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chromium electroplating     
相关语句
  镀铬
     The results show that the fatigue limit of substrate strengthened by HVOF WC/Co is 753.3, substrate strengthened by Chromium electroplating 600.0 and bare substrate 726.7MPa.
     结果表明,HVOFWC/Co,电镀铬涂层和300M基体的疲劳极限强度分别为753.3MPa,600.0MPa和726.7MPa。
短句来源
     The Chromium electroplating greatly reduces the fatigue life by 70~95%.
     电镀铬大幅度降低基体的疲劳性能,疲劳寿命降低幅度达70%~95%。
短句来源
     Design and Study on Precision Measure-control System for Chromium Electroplating Thickness of Cylinder Liner Abrasion
     汽缸套电镀铬厚度精密测控系统设计
短句来源
     Development and Prospect for Chromium Electroplating Additives
     电镀铬添加剂的发展与展望
短句来源
     STUDY OF EDTA TRIVALENT CHROMIUM ELECTROPLATING
     用EDTA为络合剂的三价铬镀铬工艺研究
短句来源
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  电镀铬
     The results show that the fatigue limit of substrate strengthened by HVOF WC/Co is 753.3, substrate strengthened by Chromium electroplating 600.0 and bare substrate 726.7MPa.
     结果表明,HVOFWC/Co,电镀铬涂层和300M基体的疲劳极限强度分别为753.3MPa,600.0MPa和726.7MPa。
短句来源
     The Chromium electroplating greatly reduces the fatigue life by 70~95%.
     电镀铬大幅度降低基体的疲劳性能,疲劳寿命降低幅度达70%~95%。
短句来源
     Design and Study on Precision Measure-control System for Chromium Electroplating Thickness of Cylinder Liner Abrasion
     汽缸套电镀铬厚度精密测控系统设计
短句来源
     Development and Prospect for Chromium Electroplating Additives
     电镀铬添加剂的发展与展望
短句来源
     The effects of both WC/Co spray coating and chromium electroplating on the fatigue performance of 300M low alloy steel were investigated at the stress level close to fatigue limit.
     研究了在近疲劳强度栽荷下超音速火焰喷涂WC/Co涂层和电镀铬层对300M低合金钢疲劳性能的影响。
短句来源
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  铬电镀
     The hazards of hexavalent chromium electroplating, and the benefits of trivalent chromium electroplating were analyzed.
     分析了六价铬电镀的危害及三价铬电镀的优点,以及三价铬电镀取代六价铬电镀带来的效益。
短句来源
     Trivalent chromium electroplating
     三价铬电镀
短句来源
     Study on Characteristics of Brightener in Nickel and Chromium Electroplating at Different Developing Stases
     不同发展阶段的镍、铬电镀光亮剂的特性
短句来源
     The various hard chromium electroplating replacement technics in Japan were introduced respectively——including process criterion of trivalent chromium electroplating, bath analysis methods and existing problems in trivalent chromium electroplating, process criterion of va- rious wear resistant alloy electroplating, deposit hardness before and after heat treatment and process formulae of Ni-W, Fe-W alloy electroplating, process criterion of composite electroplating and coating performance of high velocity oxygen fuel thermal spray, structure of spray gun,etc.
     分别介绍了日本的各种硬铬电镀取代技术——包括三价铬镀铬工艺规范及其镀液分析方法和存在的问题,各种耐磨合金电镀工艺规范、热处理前后镀层硬度以及Ni-W,Fe-W合金电镀工艺配方,复合电镀工艺规范和火焰喷涂涂层性能、喷枪结构等。
短句来源
     Trivalent chromium electroplating not only can reduce pollution obviously and save pollution treatment cost, but also can improve the quality of electroplating products.
     三价铬电镀不仅可明显减少电镀对环境的污染,节省大量的污染治理费用,而且还可提高电镀产品的质量。
短句来源
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  铬镀铬
     STUDY OF EDTA TRIVALENT CHROMIUM ELECTROPLATING
     用EDTA为络合剂的三价铬镀铬工艺研究
短句来源
     The various hard chromium electroplating replacement technics in Japan were introduced respectively——including process criterion of trivalent chromium electroplating, bath analysis methods and existing problems in trivalent chromium electroplating, process criterion of va- rious wear resistant alloy electroplating, deposit hardness before and after heat treatment and process formulae of Ni-W, Fe-W alloy electroplating, process criterion of composite electroplating and coating performance of high velocity oxygen fuel thermal spray, structure of spray gun,etc.
     分别介绍了日本的各种硬铬电镀取代技术——包括三价铬镀铬工艺规范及其镀液分析方法和存在的问题,各种耐磨合金电镀工艺规范、热处理前后镀层硬度以及Ni-W,Fe-W合金电镀工艺配方,复合电镀工艺规范和火焰喷涂涂层性能、喷枪结构等。
短句来源
     The major advantages and disadvantages of trivalent chromium electroplating were introduced.
     介绍了三价铬镀铬的主要优点与缺点。
短句来源
     The research progress on trivalent chromium electroplating was reviewed,including bath stability,trivalent chromium electroplating for thicker coating and several other types of trivalent chromium electroplating,non-crystal chromium electroplating,electrode material,etc.
     从几个方面综述了三价铬镀铬的研究进展,包括镀液稳定性、三价铬电镀厚铬及其它几种类型的三价铬镀铬、电镀非晶态铬、电极材料等。
短句来源
     Trivalent chromium electroplating technology was comprehensively investigated to substitute the traditional Cr (Ⅵ) plating with serious pollution.
     为取代污染严重的传统六价铬镀铬工艺 ,针对三价铬电镀开展了广泛研究。
短句来源
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      chromium electroplating
    With this current shape, the mean rate of the chromium electroplating process remained lower than 10 μm h-1.
          
