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When the molar fraction of SnO2 is 83%, the main component of the coating isO2 solid solution with rutile structure. When the molar fraction of SnO2 is 44%, the main components of coating are theO2 solid solution with rutile structure andO2 solid solution with fluorite structure. When the molar fraction of SnO2 is 17%, the main component of the coating isO2 solid solution with fluorite structure. Annealed at higher temperature than 450 ℃, CeO2 is found in the coating containing 83%Sn, and there is not SnO2 in the coating containing 83%Ce, which suggests that fluoriteO2 has higher thermal stability than rutileO2. When the molar fraction of SnO2 increases, the dispensability of the coatings is improved greatly.

结果表明:通过控制制备条件可获得具有纳米结构的钛阳极涂层;当Sn的摩尔分数为83%时,涂层主要为金红石相的O2固溶体;当Sn的摩尔分数为44%时,涂层中金红石相O2固溶体和萤石结构的O2固溶体共存;当Sn的摩尔分数为17%时,涂层由萤石结构的O2固溶体组成;高于450 ℃退火时,含83%Sn的涂层中出现CeO2相,而在含83%Ce的涂层中没有出现SnO2相,表明在相同的溶质浓度下,萤石结构的O2固溶体比锡基金红石相O2固溶体具有更好的热稳定性;而涂层中的SnO2具有明显改善涂层分散性的作用。

Cyclic voltammetry indicated that there were Cr→Cr, Cr →Cr oxidation reaction on anode, while there were Cr→Cr, Cr→Cr, Cr →Cr deoxidization reaction on cathode. The graphite electrodes treated by acid and heating could enhance the reversibility and kinetic of the electrode reaction. The nature graphite electrodes had been eroded during charge/discharge process, while the graphite electrodes by activation could avoide corroding by hexad chromium ion. The reversibility and kinetic of the electrode reaction of chromium ion on activation electrode had been increased, so which indicated that graphite surface augment oxygenous function corps which could increase electrode hydrophile capability.

循环伏安实验表明:铬液流电池的电极反应非常复杂,在阳极存在Cr→Cr,Cr→Cr的氧化反应,在阴极存在Cr→Cr,Cr→Cr,Cr→Cr的还原反应;热处理的石墨电极和重铬酸钾处理的石墨电极能提高电极反应的活性和可逆性;在充放电实验中未处理的石墨电极发生严重腐蚀;分别用这两种方法处理过的石墨电极具有防止六价铬侵蚀的功能;铬离子在活化处理过的石墨电极上的反应活性和可逆性增加,可以认为:重铬酸钾溶液活化处理和加热处理后的石墨表面的含氧官能团增加,电极亲水性增强。

The results show that a MgSnO3·H2O conversion film is formed by treatment in the stannate solution at 90℃, and the immersion test and potentiodynamic polarization show that the corrosion resistance of the AZ91D alloy is improved to some extent.

结果表明:锡酸盐转化处理后合金表面形成了以MgSnO3·H2O为主要成分的转化膜,可对合金起到一定的防护作用;转化膜由细小的球形颗粒密积而成,颗粒之间存在间隙,它可以为化学镀镍的前处理过程提供良好的吸附条件;转化膜上的化学镀镍层组织致密、无缺陷, MgSnO3·H2O转化膜在镀镍层与基体之间起到过渡作用,镀层的磷含量达到9%,与基体结合良好;在3.5% NaCl (pH=7)溶液中的动电位极化测试表明,镀镍以后的合金在阳极极化过程中发生了明显的钝化,耐腐蚀性能进一步提高,对基体起到了较好的防护作用。

On the basis of previously research, this paper re-probe into the mechanism of electro-chemist mechanical manufacturing process, making the rational technological parameter, and developing the manufacturing equipment. Through a lot of technology tests, get a lot of labratory data, accordingly, researched the surface feature of the electro-chemist manufacturing process, and deeply discussed its influence on the work piece feature. The last result is that: the electro-chemist mechanical manufacturing process can reduce the low-frequency component significantly, but on high-frequency component, it has little influence, having obviously positive pole flat effect. After manufacture, the tip parts on the surface of the work piece is cut off, there is micro "high land" shape, the parameter for surface roughness is reduced a lot, the surface outline of the work piece is negative, the bearing length rate is cliffy. Also the surface quality of the work piece is improved. This can help to avoid changing the shape, improve the feature of rub, gear and reduce the time to suit. This would also ensure the precision and result in a longer work piece life.

