US3061527A - Batch process of edge plating aluminum ribbon with material that is readily soldered to other materials - Google Patents

Batch process of edge plating aluminum ribbon with material that is readily soldered to other materials Download PDF

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Publication number
US3061527A
US3061527A US30210A US3021060A US3061527A US 3061527 A US3061527 A US 3061527A US 30210 A US30210 A US 30210A US 3021060 A US3021060 A US 3021060A US 3061527 A US3061527 A US 3061527A
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United States
Prior art keywords
roll
ribbon
plating
aluminum
zinc
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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 - Lifetime
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US30210A
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English (en)
Inventor
Bernard C Karner
Valley Robert J La
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American Radiator and Standard Sanitary Corp
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American Radiator and Standard Sanitary Corp
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Priority to NL255385D priority Critical patent/NL255385A/xx
Application filed by American Radiator and Standard Sanitary Corp filed Critical American Radiator and Standard Sanitary Corp
Priority to US30210A priority patent/US3061527A/en
Priority to BE594406A priority patent/BE594406A/fr
Application granted granted Critical
Publication of US3061527A publication Critical patent/US3061527A/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
    • C25D5/44—Aluminium

Definitions

  • a further object of the invention resides in the use of the zinc-immersion plating process whereby an entire flat roll of aluminum ribbon may have its side edges plated by merely immersing the entire roll into a series of plating and rinsing baths to apply to the edges thereof a readily solderable metallic material.
  • a further object of the invention is to provide a process for plating the side edges of a roll of aluminum ribbon material in which the entire roll is zinc coated by 'immersion in a dilute solution of zinc oxide and caustic soda at room temperature, followed by an electro-plating process to apply a solderable material such, for example, as copper, tin or bronze to the zinc-coated side edges of the ribbon material.
  • FIG. l is a plan view of a coil of aluminum ribbon material, to the side edges of which it is desired to apply a readily solderable substance;
  • FIG. 2 is a side elevational view of the coil of FIG. l;
  • FIG. 3 is a diagrammatic view of the preferred plating process
  • FIG. 4 is a diagrammatic view of the treatment of the aluminum coil subsequent to plating.
  • FIG. 5 is a much enlarged cross-sectional view of the ribbon material, showing the solderable material applied to the opposite side edges thereof.
  • the aluminum roll which is treated according to the present invention is illustrated in FIGS. l and 2.
  • the roll 10 comprises a series of tightly wound convolutions 12 of aluminum ribbon.
  • the ribbon is wound tightly so that a minimum of plating solution will seep between the layers.
  • the roll may contain about 8500 linear feet, al-
  • the aluminum ribbon is wound around a metal drum 14 and strapped in place by straps 16.
  • the metal drum may serve as part of the electrical contact for the electro-plating steps.
  • the resultant disc-shaped units may be plated, several at a time, just as though they were solid pieces.
  • the aluminum ribbon which is wound around the drum 14 to form the discs is preferably twice the width of the desired finished material. This reduces the net plating costs considerably because it is usually only necessary to have one edge of the ribbon plated, by providing the ribbon double size, it is possible to cut it into two desired width ribbons to yield twice the production.
  • the cutting operation does not increase the cost appreciably because it can be included in the last operation which requires that the ribbon be unwound, cleaned, dried and recoiled for storage.
  • the plating process is the well-known zinc-immersion plating process.
  • ya coating of zinc is first chemically applied to the aluminum as an undercoat preparatory to electro-plating other materials onto the aluminum.
  • the zinc-immersion process is considered to be the most practical method of plating aluminum. This method is described in detail in the paper Plating on Aluminum Alloys, by Fred Keller and Walter G. Zelley of Aluminum Company of America, published in the thirty-sixth Annual Proceedings of the American Electroplaters Society.
  • the method consists of immersing a clean piece of aluminum with a uniform oxide lm thereon into a sodium zincate solution. This causes the oxide coating to dissolve, exposing the pure aluminum. The pure aluminum then replaces the zinc in the zinc salt solution and then, as this occurs, the piece of aluminum becomes covered with a very thin lm of pure Zinc. As soon as the entire surface is covered with zinc, the action virtually stops and the material may then be plated with heavier coatings of material suitable for soft soldering.
  • the rst tank 18 contains an alkaline cleaner
  • the second tank 20 contains a water rinse
  • the third tank 22 contains the zinc-immersion solution
  • the fourth tank 24 is an acid rinse
  • the fifth tank 26 is a water rinse
  • the sixth tank 28 is an electro-plating tank for applying a copper lm
  • the seventh tank 30 contains a solution for bronze-electroplating
  • the eighth tank 32 is a water rinse.
  • the aluminum roll is first dipped in tank 18 to clean and condition the aluminum surface by removal of oil, grease, dirt and other contamination.
  • a suitable cleaner is a water solution of 3% sodium carbonate and 3% sodium phosphate.
  • the temperature of the solution may be 14C-180 F. and the roll should remain in the solution for from one to three minutes.
  • the roll is dipped in water rinse tank 20 as indicated by arrow A.
  • This rinse step removes the alkaline cleaner material and prevents contamination of the solutions in the remaining tanks.
  • the roll After the roll has been rinsed in tank 20, it is dipped in the zinc-immersion tank 22, as indicated by arrow B.
  • the first Zinc-immersion is not intended as the final zinc coating step, but rather is a conditioning treatment to remove the surface oxide lm present on the aluminum and further condition the surface for plating.