    Controlled nucleation and growth in chromium electroplating from molten LiCl-KCl
          
    Determinations of urinary chromium on 26 workers from 6 chromium electroplating workshops are presented and discussed in relation with results of airborne chromium.
          
    However, because of the presence of organic constituents such as formate, oxalate, and triethylene glycol in effluents, trivalent chromium electroplating operations may face additional regulatory requirements for removal of total organic carbon.
          
    Thus, transition from hexavalent to trivalent chromium electroplating processes may be justified.
          
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    1-Chloro-2-iodotetrafluoroethane was readily telomerized with tetrafluoroethylene giving low molecular weight telomers, Cl(CF_2CF_2)_nI(n=2~5), which were readily separated by fractional distillation. Through the metal-halogen exchange reaction between those telomers and a Grignard reagent, relatively stable chlorofluoroalkylmagnesium halide has been synthesized at low temperature. From the reactions of these chlorofluoroalkylmagnesium halides, ω-chloroperfluoroalkene-1, Cl(CF_2CF_2)_nCF_2=CF_2(n=1,2,3), ω-chloroperfluoroalkyl...

    1-Chloro-2-iodotetrafluoroethane was readily telomerized with tetrafluoroethylene giving low molecular weight telomers, Cl(CF_2CF_2)_nI(n=2~5), which were readily separated by fractional distillation. Through the metal-halogen exchange reaction between those telomers and a Grignard reagent, relatively stable chlorofluoroalkylmagnesium halide has been synthesized at low temperature. From the reactions of these chlorofluoroalkylmagnesium halides, ω-chloroperfluoroalkene-1, Cl(CF_2CF_2)_nCF_2=CF_2(n=1,2,3), ω-chloroperfluoroalkyl carbinols, Cl(CF_2CF_2)_n CR'R"OH(R'=CH_3, R"=H; R'=R"=CH_3; R'=R"=CF_3; n=2,3) and ω-chlorofluoroalkanesulfonyl chloride have been prepared. Methylmagnesium iodide reacted with methyl ω-chlorofluoroalkanoate yielding carbinol Cl(CF_2CF_2)_nCF_2C(CH_3)_2OH(n=1,2). Potassium chloroperfluoroalkanesulfonates are good surfactants which has been applied to the chromium electroplating as a chromic acid-mist suppressant.