在以前研究的基础上,本论文重新探讨了电化学机械复合光整加工工艺的机理,确定了较合理的工艺参数,对电化学机械复合光整加工设备进行了改进,通过工艺实验广泛地搜集了大量实验数据,依据实验数据,多角度地研究了电化学机械复合光整加工的表面形貌特点,并且从理论上深入讨论了电化学机械复合光整加工表面形貌对工件工作性能的影响,最后得出的结论为:电化学机械复合光整加工对工件原始表面的低频成分有较大程度的降低,而对高频成分影响较小,有明显的阳极整平作用,被加工工件表面的尖峰状凸起被去除,工件表面呈现出微观&高原型&,表面轮廓不平度高度特性参数大幅度降低,工件表面轮廓分布集中,且呈负偏态,轮廓偏斜度为负值,轮廓支承长度率曲线陡峭,工件的表面质量得到综合改善,这对提高零件的抗接触变形能力、改善摩擦、磨损性能、降低工件的磨合时间、提高工件的精度保持性、延长工件的寿命均有利。

Zn-La alloys increase the overpotential ofhydrogen evolution, Tafel slope 〓 and polarization, decrease the corrosion current density, inhibitthe corrosion of zinc electrode in alkaline solution, decrease anode Tafel slope 〓, promotedischarge reaction of zinc electrode, have higher passivation current density, inhibit thepassivation of zinc electrode, avoid the oversaturation of zincate in electrolyte, greatly increase〓 diffusion coefficient, decrease Tafel slope 〓, polarization and the overpotential of deposition,inhibit the dendrites formation and improve the electrodepostion of Zn.

实验结果表明,Zn-La合金电极显著改善了锌电极的各项电化学性能:提高析氢过电位、析氢过程Tafel斜率〓和极化,减小腐蚀电流密度,抑制锌电极在碱液中的腐蚀;降低阳极Tafel斜率〓,促进了锌电极的放电反应;具有较高的维钝电流密度,抑制锌电极的钝化;有效避免了溶液中锌酸盐的过饱和现象:使〓的扩散系数明显增大:降低Zn沉积过程的Tafel斜率〓、极化和沉积过电位,明显抑制锌枝晶的生长,改善了锌的电沉积性能。

Machining process and general information:· General Information – Tooling o Plan to have own engineering group as company expands o Hwasung is subcontracted to do engineering currently o Uses same cutting tools as in Korea facility – all diamond o Regrind tools if can o Hwasung has capability to surface grind, repair dies, and make molds with wire EDM process · General Information – Machining o Boundary samples are used: okay, borderline, not good o Quality room has separate windows for incoming and outgoing parts o New equipment will be coming in from FM LaGrange plant o Each operation has pictures and job instructions for what to check and which gage to use to check part o Parts are manually loaded into machine or pallet, depending on line o Auditor checks parts for verification: after operator checks part, puts in bin, auditor checks part and reloads back on line o Have tool management system o A pokeyoke check is used for orientation prior to loading o Machines are guarded o Mostly have CNC machines o Manual chip collection systems o If automated, have robots with grippers to load/unload parts from pallets o After final inspection, operator visually inspects and loads onto plastic dunnage with the crown up and loads into the washer o Repairs: filing down of burrs or sharp edges after anodizing the crown o Have 2 Excello machines for special machining of the pin bores o 2.7% scrap for gasoline pistons o Cycle time is 18 seconds for gasoline piston o Process – Wash o Spray system o 4 stations: heated wash, wash with degreaser, 2 rinse stations o Uses RO water o Operator blow dries piston and puts on dunnage with crown up o Parts wheeled into coating room o Needs major improvements here o Chemical analysis done for bath in chemical room o Comments/Observations: o Relatively small piston facility, but plans for additional space.