  • the rst zinc coating is subsequently followed by a second zinc coating.
  • ⁇ a hot acid etch in a sulfuric acid solution may be used to remove the surface oxide lm and other undesirable constituents.
  • the roll is again rinsed in tank 20 as indicated by arrow C.
  • the roll is then dipped in tank 24 as indicated by arrow D.
  • Tank 24 contains a nitric acid solution and removes the rst Zinc coating.
  • the roll After the acid rinse, the roll is rinsed in a second water rinse contained in tank 26 as indicated by arrow E.
  • the roll is then again immersed in the zinc-immersion tank 22 as shown by arrow F -at which time the nal zinc coating is applied.
  • the roll is again water rinsed in tank 26 as indicated by arrow G.
  • the final zinc coating has now been applied and the readily solderable material may be electro-plated thereon.
  • the roll may be conventionally electro-plated in tank 28 to coat the zinc surface film with a thin layer of copper. This step is known as a copper strike.
  • the copper strike is not absolutely necessary but it is preferred to give a good bond for the final plating of readily solderable material. This electroplating operation takes about five minutes.
  • the roll is again water rinsed in tank 26 as indicated by arrow I.
  • the roll is electro-plated in tank 30, which contains means for bronze plating. This plating step takes about five minutes.
  • the bronze plate is the readily solderable material referred to.
  • the roll is water rinsed in tank 32 as indicated by arrow K. This completes the plating process.
  • the ribbon As shown in FIG. 4, after the ribbon has been plated, it is unwound, passed through a pair of rollers 34, 36 and into a wash-and-dry station 38. Upon exiting from the wash-and-dry station, the ribbon is again passed through a pair of rollers 40, 42 at which time it is split along its longitudinal axis into two strips 44, 46.
  • the splitting operation may simply comprise a knife-edge positioned adjacent the rollers 40, 42.
  • a pair of rollers 48, 50 then direct the strips onto a pair of drums 52, 54 for rewinding. The resultant coils may then be stored until used.
  • the aluminum ribbon 56 before being slit into two strips, has a coating 58, 60 on each edge thereof.
  • This coating is readily solderable and does not require special soldering techniques to form a bond with other solderable materials.
  • the application of the readily solderable material as indicated in the proposed plating process would result in a nal roll having its convolutions stuck together by the plating material so as to prevent unwinding.
  • the zinc coating is a very thin layer of metallic zinc. It is chemically applied and there is no bridging over from one convolu tion of the roll to the next.
  • the subsequent copper strike and bronze-plated coating will be applied to only the zinc coating, not to the adjacent aluminum. Consequently, the subsequent plating will not bridge over. Therefore, the convolutions do not stick together and may be readily unwound at the end of the process.
  • the readily solderable material referred to may be such as bronze, copper, tin, or silver and the like.
  • the readily solderable material may be applied directly to the zinc coating if desired, however, best results are obtained when a copper strike is used before application of the readily solderable material.
  • a method of rendering the side edge portions of aluminum ribbon material solderable comprising, providing the ribbon material in a spirally wound roll having a plurality of convolutions; said roll having side surfaces formed by the side edge porions of the ribbon; applying a coating of zinc over the entire side surfaces of said roll; and thereafter applying a coating of readily solderable metallic material over the zinc coating on said roll; whereby when said roll is unwound only the side edges will be coated with the readily solderable metallic material.
  • a method of rendering the side edge portions of aluminum ribbon material solderable comprising, providing the ribbon material as a spirally wound roll having a plurality of tightly wound convolutions; said roll having side surfaces formed by the side edge portions of the ribbon; cleaning the outer surface of said roll of contaminants; applying a rst coating of zinc on the entire side surfaces thereof by immersing the entire roll in a zinc-immersion bath; removing said first zinc coating by means of an acid; applying a second zinc coating over the entire side surfaces thereof by again immersing the roll in a Zinc-immersion bath; electro-plating a thin layer of copper over said second zinc coating; and then electroplating a layer of readily solderable metallic material over said copper layer, whereby when said roll is unwound only the side edges will be coated with the readily solderable metallic material.
  • the method of rendering the side edge portions of aluminum ribbon material solderable comprising, providing the ribbon material in a spirally wound roll having a plurality of tightly wound convolutions; said roll having side surfaces formed -by the side edge portions of the ribbon; and then electro-plating a readily solderable metallic material over the entire side surfaces of the roll by immersion of the roll into a series of electro-plating baths; whereby when said roll is unwound only the side edges of the ribbon material will be coated with the readily solderable metallic material.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Coating With Molten Metal (AREA)
US30210A 1960-05-19 1960-05-19 Batch process of edge plating aluminum ribbon with material that is readily soldered to other materials Expired - Lifetime US3061527A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL255385D NL255385A (enrdf_load_stackoverflow) 1960-05-19
US30210A US3061527A (en) 1960-05-19 1960-05-19 Batch process of edge plating aluminum ribbon with material that is readily soldered to other materials
BE594406A BE594406A (fr) 1960-05-19 1960-08-25 Procédé discontinu pour le placage des bords d'un ruban en aluminium à l'aide d'une matière pouvant être aisément soudée ou brasée à d'autres matières.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30210A US3061527A (en) 1960-05-19 1960-05-19 Batch process of edge plating aluminum ribbon with material that is readily soldered to other materials

