GB299071A - Improvements in the method of and apparatus for electrolytically depositing metal onthe interior of metal tubes - Google Patents
Improvements in the method of and apparatus for electrolytically depositing metal onthe interior of metal tubesInfo
- Publication number
- GB299071A GB299071A GB10779/27A GB1077927A GB299071A GB 299071 A GB299071 A GB 299071A GB 10779/27 A GB10779/27 A GB 10779/27A GB 1077927 A GB1077927 A GB 1077927A GB 299071 A GB299071 A GB 299071A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubes
- anodes
- rings
- secured
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/04—Tubes; Rings; Hollow bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
- B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
- B28B21/12—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means tamping or ramming the material or the mould elements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
299,071. Martin, F. G., and Ramsay, W. April 22, 1927. Electrodes; cells; electrolytes, cooling; chromium, depositing. - In coating metal tubes internally, flexible anodes are employed and are maintained in a central position by tensioning means which do not stress the tubes themselves. The invention is particularly applicable to the internal coating of long and narrow tubes such as condenser tubes with chromium. The end parts of the tubes may also be coated externally. In the apparatus shown in Fig. 1, the tubes a pass through tapered holes in a ring f, in which they are secured by split collets a<1> and nuts a<2>; the tubes also pass through guiding apertures in lower rings g. Alternatively the tubes may be secured by split collets a<3> entering tapered holes in one of the rings g no nut being necessary in this case. The lower end of each anode b is formed by knotting or otherwise with a button b<1> over which is fitted a tapered bush h<1> adapted to engage a tapered aperture in a ring h. The anodes are secured near the top by set-screws n<2> in insulating collars n<1> which are pressed upwardly by springs n abutting against insulating bushes e<1> set in a ring e. The flexible anodes may be of stranded copper cable highly compressed and covered with lead, or they may be of steel not covered with lead. The anodes may have rigid ends b<2> consisting, for example, of steel sleeves passed over the cable to assist threading through the tubes. The rings d - - h are mounted with spacing washers l on bolts i, formed with rounded ends serving as feet on which the frame so formed rests in the tank k. The top ring d which is smaller than the rest is provided with outwardly extending clips d<2> engaging the anodes b and also rods c supporting external tubular or ring-shaped anodes c<1>, c<2>. The ring d is provided with a terminal post d<3> and is insulated from the bolts and spacers l by washers d<1>. An extension o of one of the bolts i serves as negative terminal. The tank is provided with a cooling pipe or coil u. The ends of the tubes a may be provided with vulcanite caps v, Fig. 7, having apertures w for the passage of the anodes and apertures x for the circulation of electrolyte. Alternative methods of mounting the tubes and anodes on the rings and the rings on the bolts are described. In one modification, Fig. 3, the supporting and guiding rings &c. are replaced by horizontal bars f, g, h supported by end bars p. The frame is surmounted by a hood r connected by a pipe r<5> to a fan for the withdrawal of gases. The negative terminal r<2> is secured to the hood. The anodes b are secured in screw-threaded sleeves t and are tensioned by means of nuts t<1> abutting against a bus-bar s separated from the top of the hood r bv washers r<1>. The lower ends of the anodes are provided with lead covered buttons q. The external anodes c are also secured to the bus-bars s. The vertical part of the external anodes may have a steel covering; the rings may be of copper covered with lead. Means may be provided for supplying current to both ends of the flexible anodes. The tubes, mounted in the frames, may be pickled by dipping in waste chromic acid with or without sulphuric acid before plating and washed after plating, suitable lifting means being provided. When coating brass tubes with chromium, the frame may be lowered into the plating bath before the current is switched on; when iron or steel tubes are to be coated, the current should be switched on before immersion. Specification 299,100, [Class 64 (iii), Surface apparatus &c.], is referred to.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL22352D NL22352C (en) | 1927-04-22 | ||
GB10779/27A GB299071A (en) | 1927-04-22 | 1927-04-22 | Improvements in the method of and apparatus for electrolytically depositing metal onthe interior of metal tubes |
DEST43178D DE472937C (en) | 1927-04-22 | 1927-09-13 | Device for electrolytic inner lining of metal pipes |
FR641037D FR641037A (en) | 1927-04-22 | 1927-09-16 | Process improvements and apparatus for electroplating metal tubes |
US222829A US1783885A (en) | 1927-04-22 | 1927-09-29 | Apparatus for electrolytically depositing metal on metal tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB10779/27A GB299071A (en) | 1927-04-22 | 1927-04-22 | Improvements in the method of and apparatus for electrolytically depositing metal onthe interior of metal tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB299071A true GB299071A (en) | 1928-10-22 |
Family
ID=9974099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10779/27A Expired GB299071A (en) | 1927-04-22 | 1927-04-22 | Improvements in the method of and apparatus for electrolytically depositing metal onthe interior of metal tubes |
Country Status (5)
Country | Link |
---|---|
US (1) | US1783885A (en) |
DE (1) | DE472937C (en) |
FR (1) | FR641037A (en) |
GB (1) | GB299071A (en) |
NL (1) | NL22352C (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE743712C (en) * | 1940-01-30 | 1943-12-31 | Messerschmitt Boelkow Blohm | Hanging device for electrolytic hard chrome plating relatively long, cylindrical workpieces to be provided with a chrome metal layer on the inside, in particular of liners for opposed piston engines |
BE455028A (en) * | 1940-01-31 | |||
GB2389370B (en) * | 2002-06-06 | 2006-07-12 | Anopol Ltd | Improvements in stent manufacture |
EP1655091A1 (en) * | 2004-11-09 | 2006-05-10 | Siemens Aktiengesellschaft | Method for electrolytically processing a workpiece and workpiece having a through hole |
-
0
- NL NL22352D patent/NL22352C/xx active
-
1927
- 1927-04-22 GB GB10779/27A patent/GB299071A/en not_active Expired
- 1927-09-13 DE DEST43178D patent/DE472937C/en not_active Expired
- 1927-09-16 FR FR641037D patent/FR641037A/en not_active Expired
- 1927-09-29 US US222829A patent/US1783885A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1783885A (en) | 1930-12-02 |
NL22352C (en) | |
DE472937C (en) | 1929-03-08 |
FR641037A (en) | 1928-07-26 |
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