用镀锡铈合金代替镀银

主要介绍了锡铈合金电镀工艺、镀液配方及工艺条件。经高温、低温、高温高湿等11种试验,证明锡铈合金镀层的性能全部达到镀银层性能。用镀锡铈合金代替镀银可节约大量贵重金属。具有一定的推广和实用价值。     

Chromium Plating

By arrangement with the British Non-Ferrous Metals Research Association, the work described in this paper was carried out at the Research Department, Woolwich, with the aid of funds provided by the International Tin Research and Development Council.     

Peen Plating

A new method of applying metallic coatings by peening is described. Details are given of the methods, materials and equipment used and reference is made to the limitations and advantages of the process and the properties of the coatings. The theory and mechanism of peen deposition is discussed.     

氯化钾镀液直接转化锌镍合金镀液

近年来 ,钢铁制品保护性镀层的发展迅速 ,如锌 镍合金镀层和锌 铁合金镀层。特别是前者的耐蚀性比传统锌镀层高 3～ 5倍 ,现已在汽车、摩托车、船舶、航天航空、轻工等产品上得到应用。锌 镍合金镀液有酸性和碱性两种。酸性镀液 ,与氯化物镀锌相似 ,以氯化锌、氯化镍作为主盐 ,以氯化钾、氯化铵作为导电盐 ,同时添加与氯化物镀锌类似的光亮剂[1] 。因此 ,氯化钾 (钠 )镀锌液直接转化锌 镍合金镀液方法简单可行。1　电镀锌镍合金应用配方[2 ]氯化锌 (ZnCl2 ) 70～ 80 g/L氯化镍 (NiCl2 ·6H2 O) 10 0～ 12 0 g/L氯化钾 (KCl) 15 0～ 2…     

Barrel Plating Technique

A test is described which can be used to accelerate the deterioration of contact surfaces in a way that follows that experienced in natural environments in an industrial area. Porosity testing of precious metal platings is not sufficient to evaluate contact structures where the criterion is satisfactory performance and not visual appearance. The historical background of the industrial atmosphere test is given and some examples to illustrate the correlation of test results with service experience.