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The questing for acidic middle-temperature electroless Nickel technology leads to the preferable prescription as follows:Proportion of Nickel Sulphate and Sodium Hypophosphate 0.36; Sodium Acetate 15g/L; Stabilizer A lmg/L(Stabilizer B Img/L for continual experiment); Composite complexing agent Lactic Acid 10ml/L and acetic acid 10 ml/L; Accelerator organic acid G 6g/L; pH value 5.0; Loading Capacity ldm2/L; Temperature 70C (Temperature 75C for continual experiment); Proportion of supplement for Nickel Sulphate and Sodium Hypophosphate 1:1.2; Testing the consumed ion of Nickel solution and supplement inspissations solution every 60min by the proportion of 15% fresh solution.

最后,通过研究得出最佳工艺配方为:硫酸镍与次亚磷酸钠的摩尔比为0.36;乙酸钠15g/L:稳定剂Almg/L(周期实验加稳定剂B10mg/L);复合络合剂组合为乳酸10ml/L+冰乙酸10ml/L:促进剂为有机酸G6g/L;pH值为5.0;装载量为1.0dm~2/L;施温度为70℃(周期实验为75℃):主盐与还原剂的添加比例1:1.2;每60分钟对后液进行镍离子浓度的测定并按镍离子的消耗量添加浓缩液,添加比例按开缸液的15%。

Wear and corrosion involve mechanical and electrochemical mechanisms, and the combined action of these mechanisms often result in significant mutual reinforcement. To measure the effect on wear-corrosion resistance of the chemical and abrasion wear separately at the same time, wear-corrosion synergism rate is selected to indicate the nature and degree of the chemical and abrasion wear.

腐蚀磨损是同时涉及力学因素和电化学因素的复杂的材料的流失过程,通常条件下,腐蚀磨损不是纯磨损和纯腐蚀的简单叠加,还有两者间的协同作用,为定量描述腐蚀与磨损的促进程度、进一步完善腐蚀磨损机理,本文利用腐蚀磨损协同作用率值的大小来分析腐蚀和磨损的交互作用程度,结果表明:本文制备的层,在5%H_2SO_4溶液中腐蚀磨损时,机械磨损是造成层表面材料流失的主要原因,腐蚀和磨损的协同作用为次要因素。

The results show that the Ni-Fe coatings are acid-resistant to HNO3 and H2SO4.For Ni-Fe alloys without exfoliation,the EIS is composed by a capacitive arc at high frequency and an inductive arc at low frequency, and the radius of capacitive arc decreases rapidly and the inductive component weakens and disappears with time.

结果表明:Ni-Fe合金层具有良好的耐酸腐蚀性;在3.5wt%NaCl溶液中,腐蚀发生之前的镍铁合金层的电化学阻抗谱由一个高频容抗弧和一个低频的感抗弧组成;随着浸泡时间的延长,容抗弧半径快速减小,感抗弧减弱并消失。

It was found that tin can be plated on the magnesium plate through scratching and dipping into used as interlay.

实验表明,锡可以通过刮擦浸方法在镁板上,从而起到夹层金属的作用。

Crystallinities and tribological characteristic are presented. The results show that the properties of PECVD TiN coating are affected by the gas composition inletting chamber,deposition temperature and ionization voltage.

结果表明,当N/H比为1、Ti/N比为21、沉积温度为400℃和离化电压为1500V时,层具有较好的机械性能及耐磨性能。X—射线衍射分析表明,在本试验条件下所获层均为(200)面择优取向。

Using Vegard's law to calculate the composition of the direct current plated Cu-Co solid solution was 89~96%. According to the result of XRD, the structure of Cu-Co alloy is mainly face-centered cubic phase.

在铜钴合金方面,利用Vegard式可以得到直流电的铜钴层所形成的固溶体,组成在89~96%之间,且由X光绕射得知钴层为面心立方的结构。

Effects of Cast Iron and Chromeplate Tap on Over Night Tap Water Quality;2. The develop ment status of current microcrack chromeplate technology is introduced.

三价铬铬在实际应用中最大的问题是工艺的稳定性差,而阳极是影响硫酸盐三价铬液稳定性的关键。

Inductively Couple Plasma Atomic Emission Spectrometry , X-ray diffraction , scanning electron microscope , microhardness testing and emergency cooling testing have been used to detect amorphous Fe-Ni-Cr deposits'properties, such as content, crystalline structure, microphotograph, hardness, adherence between deposit and substrate.

用等离子发射光谱、X-ray衍射、扫描电子显微镜、显微硬度法、骤冷法等方法对非晶态Fe-Ni-Cr合金层的结构、形貌、硬度以及层与基体的结合性能等进行了检测分析。

The resin composition for a platable substrate of the present invention is excellent in production stability such as moldability, dimensional stability, mechanical strength and plating properties, and is also environmentally friendly.

本发明的覆基材用树脂组合物具有良好的成型性等生产稳定性、尺寸精确度、机械强度、覆性能,另外也考虑到了环境保护。

Compared with Multiple Arc Ion plating, the thin-film of thermocouple which are developed by the Magnetron Spurting are more compactive and smooth, the contributions are close to the target, and the depth of TFT s hot junction is only 2.45 μ m.

与多弧离子法相比,采用磁控溅射法制的热电偶薄膜成分与靶材接近,膜层致密均匀、平整光滑,膜厚为2.45μm。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

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