加工工艺和一般信息:·–的一般信息工具 o 有自己的工程集团,随着公司的扩展计划 o Hwasung 是分包做当前工程 o 用途相同的扦插工具,如在韩国设施–所有钻石 o 回收料工具如果可以 o Hwasung 已表面研磨,修复模具,和模具丝电火花加工能力过程·一般信息–加工 o 界限示例用于:好交界,不好 o 质量房间有单独的窗口传入和传出的部件 o 新设备会在来从调频拉格朗日植物 o Each 操作具有图片和工作说明的什么复选,计为使用检查部分 o 部件是手动加载到机器或托盘,取决于行 o 审计检查验证零件:置于 bin,运算符检查部分后,核数师检查部分并重新加载回行上 o 有工具管理系统 o 为 pokeyoke 复选用于在加载之前的定位 o 机被保护 o Mostly 有数控机床 o 手动芯片收集系统 o 自动,如果有与要加载/卸载部分从托盘 grippers 机器人 o 后最终检验,运算符将直观地检查并加载到与塑料衬垫冠了与到洗衣机负荷 o 修复:提交下毛刺或锋利的阳极氧化冠后 o 有 2 Excello 机特别加工的销孔 o 2.7%废料的汽油活塞 o 周期时间是为汽油活塞式 18 秒 o 过程–洗 o 喷射系统 o 4 站:加热洗、与脱脂剂洗、 2 冲洗站 o 使用反渗透水 o 运算符吹干活塞式并将了放冠衬垫 o 部件轮式进涂层房间 o 需要重大改善在这里 o 为在化学的房间里浴做的化学分析 o 注释/结论: o 相对小活塞式设施,但额外的空间的计划。

A direct method to prepare nanometre catalyst of positive electrode for methyl alcohol fuel battery is to add strong oxidant to a mixed solution of manganese nitrate and some other metal nitrate, to coat them on the graphite electrode to have catalyst precursor produced, then to prepare the non-platinum nanometre catalyst of metal ion-doped manganese dioxide with carbon as a carrier by thermolytic reaction of the in-situ precursor. The prepared catalyst has the advantages of high electrical catalytic activity of methyl alcohol, high performance to protect against CO poison and low price, and it can lower the battery manufacturing cost effectively as well as can raise the entire electrical property of the battery so that the price performance and the market competitive edge of the battery are enchnaced effectively.

一种直接甲醇燃料电池阳极纳米催化剂的制备方法是在硝酸锰和其它金属硝酸盐的混合溶液中加入强氧化剂,涂抹于石墨电极上制成催化剂先驱体,通过先驱体在原位的热分解反应来制备以碳为载体的金属离子掺杂二氧化锰非铂纳米催化剂;制得的催化剂具有高的甲醇电催化活性、高的抗CO毒化性能以及低廉的价格等优点,可以有效地降低电池的制造成本,提高电池的整体电性能,从而有效地提高直接甲醇燃料电池的性能价格比及市场竞争能力。

The WEDM process makes use of electrical energy generating a channel of plasma between the cathode and anode [5], and turns it into thermal energy [6] at a temperature in the range of 8000–12,000 vC [7] or as high as 20,000 vC [8] initialising a substantial amount of heating and melting of material on the surface of each pole.

WEDM 程序利用电的能源产生一个血浆的频道在阴极和阳极之间 [5],而且将它变成热的能源 [6] 在 8000 – 12,000 vC 的范围温度 [7] 或高达 20,000 vC[8] initialising 实质上量的暖气和熔化的在每个杆的表面上的材料。

Based on research results on anodic and cathodic process, mixed-potential models of gold dissolution in the presence of heavy metal ions have been constructed. A Viewpoint is proposed that only being associated with cathodic enhancement by using assistant such as hydrogen peroxide do heavy metal ions enhance gold dissolution in cyanide solutions to the greatest extend.

在详细研究了重金属离子存在条件下金的阳极溶解和氧的阴极还原行为的基础上,构造了重金属强化氰化溶金的混合电位模型,提出了只有在辅以阴极强化的条件下,重金属离子才能最大限度强化金的氰化溶解的观点。

Results: 1Lightly selective solution appeared on the surface of anodizing samples. The sample's metal surface expanded and the thickness of oxide film is 1.72 times of the control samples. 2 The samples of degassing-preoxidation group formed very thick oxide film on surface and it was 23.32 times of the control samples, the relative content of O element in thick oxide film was higher than the other 2 groups.

阳极钝化处理的试片表面发生了轻度的选择性溶解,增加了金属的表面积,所形成的氧化膜厚度是空白对照组的1.72倍。2)除气加预氧化组则形成较厚的氧化膜,为空白对照组的23.32倍,而且氧化膜内氧原子的相对含量远远高于其他实验组。

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