厚膜阴极电泳漆的特点及其发展趋势

厚膜型阴极电泳漆是阴极电泳漆的新一代产品，其膜厚明显高于一般电泳漆。介绍了厚膜电泳漆的特点及其发展方向。     

Effects of temperature and current density on the surface hardness and tribological properties of Ti-6Al-4V alloy by molten salt carburization

Surface hardening of Ti-6Al-4V alloy was achieved by carburization in a molten salt bath containing BaCO₃ as the carbon-yielding agent with electrolysis within the temperature range 790–930°C. The hardness of the total carburizing layer (TCD) is influenced by the bath temperature, the applied current density and the carburizing period. The major hardening effect is considered to be the formation of a solid solution of carbon in -Ti. The oxide film wrapping at the outermost surface of cathodically charged specimens, identified to be mainly BaTiO₃, was formed irrespective of the bath temperature during the quenching process and has no effect on the surface hardening. The optimal carburizing parameters obtained in this study for surface hardening are carburizing at 930±10°C (bath temperature) and 0.3 A/Cm² (applied current density) for 90 min (carburizing period), while those for tribological properties improvement are carburizing at 860±5°C and 0.3 A/Cm² for 90 min.     

Effect of bath composition on properties of electroless deposited Co–P/Ni foam catalyst for hydrolysis of sodium borohydride solution

The effect of bath composition on the properties of electroless deposited Co–P/Ni foam catalyst for hydrolysis of sodium borohydride solution was investigated by varying the bath composition. The NaH₂PO₂/CoCl₂ and NH₂CH₂COOH/CoCl₂ concentration ratio had a strong effect on the catalyst properties. The effect of NH₂CH₂COOH/CoCl₂ was larger than that of NaH₂PO₂/CoCl₂ for the concentration ratio range with practical deposition rates. The optimum concentration ratio of the coating bath was CoCl₂:NH₂CH₂COOH:NaH₂PO₂ = 1:4:10. As the concentration of each component increased at the optimum concentration ratio, the coating bath decomposed on its own. As the amount of solute dissolved in the coating bath increased, the coating bath became unstable. The optimum composition of the stable coating bath to realize Co–P/Ni foam catalyst with good catalytic activity was 0.1 m (molality, mol/kg) CoCl₂, 0.4 m NH₂CH₂COOH, and 1.0 m NaH₂PO₂. The weight percent of the deposited catalyst and hydrogen generation rate per deposited catalyst of 1 g at optimum composition were 8.39 wt% and 0.93 L/min·g (deposited catalyst), respectively. The bath composition was found to have a great effect on the Co–P/Ni foam catalyst properties and coating bath stability.     

Upgrading Computational Design

Shajay Bhooshan heads up the computation and design ZHACODE group at Zaha Hadid Architects (ZHA) and is a course master at the Architectural Association Design Research Laboratory (AADRL). Here he argues that Parametricism 2.0 has a vital role to play in the progressing of computational design. Assimilating the exploratory developments of the last 15 years, he asserts how the next phase of Parametricism will enable a further consolidation and evolution of digital practices.     

底吹小气量复吹转炉中顶枪的作用、地位及合理参数的探讨

在顶/底复吹转炉水模中,作了顶底、吹参数对熔池搅拌混匀时间和钢、渣混合状况影响的试验,并在工业性转炉中,作了顶、底吹参数对纯供氧时间、去磷偏离平衡系数、钢铁料消耗和终渣氧化铁含量影响的试验。结果表明:(1)对于底吹中等或中等以上气量[qb≥0.08～0.1标米~3/(分·吨)]的顶/底复吹转炉,顶枪可用高枪定位操作;对于底吹小气量[qb<0.08标米~3/(分·吨)]的复吹转炉,必须重视发挥顶枪调节熔池搅拌混匀时间和钢、渣混合的作用;(2)底吹小气量[gb=0.03～0.06标米~3/(分·吨)]复吹转炉的优越性,需要在吹炼前中期实行高氧压、高强度、高枪位操作,控制冲击熔池深度比 hT/H=0.3和终期采用压枪操作(其 LT=18～20dT,T=1.5～2.0τT.s,hT/H=0.6)才能充分发挥;底气的作用则在于保持吹炼平稳,使上述顶枪操作得以实现。     

Thermodynamic and experimental study of chemical bath deposition of Zn(S,O,OH) buffer layers in basic aqueous ammonia solutions. Cell results with electrodeposited CuIn(S,Se)2 absorbers

This paper presents a thermodynamic study of Chemical Bath Deposition (CBD) of zinc sulphide based films in aqueous ammonia solutions. The aim is a better understanding of ammonia and temperature effects on the deposition conditions and films composition. The formation of solid phases has been predicted by means of the precipitation conditions of ZnO, Zn(OH)₂ and ZnS as a function of temperature between 298 and 333 K. Films have been deposited according to calculated diagrams and preliminary results on solar cells based on electrodeposited CuIn(S,Se)₂ layers have been demonstrated. Composition and thickness of the films have been extracted to link the theoretical study with experiments.     

Electrochemical studies of Zn-Ni alloy coatings from non-cyanide alkaline bath containing tartrate as complexing agent

The Zn-Ni alloys have been electro-deposited from a non-cyanide alkaline bath containing tartrate as a complexing agent for Ni²⁺ ions. A water soluble polymer is used as a brightener. It was prepared by the reaction of epiclorohydrin with hexamethylenetetramine and mercaptobenzimidazol. Its effect on co-deposition process was examined. It was found that adding brightener in plating bath has a great effect on the cyclic voltammogram and galvanostatic measurements during the electrodeposition. Under the examined conditions, the electrodeposition of the alloys was of anomalous type. X-ray diffraction measurements revealed that the alloys consisted δ-phase (Ni₃Zn₂₂). The composition and morphology of the deposits were also studied by using scanning electron microscopy (SEM) and energy dispersive analysis X-ray (EDAX), respectively. The effect of optimum plating bath conditions on the corrosion resistance is studied by Tafel polarization.     

影响化学镀Ni-P合金稳定性因素

通过对化学镀Ni-P 合金络合剂,抑制剂和还原剂等作用进行的分析,对化学镀Ni-P合金工艺条件进行了试验研究,确定了影响镀液稳定性和镀层性能的因素,达到对镀层质量有效控制的目的。     

西安高校洗浴IC卡智能管理节水的调查分析

叙述了西安部分高校洗浴系统采用IC卡智能管理的情况及使用IC卡的调查情况，调查结果表明，使用洗浴IC卡后可较原用水量节约50％。     

含水气井泡沫排水采气工艺设计

泡沫排水采气是开发积水气田的一项重要的增产措施.文章介绍了泡沫排水采气工艺的原理和设计方法,并通过对辽河油田欢喜岭09井进行泡沫排水采气工艺设计的实践,提出了需要注意的有关问题.