马氏体不锈钢无铬酐电解抛光液及其工艺研究

本文研究开发的磷酸－硫酸－聚乙二醇－硫脲电解抛光液及工艺可以对热处理后的Ｃｒ１３型马氏体不锈钢直接进行抛光，无需前处理，抛光效果好．抛光液中不含铬酐。     

铝的碱性电解抛光

对碱性环境下铝的电解抛光机理进行了分析，通过实验获得了寿命扫描光效果好的电解液，结果表明，采用碱性电解抛光法特别是碱性脉冲电解抛光法有很大的优点，成本低，操作温度低，抛光液寿命长，污染小，获得的表面反射率高，有较好的应用前景。     

3Cr13不锈钢低铬酐化学着色研究

讨论了３Ｃｒ１３不锈钢在含有添加剂的低浓度铬酐－硫酸溶液中,进行化学着色处理的工艺和各种添加剂对表面着色的影响。结果表明：铬酐含量可降至６０～８０ｇ／Ｌ,并根据着色时间的不同获得多种色彩的着色外观。着色膜层耐候性、耐磨性优良。     

发出新的光泽——板式换热器的电解抛光防止结垢

在流程工艺技术装置中。板式换热器用于工艺液体的加热、蒸发和冷却。如果换热器中的产品容易结垢。则必须对换热器进行周期性的清洗。电化学抛光减少了结垢层的形成。同时也提高了不锈钢板的寿命。     

铝硅合金压铸件电解抛光新工艺

简述了电解抛光原理，提出了一种铝硅合金压铸件的电解抛光新工艺。     

高纯气体处理设备的电解抛光

前言需用超高纯气体的半导体工业是现在发展最快的工业之一。为了满足需要,特气生产者不断开发了先进的分离、提纯和配气技术,可得到各种有保证的纯度等级的特气,其中包括7级(99.99999％)的特气。这是工业中应用的最纯气体。为了防止这些超纯气体被二次污染,气体钢瓶及有关气体处理设备应尽可能达到清洁和化学稳定。本文说明电解抛光是达到这一目的的最好方法。     

现场金相检测中电解抛光技术的应用探索

为了改善工件表面的抛光效果,解决传统机械抛光对抛光工件几何形状的限制,提高实际工程中对工件的抛光效率,本文介绍了一种全新的抛光工艺——电解抛光。电解抛光工艺与工件的材质、电流大小以及电解液的温度等参数密切相关,合理的控制这些工艺参数才能达到理想的抛光效果。本文主要探究电流密度、抛光温度以及阴阳极间的距离等因素对抛光效果的影响。     

数控机床电解抛光运动仿真在教学中的应用

文章对数控机械电解抛光进行了运动仿真，并对运动协调性，抛磨轨迹合理性进行了检验。     

Sinterable La0.8Sr0.2CrO3 and La0.7Ca0.3CrO3 powders by sucrose combustion synthesis

Air atmosphere sinterable La_0.8Sr_0.2CrO₃ [LSC] and La_0.7Ca_0.3CrO₃ [LCC] powders have been prepared by sucrose combustion synthesis. Aqueous solution containing stoichiometric quantities of the metal nitrates and sucrose (3 moles/mole of the metal ion) at pH ∼1 was concentrated by heating on a hot plate into a viscous resin which on drying at 120°C produced a foam with interconnected pore structure. This foam ignited with a matchstick in a combustion set up fabricated in the laboratory produced ashes consisting of loose aggregates of LSC and LCC particles. The loose aggregate of LSC and LCC were powdered by planetary ball milling to submicron size particles with D₅₀ value 0.19 and 0.60 μm, respectively. The surface area of the LSC and LCC powders was 23 and 19 m²/g, respectively. Pellets prepared by cold compaction and sintering of LSC and LCC powders in air atmosphere showed density 96.8 and 98.8% of theoretical value respectively. Sintered LCC sample showed finer grains compared to the LSC sample under identical processing conditions.     