    1-氯-2-碘四氟乙烷易与四氟乙烯进行热调聚反应,形成低分子量调聚物,Cl(CF_2CF_2)_nI(n=2~5),可以蒸馏分离.在低温下调聚物与普通格氏试剂反应得氯氟烷基卤化镁,再由它获得ω-氯代全氟烯烃-1Cl(CF_2CF_2)_nCF=CF_2(n=1,2,3)、ω-氯代全氟烷基醇Cl(CF_2CF_2)_nCR′R″OH(R′=CH_3,R″=H;R′=R″=CH_3;R′=R″=CF_3;n=2,3)及ω-氯代全氟烷基磺酰氯Cl(CF_2CF_2)_nSO_2Cl(n=2,3,4).通过ω-氯代全氟羧酸甲酯与甲基碘化镁的反应也得到ω-氯代全氟烷基醇Cl(CF_2CF_2).CF_2C(CH_3)_2OH(n=1,2).ω-氯代全氟烷基磺酸钾是稳定性很好的表面活性剂,可用作电镀镀铬中的铬雾抑制剂.

    A bath system of aminocarboxylic acids for chromium electroplating from trivalent state was investigated.A new technology for obtaining satisfactory Cr coatings from bath comprising trivalent chromium salt was proposed.

    比较研究了以 EDTA,DCTA,氨三乙酸,亚氨基二乙酸和天门冬氨酸为络合剂的氨基羧酸型三价镀铬新体系的性能。讨论了还原剂种类、温度、pH、阳极材料等的影响。提出了稳定性较好的三价镀铬新工艺,可获得满意的镀层。与六价铬镀铬相比,三价铬镀铬具有一系列的优点,如:毒性较低,废液处理简便,电化学当量较大,深镀能力与均镀能力好等。文献已报导多种三价铬镀铬体系,如:次磷酸盐、乙氨酸盐、甲酸盐、草酸盐、天门冬氨酸等,此外尚有建议添加尿素、硫氰化物。加藤进等曾研究了多种一、二、三羟基羧酸(或盐)作络合剂的三价铬镀铬溶液的使用性能。本文报告了对多种氨基羧酸三价铬镀铬体系进行比较试验的研究结果,各体系均以鞣革用硫酸铬作为镀液铬源。

    The electroplating of chromium on steel substrate in the LiCl-KCl-CrCl_2 molten salt system at 550℃ has been studied. The chromium, present in the electrolyte as chromium (Ⅱ) ion was produced by the reactions of HCl chlorization with metalic chromium powder in the molten LiCl-KCl eutectic. These reaction are based on the calculation of thermodynamics. In this study, the potentiastatic periodic reversal step technique has been employed in the chromium electroplating, and high coverage rate, smooth and dense...

    The electroplating of chromium on steel substrate in the LiCl-KCl-CrCl_2 molten salt system at 550℃ has been studied. The chromium, present in the electrolyte as chromium (Ⅱ) ion was produced by the reactions of HCl chlorization with metalic chromium powder in the molten LiCl-KCl eutectic. These reaction are based on the calculation of thermodynamics. In this study, the potentiastatic periodic reversal step technique has been employed in the chromium electroplating, and high coverage rate, smooth and dense of chromium deposits has been obtained.

    本文研究了在550℃的LiCl-KCl-CrCl_2熔盐系中对钢进行电镀铬的行为。通过热力学计算,证明采用氯化氢气体在KCl-LiCl低共熔混合盐的熔体中,可直接氯化金属铬粉制得Cr(Ⅱ)氯化物的熔盐溶液。采用控制电位法电沉积——电解循环脉冲工艺获得覆盖率好、致密的且结合力强的铬镀层。

     
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