Magnetic materials

专利名称：Magnetic materials发明人：JAMES JOHN A.申请号：US37797853申请日：19530901公开号：US2792340A公开日：19570514

摘要：753,455. Electrolytic production of iron sheets. BRITISH THOMSON-HOUSTONCO., Ltd. Aug. 26, 1953 [Sept. 15, 1952], No. 23107/52. Class 41. A process of producing asheet of iron consists in preparing a sheet of metallic substrate material of cubicstructure having the majority of its crystals aligned so that two adjacent cube edges liesubstantially in the plane of the sheet, electrolytically depositing iron on the substrateusing an electrolyte of ferrous chloride at a temperature of not less than 50‹ C. and acurrent density of 1 amp/dm2 until a coating of at least 0.002 inches has been obtained,and separating the coating from the substrate. A substrate of gold may be used, which isfirst cold rolled and then annealed at 1000‹ C. for one hour. Substrates of copper, iron,nickel, aluminium, or a nickel-iron alloy containing 50 per cent nickel, may also be used.The iron may be deposited from 600 gms. of FeCl2.4H 2 O per litre of water at a pH of1.8 and at 70‹ C. The iron sheet obtained in this way may be used as a \" master \" forproducing further sheets by first electrodepositing silver or tin on the \" master\" (90 gms.Na 2 SnO3. 3H 2 O and 7.5 gms. NaOH in 1 litre of water at cathode current density of 0.1amps/dm2 and at 70‹ C., with tin anodes, may be used), iron then being electrodepositedon the coating as before. The so-deposited iron sheet is then removed, e.g. by meltingthe intermediate metal, or in the case of tin, by exposing the sheet to chlorine.

申请人：THE BRITISH THOMSON-HOUSTON COMPANY LIMITED

更多信息请下载全文后查看