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通过偏转法、划痕仪法和中性盐雾试验等方法,测试分析了国内外市场上六种主要品牌硫酸镍的中磷化学镀镍层的内应力、结合力及耐蚀性和高磷化学镀镍层的耐蚀性、结合力及镀液沉积速率等性能。测试结果显示,金柯品牌硫酸镍所获取的中磷化学镍层内应力、结合力和耐蚀性明显优于其它品牌,高磷化学镀镍层耐蚀性、结合力及镀液的沉积速率也优于其它品牌,该品牌硫酸镍更适合于磁盘高磷化学镀镍。 相似文献
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施加磁场对氯化亚铁镀铁溶液电化学性能的影响 总被引:1,自引:0,他引:1
为了从理论上解释外加磁场使镀铁溶液在曲轴轴颈圆角处镀厚能力增加的原因,研究了施加磁场对氯化亚铁镀液电化学性能的影响。试验结果表明,不仅能提高镀液的电导率及低电流密度下的电流效率,还能改善镀液的分散能力和整平性能。 相似文献
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电镀液的分散能力和覆盖能力(Ⅰ) 总被引:1,自引:0,他引:1
介绍了电镀液分散能力和覆盖能力的基本概念及其影响因素;分析了分散能力和覆盖能力之间的区别和联系。简述了测定方法以及改善镀液分散能力和覆盖能力的途径。此外还对整平能力的概念、分类以及测量方法做了简要的介绍。 相似文献
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《电镀与精饰》2020,(6)
针对高纯镍阳极连续电解后,杂质元素(Fe、Zn、Cu、Cr)累积影响镀液与镀层质量的问题,采用3种高纯镍阳极材料连续溶解30 d,以模拟工业电镀进程的方法,研究了杂质元素对镀液与镀层质量的影响。通过赫尔槽实验、条形阴极法、中性盐雾实验等方法测试了8 d、30 d时镀液的电流效率、分散能力等性能,分析了8 d、30 d时镀液获取的镀层的外观、内应力和耐蚀性。结果表明,采用高纯度可溶性镍阳极,连续电解8 d,镀液与镀层性能未见明显改变;但电解至30 d时,镀层麻点增多,内应力增大、耐蚀性下降。国内外品牌对比发现,使用国内品牌1电解30 d时,镀液的铬杂质含量是最少的,为0.001 mg·L-1,而国外品牌3电解30 d时,镀液的铁杂质含量是最少的,为0.090 mg·L-1。镀层的微观形貌表明,对30 d的镀液进行"电解和循环过滤"后,能够有效提高镀液性能和镀层的质量。 相似文献
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A. Subramanian K.N. Srinivasan S. John T. Vasudevan 《Journal of Applied Electrochemistry》2001,31(1):35-40
An electrochemical approach was made to recover the nickel from plating wastes in the form of activated nickel by incorporating additives such as thiourea, sodium metabisulfite and sodium thiosulfate in the electrolyte. The anodic behaviour of the nickel produced was studied for its suitability in a Watts nickel and chloride free sulfate baths. It was found that the activated nickel produced with sodium metabisulfite and thiourea additives performs similarly to commercially available activated nickel anodes. 相似文献
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分光光度法测定光亮镍及珍珠镍镀液中的镍含量 总被引:6,自引:0,他引:6
光亮镍和珍珠镍镀中镍的测定定通常采用EDTM滴定法,该法选择性低,易造成环境污染,本文采用分光光度法进行分析,探讨了测量波长,硫酸浓度及干扰元素等的影响,该法在镍含量为0-200mg范围内遵守比耳定律,测量结果准确,能满足实际生产的要求。 相似文献
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氨基磺酸镍制备的研究 总被引:1,自引:0,他引:1
以镍粉和氨基磺酸为原料 ,并加入H2 O2 ,制备了氨基磺酸镍 ,H2 O2 加入镍粉与水的混合物中的速度不能太快 ,氨基磺酸分批加入。还以电铸后形成的镍片为原料制备了氨基磺酸镍 :先将这些金属镍片制成硝酸镍 ,然后由硝酸镍制成氢氧化镍或碳酸镍 ,最后将其与氨基磺酸反应生成氨基磺酸镍。在合成氨基磺酸时 ,发烟硫酸分两批加入 ,第一批发烟硫酸加入后反应温度为 30℃ ,第二批发烟硫酸加入后 ,反应温度分两阶段提升 ,第一阶段反应温度为 5 5~ 6 0℃ ,第二阶段为 70~ 80℃ ,产品晶型好 ,易纯化 ,产率较高 相似文献
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提出用氟化物、酒石酸和草酸溶液掩蔽Fe3+、Al3+、Ca2+、Mg2+、Zr4+、Ti4+、RE3+(稀土元素)和Mn2+等,在pH=10的氨性介质中,用紫脲酸铵作指示剂,用H2O2完全氧化Co2+,用EDTA络合滴定法测定工业硫酸镍中的镍和钴。终点颜色变化敏锐、清晰。实际应用表明,本法具有简便、快速和准确度高等特点。 相似文献
