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tin nickel alloys and baths of elettroplaccatura to deposit these alloys on various metal substrates
tin nickel alloys and baths of elettroplaccatura to deposit these alloys on various metal substrates
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机译:锡镍合金和elettroplaccatura镀液,以将这些合金沉积在各种金属基底上
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1484575 Electro-depositing tin-nickel alloy NASGLO INTERNATIONAL CORP 6 Aug 1974 [20 Aug 1973 24 June 1974] 34566/74 Headings C7A and C7B An alloy comprising 0À001-0À30 wt. per cent Ni, the balance Sn, useful as an electric contact; to replace conventional Au or Ni coatings; or to restore the appearance of Ag, is electro-plated from an aqueous bath comprising either a) Ni sulphate or sulphamate, a corresponding Sn salt and sulphuric, sulphamic or benzene sulphonic acid or b) Ni and Sn fluoborates and fluoboric acid; the bath having a pH no higher than 1, the Sn salt having a concentration at least 7À49 g/l, and the wt. ratio of the Ni and Sn salts being at least 0À20:1. A brightener may be added e.g. gelatine, 1-benzoyl acetone or N-benzyltrimethylammonium bromide or hydroxide. Non-corrodible and/or non-passivating anodes are used e.g. Ni, Pt or Pt on Ti; a mixture of Sn and Ni anodes is possible. Metallic or metallized substrates are referred to. Optimum conditions include an anodic c.d. below 25 asf, a temperature of 20-30‹C and an anode area double that of the cathode.
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机译:1484575电沉积锡镍合金NASGLO INTERNATIONAL CORP 1974年8月6日[1973年8月20日1974年6月24日] 34566/74税号C7A和C7B包含0‑001-0‑30 wt。 Ni,余量为Sn,可用作电触点;替代传统的金或镍涂层;或者为了恢复Ag的外观,从包含以下条件的水浴中进行电镀:a)硫酸镍或氨基磺酸镍,相应的锡盐和硫酸,氨基磺酸或苯磺酸,或b)氟硼酸镍和锡和氟硼酸;或pH值不高于1的镀液,锡盐的浓度至少为7‑49克/升,以及镍盐和锡盐的比率至少为0-20:1。可以添加例如增白剂。明胶,1-苯甲酰基丙酮或N-苄基三甲基溴化铵或氢氧化物。例如,使用不可腐蚀和/或非钝化阳极。 Ni,Pt或Ti上的Pt; Sn和Ni阳极的混合物是可能的。涉及金属或金属化的基材。最佳条件包括阳极c.d.低于25asf,温度为20-30℃,阳极面积为阴极的两倍。
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