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US3061527A true US3061527A (en) 1962-10-30

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BE (1) BE594406A (enrdf_load_stackoverflow)
NL (1) NL255385A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3455021A (en) * 1964-09-14 1969-07-15 Anaconda Wire & Cable Co Method of making electrically insulated copper strip conductors
US4116803A (en) * 1977-05-11 1978-09-26 Kolosov Ivan A Method and apparatus for forming cermet electrodes for alkaline accumulators
DE3336743A1 (de) * 1983-10-08 1985-04-25 GFP Gesellschaft für Putze, Baumaterialien u. Wärmedämmsysteme mbH, 4799 Borchen Kunststoffmasse fuer kunststoff-flachverblender und kleber
US4852791A (en) * 1986-09-04 1989-08-01 Showa Aluminum Kabushiki Kaisha Method for making corrosion resistance heat exchangers
US4946090A (en) * 1987-08-18 1990-08-07 Ferranti International Signal, Plc Seals between ceramic articles or between ceramic articles and metal articles
US4948031A (en) * 1986-11-10 1990-08-14 Hazeltine Corporation Process for bonding aluminum with cadmium and product thereof
US4989776A (en) * 1988-08-04 1991-02-05 Gec Ferranti Defence Systems Limited Method of brazing articles containing aluminum
US5110035A (en) * 1990-02-01 1992-05-05 Westinghouse Electric Corp. Method for improving the solderability of corrosion resistant heat exchange tubing
US5151332A (en) * 1986-11-10 1992-09-29 Hazeltine Corporation Aluminum sheets bonded with cadmium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436227A (en) * 1944-06-16 1948-02-17 Hastings Mfg Co Method of forming piston ring elements of ribbon steel
US2668936A (en) * 1948-05-26 1954-02-09 Sprague Electric Co Electrical condenser
US2887766A (en) * 1955-06-27 1959-05-26 Borg Warner Composite metal articles
US2891309A (en) * 1956-12-17 1959-06-23 American Leonic Mfg Company Electroplating on aluminum wire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436227A (en) * 1944-06-16 1948-02-17 Hastings Mfg Co Method of forming piston ring elements of ribbon steel
US2668936A (en) * 1948-05-26 1954-02-09 Sprague Electric Co Electrical condenser
US2887766A (en) * 1955-06-27 1959-05-26 Borg Warner Composite metal articles
US2891309A (en) * 1956-12-17 1959-06-23 American Leonic Mfg Company Electroplating on aluminum wire

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3455021A (en) * 1964-09-14 1969-07-15 Anaconda Wire & Cable Co Method of making electrically insulated copper strip conductors
US4116803A (en) * 1977-05-11 1978-09-26 Kolosov Ivan A Method and apparatus for forming cermet electrodes for alkaline accumulators
DE3336743A1 (de) * 1983-10-08 1985-04-25 GFP Gesellschaft für Putze, Baumaterialien u. Wärmedämmsysteme mbH, 4799 Borchen Kunststoffmasse fuer kunststoff-flachverblender und kleber
US4852791A (en) * 1986-09-04 1989-08-01 Showa Aluminum Kabushiki Kaisha Method for making corrosion resistance heat exchangers
US4948031A (en) * 1986-11-10 1990-08-14 Hazeltine Corporation Process for bonding aluminum with cadmium and product thereof
US5151332A (en) * 1986-11-10 1992-09-29 Hazeltine Corporation Aluminum sheets bonded with cadmium
US4946090A (en) * 1987-08-18 1990-08-07 Ferranti International Signal, Plc Seals between ceramic articles or between ceramic articles and metal articles
US4989776A (en) * 1988-08-04 1991-02-05 Gec Ferranti Defence Systems Limited Method of brazing articles containing aluminum
US5110035A (en) * 1990-02-01 1992-05-05 Westinghouse Electric Corp. Method for improving the solderability of corrosion resistant heat exchange tubing

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Publication number Publication date
BE594406A (fr) 1961-02-27
NL255385A (enrdf_load_stackoverflow)

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