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Fabrication of Long Lengths of Epitaxial Buffer Layers on Biaxially Textured Nickel Substrates Using a Continuous Reel-to-Reel Dip-Coating Unit 总被引:2,自引:0,他引:2
M. Parans Paranthaman Thomas G. Chirayil Fred A. List Xingtian Cui Amit Goyal Dominic F. Lee Eliot D. Specht Patrick M. Martin Robert K. Williams Donald M. Kroeger Jonathan S. Morrell David B. Beach Ron Feenstra David K. Christen 《Journal of the American Ceramic Society》2001,84(2):273-78
A low-cost, nonvacuum, solution precursor route has been developed to produce epitaxial oxide buffer layers of Eu2 O3 or La2 Zr2 O7 on biaxially textured Ni (100) tapes. A reel-to-reel continuous dip-coating unit consisting of a constant-tension tape transport system attached to a controlled atmosphere furnace was fabricated. Nickel tapes were pulled through a 2-methoxyethanol solution of europium methoxyethoxide/acetate or lanthanum zirconium methoxyethoxide. The double-sided dip-coated tapes were then annealed in a preheated furnace at 1000°–1100°C with a high flow rate of Ar/H2 (4%) gas. The dip-coated buffers were dense, continuous, crack-free, and epitaxial with a single cube texture. A critical current ( J c ) of >1 MA/cm2 at 77 K and self-field was obtained for YBa2 Cu3 O7-δ (YBCO) films with a layer sequence of YBCO ( ex situ BaF2 process)/CeO2 (sputtered)/YSZ (sputtered)/Eu2 O3 (dip-coated)/nickel. We have produced 1–2 m lengths of epitaxial buffer layers on textured nickel substrates using a nonvacuum process for the first time. 相似文献
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Chen-Bin Wang Guo-Yuan Gau Shiue-Jiun Gau Chih-Wei Tang Jia-Lin Bi 《Catalysis Letters》2005,101(3-4):241-247
Nanosized nickel oxide was synthesized by a simple liquid-phase process to obtain the hydroxide precursor and then calcined to form the oxide. The precursor and the nickel oxide were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), thermal analysis (TG) and temperature-programmed reduction (TPR). The results indicated that the particle size of nickel oxide was controlled by the calcined temperature (TC). Mixed phases of nickel oxide and nickel hydroxide were present as the TC was lower than 300 °C. Non-stoichiometric nickel oxide (NiOx, x = 1.2) was formed between 250 °C and 400 °C and a pure nickel oxide was formed as the TC arrived 500 °C. The particle size of nickel oxide changed as the calcined temperature was controlled under 250 °C, 300 °C, 400 °C and 500 °C, the order was 5.6 nm, 6.5 nm, 11 nm and 17 nm, respectively. 相似文献