US2606866A - Method of treating tin plate - Google Patents

Method of treating tin plate Download PDF

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Publication number
US2606866A
US2606866A US56843A US5684348A US2606866A US 2606866 A US2606866 A US 2606866A US 56843 A US56843 A US 56843A US 5684348 A US5684348 A US 5684348A US 2606866 A US2606866 A US 2606866A
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United States
Prior art keywords
tin
strip
oxide
treating
chromate
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Expired - Lifetime
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US56843A
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English (en)
Inventor
Richard A Neish
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United States Steel Corp
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United States Steel Corp
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Filing date
Publication date
Priority to BE487191D priority Critical patent/BE487191A/xx
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to US56843A priority patent/US2606866A/en
Priority to GB33657/48A priority patent/GB651707A/en
Application granted granted Critical
Publication of US2606866A publication Critical patent/US2606866A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/38—Chromatising

Definitions

  • thermore to serve Patented Aug. 12 1952 ma s Tme s new 7 i Richard :A.-Neis.h, 'Piittsb ssh ita s s teel Company, a corporation of enl a e emer 12a@ a am sae V.
  • This invention relates to an improved method of treating tin-plate such asithat iised inmaking cans.
  • the object of the invention is to prodace tin-plate which is resistant to the formation of yellow stain during storage, to discoloration such as occurs during the heatfcuring o'f enamels, to
  • etching, and to sulfide staining such asccustom-arily occurs in the canhand is adapted, furas a suitable base for subsequentlacquering.
  • Neither-one is "s'ufiiciently efiective alone, however, to prevent this discoloration, although a dense coating of anodic oxidegive's some protection and increases resistance to sulphide stain ing.
  • Another prior method of treating .tin5plate makes use of the fact that tin ox desformcomplex compounds with many'pas'sivating radicals (chromates, phosphates, molybdates, etc.) which provide a surface layerinhibitingjtofa degree, further oxidation as well chemical attack: by dilute acids or alkalies. a treatment converts only t the outer surface of the original oxide, and the surface portion so.
  • this superficial protectivelayer does not ofier comparable, resistance to sulfi'de. staining' or to chemical'attack, and is toufndto'be less resistant to mechanical abra s io'n' arising from operation of the treating and related ismsesses.
  • fibsi fi findi mlcsntrat cns e 3 1 i isla tiyel ne ie tiv .Convelsli mages the concentrat on, ab ve 2.9 doesjnot" result in a significant I improvement alh eh fishfly higher ,cdnqelilf tien ay 3.2%, 21% ?4 l @@Yi%bc fo ti e u poseo increa ng ithei w ment is necessary. Instead of the dichromate im te v be or eplenishacid, if necessary. I have produced resistant films at various acidities between pH 2 and 11; however,
  • the action of the treatment in forming a protective film appears to be independent of tem-" perature at least in the range between room temperature and 180 F.
  • the method of my invention may be carried out most efficiently by drawing a continuous strip of tin-plate, such as that produced by known electrolytic tinning processes, through the solution described above and past electrodes immersed therein with respect to which the strip is first made a 'cathodeand then an anode.
  • the process may be convenientlypracticed by the aid of apparatus shown diagrammatically in the single figure of the accompanying drawing.
  • tinned steel strip is unwound from a coil and passed through a bath of the aforesaid solution contained in a tank ll provided with entry and exit guide rollers I2 and I3 and hold-down rollers l4. Spaced pairs of electrodes and iii are immersed in the bath, the electrodes of each pair being on opposite sides of the path of the strip.
  • a current source such as a generator lTis' soconne'cted to the strip and electrodes [5 as to make the portion of the strip between them the cathode.
  • a similar source H3 is so connected to the strip and electrodes I6 as to make the portion of the strip between them the anode.
  • connections to the strip are shown as made through rollers l2 and I3 which must therefore be conducting and insulated from the tank if it is also conducting but any other suitable forn'i-ofconnection to the strip may be used.
  • the strip After emerging from the solution in tank 1 I, the strip passes through'rinsing and drying apparatus indicated at 19 and 20, respectively, and is then wound-up by a 'recoiler 2! which exerts the tension necessary to pull the strip through the lineof processing apparatus.
  • the strip may be processed at speedsof several hundredfeet per minute, since the treatment requires only a very short time. Operating at 450 feet per minute, for example, with electrode 5' long, gives good results although the time of exposure of a given point on the strip to cathodizing is only .6 or .7 second and the same for anodizing.
  • the current density required for the cathode treatment will -vary with the degree of initial oxidation of tin surface, and with the allowable time interval, but 100 amperes per square foot is about the maximum needed, while a much lower density, such as 30 amperes, has been found satisfactory in some instances'
  • the thickness and characteristics of the films obtained will depend upon the anodizing process; that is, they are a function of the time and the current density. I have produced films by using anodic current densities ranging from one to 90 amperes per square foot. However, those formed witha current density greater than 30 amperes per square adherence of phenolic tin-plate lacquer.
  • Tin-plat processed according to my invention exhibits improved characteristics in several respects, in comparison with material treated by methods known previously. In the first place, it
  • My. improved method produces a uniform protective film which'may be easily controlled as to thickness.
  • Use of the phosphate radical produces a surface of pleasing appearance which is nontoxic, tasteless and odorless.
  • the process may be carried on at high speed in a continuous production line, since, the film formation requires only a second or less with suitable current density. Thecost is low because of the high speed which is practical'andthe cheapness of the salts employed; There is no factor in the control of the method which is unduly critical.
  • the process utilizes the electrical resistance of the protective film to insurefuniform and'complete coverage. That is to.
  • the invention is also applicable to the treatment of tinned sheets such as produced by the hot-dip'method of coating tinplate.

