次磷酸次磷酸

The addition of sodium hypophosphate must be appropriate , if added much , W and SiC contents in the coatings were decreased , So the addition of sodium hypophosphate must be controlled

次亚磷酸钠的添加量应适中，添加过多会降低镀层中 W 和 SiC 的含量，一般应控制在10~15g/L 之间。

The hardness and wear resistance of the RE-Ni-W-P-SiC composite coating increase with the rise of SiC and sodium tungstate concentrations in the bath respectively , while the hardness and wear resistance of the RE-Ni-W-P-SiC coating decrease with increasing sodium hypophosphate concentration in the bath.

随着镀液中次亚磷酸钠浓度的升高，镀层的硬度和耐磨性均降低。

According to the properties of acrylic acid series polymer of scale inhibition. A kind of amphiprotic tercopolymer of acrylic acid, acrylamide and dimethyldiallylammonium chloride is synthesised, with water as solvent, persulfate and hypophosphate as initiator. Through the tests, the copolymer can show the good scale inhibiting effect and bactericidal action, and become a multifunctional scale inhibition.

本研究根据丙烯酸聚合物阻垢剂的特点，使用过硫酸铵(NH_4_2S_2O_8、次亚磷酸钠(Na_2PO_3)构成的氧化——还原型引发剂，水为溶剂，合成了新型可用于处理工业循环冷却水的丙烯酸—丙烯酰胺—二甲基二烯丙基氯化铵两性型三元共聚物。

The questing for long service electroless Nickel technology leads to the preferable formula and operation conditions as follows: Nickel Sulphate 25g/L, Sodium Hypophosphate 30g/L, Lactic Acid 20~ 25ml/L, Citric Acid 5g/L, Sodium Acetate 15g/L, Thiourea l~3mg/L, Stabilizer E Img/L.

研究得出的最佳长寿命镀镍工艺为；硫酸镍25g/L，次亚磷酸钠30g/L，乳酸20ml/L，柠檬酸5g/L，乙酸钠15g/L，硫脲1～3mg/L，稳定剂E1mg／L镀液pH值5.0～5.1，施镀温度90±2℃，装载量1dm~2/L；每60min测量镀液中消耗的有效成分和补加浓缩液。

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；施镀温度为70℃(周期实验为75℃)：主盐与还原剂的添加比例1：1.2；每60分钟对镀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％。

The process of hypophosphite electrooxidation on a nickel electrode could be well simulated by this model.

结果表明，该模型能很好地模拟次亚磷酸根在镍电极上的电化学氧化过程。

Kinetics and mechanism of hypophosphite oxidation on a nickel electrode were studied by means of the electrochemical mass spectroscopy and kinetic model analysis.

用电化学质谱和动力学模型分析等方法研究了次亚磷酸根在镍电极上的电化学氧化机理和动力学。

The mechanism of electroless nickel deposition in sodium hypophosphite bath is discussed.

探讨了次亚磷酸钠体系化学镀镍沉积机理。

Therefore, the deposit using sodium hypophosphite as reductant was more suitable for the industries which had a relatively low requirement on conductance.

因此，次磷酸钠为还原剂的化学镀铜工艺更适宜应用于对导电性要求相对较低的行业。

The resistance, tensile strength and ductibility of formaldehyde's deposit were better than that from sodium hypophosphite solution.

以甲醛为还原剂的化学镀铜层的电导率、抗拉强度、延伸率等物理性能均优于次磷酸钠化学镀铜层。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。