抗高温氧化性能。经1000℃氧化100 h后,阳极氧化试样增重由未经阳极氧化处理试样的26.73 mg/cm~2降至1.18 mg/cm~2。同时,阳极氧化处理改变了合金的氧化机制,抑制了氧化膜/基体界面处富Nb层的出现。阳极氧化提高Ti48Al5Nb合金抗高温氧化性能是由于氧化膜中F在高温氧化过程中表现出的"卤素效应"所致。     

小块阳极糊成型后的冷却试验及冷却后糊块表面附着水的测定

为解决自焙阳极铝电解槽的环保问题，采用高温沥青作粘结剂生产自焙阳极糊已成趋势，本试验和测定可为解决高温沥青糊流动性问题而生产小块糊时的设计和生产技术条件提供参考数据。     

一种新型特种合金切割设备的研制和应用

利用电加工阳极—机械加工原理，采用高速运行的钢带式电极进行复合放电切割，解决了大直径、高温、高强度特种合金材料切割的技术难题，取得了显著的经济效益，具有推广价值。     

铝用阳极中微量元素的来源、危害及生产中的检测和控制

针对目前国内大部分铝厂及预焙阳极生产厂家对阳极含有的微量元素重视不足的状况,从阳极中微量元素的来源、危害及生产中的检测和控制这四个方面,结合本厂生产实践,对这一问题进行了详细论述。     

油井管杆牺牲阳极防腐装置的研制与应用

针对缓蚀剂在油井管杆防腐时时存在不足,研制出了牺牲阳极腐蚀装置。并根据实际需要设计了三种不同的结构形式。经现场１７口井应用,防腐蚀效果良好。为偏磨井及高油气比井的防腐蚀治理探明了一条可行之道。     

钢质管道内壁采用涂层和线状牺牲阳极联合保护

介绍了在国内某油田研究开发的管线内涂层和牺牲阳极联合防腐技术，线状牺牲阳极应用于管线内壁保护，保护效果显著。     

新型深井阳极应用技术

为克服深井阳极运行中产生的气阻缺隙,一种贵金属氧化物(MMO)、免维修的新型深井阳极已成功应用于多个工程。以实例的方式介绍此类深井阳极的设计、安装过程以及在某供气管线上的运行情况。此新型深井结构合理,克服了“气阻”的危害,地表土壤电阻低,沿线电位降幅小且均匀,保护效果好。     

Cup-shaped functionally gradient NiFe<Subscript>2</Subscript>O<Subscript>4</Subscript>-based cermet inert anodes for aluminum reduction

Application of inert anode and wet-table cathode technology for aluminum reduction will result in significant energy and environmental benefits, so it has been a research focus for several decades. The candidate as inert anode concentrates on oxide ceramic, cermet, and alloy. This paper reviews briefly the research progress and presents the achievements of Central South University, Changsha, China, in developing an NiFe₂O₄-based cermet inert anode, which includes the preparation and optimization of material performance, the joint between the cermet anode and metallic bar, as well as the results of electrolysis testing for a large inert anode group. At the same time, the problems for NiFe₂O₄-based cermet inert anode faced are discussed.     

The influence of coke source on anode performance

The role of anode raw material has long been debated in the aluminum smelting industry. By examining data accumulated from two similar smelting operations of Aluminium Pechiney, this article focuses on the differences in performance of anodes that can be attributed to the raw materials. The results suggest that good anode performance can be obtained for a range of cokes, provided that the operation is well designed and carefully operated.     

Ti Anode with Ti-Mn Coating

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钙钛矿结构固体氧化物燃料电池阳极材料研究

钙钛矿型氧化物(ABO3)由于其混合导电能力及其在高温氧化还原气氛下具有较好电催化活性和化学稳定性,而且对硫、碳、氧具有良好的容耐性,因此被广泛应用于作为固体氧化物燃料电池的阳极材料.概述了阳极材料的特点及钙钛矿结构的阳极材料的进展情况,对钙钛矿结构的阳极材料的制备方法及性能进行了总结.     

Characteristics of electrolyzed anode water as a display cleaning medium

RCA cleaning has been intensively studied, and during the last ten years has been modified to meet high integration and environmental requirements. Ozonized, hydrogenised, or electrolyzed water cleaning technologies are being developed in order to fulfil these requirements. However, to date, the proposed approaches have not broken through the RCA paradigm such as SC1 and SC2 steps. In this work, anode water of electrolysis was applied to clean particles and organics as well as metals, based on the Pourbaix concept, and as a test vehicle, MgO particles were introduced to verify the new concept. The electrolyzed water was generated by an electrolysis reaction, which involves anode and cathode waters. The anode water is very oxidative and low in pH, which may be suitable to the present cleaning requirements. NH₄Cl solution was supplied as an electrolyte to increase oxidative power, and the obtained oxidation-reduction potential (ORP) and pH for the anode water (AW) were more than 900 mV and 3.1, respectively. MgO particles were immerged in the anode water and the weight losses due to dissolution were measured with time. Weight losses were ranged from 100 to 500 μg for 1 to 2 g of substrate weight. Therefore, it was concluded that the cleaning radicals in the anodic water were at least in the range of 1 to 5E20 ea per 250 ml anode water, equivalent to 1E18 ea/cm³. Hence, the anode water could be effectively applied to semiconductor cleaning, since 1E10 to 15 ea/cm³ of contamination is treated. In addition, this approach does not develop micro-roughness on hydrophobic surfaces while it does so on the native silicon oxide. It is believed that the anode water may be effective even for nano-particle cleaning since the particle removal concept is not based on double layer repulsion but on dissolution, similar to metal removal.