铬

The valence electron structure of medium chrome cast iron matrix is set up and the effect of Si on medium-temperature phase transformation is analyzed by using empirical electron theory of solids and molecules.

此文建立了290Cr8Si2中铬铸铁基体的价电子结构，运用固体与分子经验电子理论分析了中铬铸铁中Si对铸铁中温相变的影响，分析和实验结果表明，290Cr8Si2中铬铸铁基体含C、Cr、Si的-γFe晶胞中，C原子与Si原子的结合力强于C原子与Cr原子的结合力，中铬铸铁中较高的含Si量降低了铸铁基体的含Cr量，进而降低了中铬铸铁的淬透性。

It is very important to study the composition of chrome tanning liquors for elucidating the reaction mechanism of collagen and chrome coordination compounds and directing practical chrome tanning process.

研究铬鞣液的组成及各种铬配合物在铬鞣过程所起的作用，对于阐明铬鞣机理和实际的铬鞣操作过程有重要的指导意义。

In conclusion, not only the methods and relative situation of extracting Cr from chrome slag but also the feasibility of producing yellow chrome by using chrome slag"s leachate were studied in this dissertation. All these study will provide necessary theoretical basis for the industrialization of producing yellow chrome from the chrome slag"s leachate.

本论文研究的创新之处在于：本研究以从铬渣中提取六价铬作为立足点，消除了解毒后的铬遇氧化条件毒性恢复的可能，利用回收的六价铬制取铬黄颜料的研究初步证明，该法不仅切实可行，而且成本低廉、效益好。

Influence of the concentration of Cr in the leachate and quantity of Pb(CH3COO)2 of Pb(NO3)2 on the reaction of synthesizing yellow chrome was also studied. Finally, according to the criterion and standard method in GB3184-82, some yellow chrome synthesized in the experiments was sampled and the concentration of PbCrO4 in these samples was determined. The following conclusion can be drawn from these experiments.

根据中华人民共和国国家标准GB3184-82中的规定铅铬黄颜料的技术质量指标和检测方法，测定了铬黄样品中铬酸铅含量的厂迄回【、矾士牢位论父泅仰yW盯皿'S川mS达标情况，结论如下：门）反应中重铬酸盐的浓度并不需要达到前人所提出的150～2509·L'的范围，在一定条件下低于此浓度时对铬黄生成反应并无不利影响。

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。

Typical application: Co-WC powder, chrome oxide powder, Lead sesquioxide powder, Chromium carbide powder, zirconium oxide powder, Ni Base Alloy-Chromium Carbide,etc.

典型应用：钴碳化钨粉、氧化铬粉、三氧化二铅粉、碳化铬粉、氧化锆粉、镍铬碳化铬粉、钴铬铌钇粉等。

The experimental results indicate that the treatment process of copper alloy using benzotriazole can improve the corrosion resistance greatly.

目前常采用的是铬酐及重铬酸盐的钝化处理工艺，虽然效果比较好，但由于铬化处理过程中的铬离子对人体和环境的污染严重，因此研究针对不同使用环境的、良好的无铬钝化工艺具有很大的现实意义。

While high quality deposition from trivalent chromium electrolyte could only be sustained for short periods and thin deposits obtained of decorative value only, it is difficult to substitute heaxvalent chromium plating in engineering electrodeposits by trivalent chromium plating at all.

因此，本文在电沉积出镍-铁合金纳米晶的基础上，采用脉冲电沉积的方法研究了在三价铬体系中获得纳米晶铬和铬-镍-铁合金纳米晶厚镀层的工艺及其基础理论，以期解决三价铬镀液完全代替六价铬电镀的难题。

Imagnesite Chrome Brick:Diect-bonded Magnesite Chrome Brick ,Electro-fused Re-bonded Magnesite Chrome Brick.

镁铬砖、直接结合镁铬砖、电熔再结合镁铬砖。镁铬砖：是以烧结镁砂和氧化铬为原料经同压成型、高温烧成制得。

I put into production since the Secretary has been actively introduce advanced production equipment innovation and technology, in order to meet customer orders in Europe and the United States has launched a new demand for environmental protection trivalent chromium process, for the plating of the following: trivalent chromium, chromium -, A half-chrome, pearl chromium, Heiqiang color, green bronze, gold, champagne.

我司自投入生产以来，积极创新引进先进生产设备及工艺，为满足欧美客户订单的需求现已推出新型环保三价铬工艺，镀种为以下几种：三价铬，光铬，半光铬，珍珠铬，黑枪色，青古铜，金色，香槟色等。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。