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1. 发明申请

WO1997046732A1 INTERNALLY TIN-PLATED COPPER PIPE MANUFACTURING METHOD 审中-公开
标题翻译：内置铜管制造方法
公开(公告)号：WO1997046732A1
公开(公告)日：1997-12-11
申请号：PCT/JP1997001752
申请日：1997-05-22
申请人： SUMITOMO LIGHT METAL INDUSTRIES, LTD. , ITO, Junichi , ATSUMI, Tetsuro , YONEMITSU, Makoto , NISHIMOTO, Yoshihiro , OKAMURA, Hiroshi
发明人： SUMITOMO LIGHT METAL INDUSTRIES, LTD.
IPC分类号： C23C18/52
CPC分类号： C23C18/54 , C23C18/1651 , C23C18/168 , C23C18/31
摘要： A method of forming a layer of coating of tin on an inner surface of a copper pipe by passing a substitutional electroless tin plating liquid through an inner portion of the pipe, comprising a first plating step in which the plating is done by regulating a deposition rate of a layer of coating of tin so that a value obtained by dividing a total copper ion concentration in the portion of the plating liquid which has passed through the inner portion of the copper pipe and just flowed out therefrom by a concentration of bivalent tin ions in the same plating liquid becomes not more than 0.8, and a second plating step in which the plating is done with the temperature of the plating liquid set higher than that of the plating liquid in the first plating step. A plating liquid preferably used is a plating liquid containing 0.05-0.3 mol/l of positive bivalent Sn ion, 0.5-2.0 mol/l of thiourea, 0.5-2.0 mol/l of sulfuric acid, 0.05-2.0 mol/l of alkyl benzene sulfonic acid and 0.5-5.0 g/l of nonionic surface active agent. A corrosion resisting internally tin-plated copper pipe used as a water supply pipe, a hot water supply pipe and a heat exchanger pipe can be manufactured in the form of a long size coil, and a layer of coating of tin thus formed has small scatter of thickness, and high adhesion and a high corrosion resistance.
摘要翻译：一种在铜管的内表面上形成锡涂层的方法，该方法通过使取代的无电镀锡液通过管的内部，包括第一镀层步骤，其中通过调节沉积速率进行电镀的镀层，使得通过将通过铜管内部的电镀液的部分中的总铜离子浓度除以由二价锡离子浓度刚刚流出的值而得到的值相同的电镀液变得不大于0.8，并且在第一电镀步骤中，在电镀液的温度设定为高于电镀液的温度的情况下进行电镀的第二电镀步骤。优选使用的电镀液是含有0.05-0.3mol / l的正二价Sn离子，0.5-2.0mol / l的硫脲，0.5-2.0mol / l的硫酸，0.05-2.0mol / l的烷基苯磺酸和0.5-5.0g / l非离子表面活性剂。用作供水管的耐腐蚀内部镀锡铜管，热水供应管和热交换器管可以制成长尺寸线圈的形式，并且由此形成的锡涂层具有小的散射的厚度，高粘合性和高耐腐蚀性。

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