Emulsion processing of SOFC materials Ca0.3La0.7CrO3, Sr0.16La0.84CrO3, and Sr0.2La0.8MnO3

A novel preparation route to the perovskite materials Ca_0.3La_0.7CrO₃, Sr_0.16La_0.84CrO₃, and Sr_0.2La_0.8MnO₃ is described. The method produces the phase pure perovskite phases after calcination at 700°C for 2 hours. The powders produced are unagglomerated, and consist of hollow spherical particles 0.15 m in diameter. EDX has shown that the careful control of reaction conditions is vital to control the phase composition, and that small changes in stoichiometry result in the production of unsinterable powder.     

铝合金电化学抛光工艺

采用综合评价方法研究了铝合金电化学抛光添加剂，结果发现，在碱性溶液中加入PEG作光亮剂可明显改善抛光效果，加入酒石酸钠等作稳定剂可延长溶液使用周期，并在此基础上优化了抛光工艺条件。试验表明，采用此工艺来抛光铝材获得的综合效果优于酸性电化学抛光和传统碱性电化学抛光，是一项有应用前景的新工艺。     

电化学抛光技术及应用

1　前　言近年来 ,不锈钢材料得到了广泛的使用 ,其表面抛光技术也不断更新 ,表面抛光的作用有 :(1)提高金属表面的光洁度 ,减少表面不均匀性 ,提高材料耐蚀性能。如不锈钢的反应釜衬里 ,经抛光后大大提高其耐蚀性 ,同时也减少物料在表面的积聚 ,提高了产品的质量。(2 )作为电镀、化学镀或涂层的基底 ,底面愈光亮 ,得到的镀、涂层也愈光亮 ,其耐蚀性愈高 ,装饰性更好。(3)作为日常生活用具的表面或建筑材料的表面 ,经抛光后其表面光亮度愈高 ,装饰性愈好。通常有机械抛光、化学抛光和电化学抛光 ,现就电化学抛光及应用作一简介 ,其抛光方法[…     

Reaction characteristics of La0.84Sr0.16CrO3 formation

We studied the kinetics of La_0.84Sr_0.16CrO₃ formation from a precursor consisting of La and Sr chromium oxides and carbonates made by spray roasting. Pure LaCrO₃ becomes cubic at temperatures exceeding 1900 °C. Strontium doping lowers the transition temperature, for example, that of La_0.84Sr_0.16CrO₃ is 1700 °C. This transition is gradual and occurs over a 700 °C range upon heating and cooling. Low temperature (LT) air calcination (450 °C) of the precursor yields a mixture of LaCrO₄ and SrCrO₄, which following 20 h of heating at 1440 °C produces a homogeneous powder. Secondary electron images of this precursor reveal dense spheres with 95% of the theoretical density of La_0.84Sr_0.16CrO₃. High temperature (HT) calcination (800 °C) yields a mixture of LaCrO₃ and SrCrO₄, which following 40 h of heating at 1500 °C produces a uniform product. The LT and HT calcination causes oxygen loss.     

Electropolishing of silicon using hydrazine

A new electropolishing technique has been investigated for polishing silicon using aqueous hydrazine. p-Type silicon samples are electropolished using this technique and the optimum experimental condition required to achieve this is suggested. This revised version was published online in July 2006 with corrections to the Cover Date.     

Electropolishing of NiTi for Improving Biocompatibility

A modified electrolyte （CH3COOH-HClO4-A-B） for electropolishing （EP） of NiTi was presented for improving the corrosion resistance and biocompatibility of the alloy. Using the proposed parameters, a homogeneous and uniform surface was obtained. Atomic force microscopy （AFM） revealed that the surface roughness （Ra） for EP sample （23.21 nm） was close to mechanical polishing （MP） sample （19.36 nm）. Analysis by X-ray photoelectron spectroscopy （XPS） showed that Ti/Ni ratio increased from 3.1 for MP sample to 27.6 for EP sample. Measurements using potentiodynamic polarization in Hanks＇ solution showed that no pitting occurred for EP sample even though the applied potential increased up to 1500 mV （vs SCE）, while the MP sample was broken down at 650 mV. The present study indicates that electropolishing NiTi with this modified electrolyte contributes to the improved biocompatibility of NiTi.     

电抛光在摩托车活塞环上的应用

利用电化学方法进行不锈钢衬环的表面亮化处理，去除衬环表面的毛刺，改善其外观质量，增加环体与缸体的贴合性。