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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)
  • Chemical Treatment Of Metals (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
US56843A 1948-10-27 1948-10-27 Method of treating tin plate Expired - Lifetime US2606866A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE487191D BE487191A (US20110009641A1-20110113-C00185.png) 1948-10-27
US56843A US2606866A (en) 1948-10-27 1948-10-27 Method of treating tin plate
GB33657/48A GB651707A (en) 1948-10-27 1948-12-31 Method of treating tin-plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56843A US2606866A (en) 1948-10-27 1948-10-27 Method of treating tin plate

Publications (1)

Publication Number Publication Date
US2606866A true US2606866A (en) 1952-08-12

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US56843A Expired - Lifetime US2606866A (en) 1948-10-27 1948-10-27 Method of treating tin plate

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US (1) US2606866A (US20110009641A1-20110113-C00185.png)
BE (1) BE487191A (US20110009641A1-20110113-C00185.png)
GB (1) GB651707A (US20110009641A1-20110113-C00185.png)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2769774A (en) * 1952-08-05 1956-11-06 Republic Steel Corp Electrodeposition method
US2778791A (en) * 1953-07-20 1957-01-22 Detrex Corp Electrolytic method of cleaning containers
US2812296A (en) * 1953-06-16 1957-11-05 United States Steel Corp Electrochemical method for coating steel surfaces and the product thereof
US2820747A (en) * 1952-01-04 1958-01-21 Chicago Metallic Mfg Company Method for treating tin surfaces
US2893930A (en) * 1956-10-03 1959-07-07 Gen Lab Associates Inc Process of making a ceramic element usable in surface-gap igniters
US2920019A (en) * 1957-05-17 1960-01-05 Nat Steel Corp Electrolytic treatment of black plate and product
US2974091A (en) * 1958-12-11 1961-03-07 United States Steel Corp Method of reducing eye holing in lacquered tin-plate
US3034926A (en) * 1957-05-17 1962-05-15 United States Steel Corp Method of coating metal sheets with synthetic plastic
US3138548A (en) * 1961-04-11 1964-06-23 Inland Steel Co Tin plate treatment
US3216912A (en) * 1961-09-05 1965-11-09 United States Steel Corp Method of treating matte tin plate to prevent darkening
US3247086A (en) * 1961-05-25 1966-04-19 Crucible Steel Co America Method for enhancing corrosion resistance of stainless steels and products thereof
US3271284A (en) * 1963-10-29 1966-09-06 United States Steel Corp Method of treating galvanized sheet to inhibit staining
US3281341A (en) * 1963-04-18 1966-10-25 United States Steel Corp Method of improving solderability of tin plate
US3304245A (en) * 1964-08-20 1967-02-14 United States Steel Corp Method of making galvannealed ferrous metal of improved solderability
US3313714A (en) * 1964-11-16 1967-04-11 Inland Steel Co Tin plate treatment and product
US3410768A (en) * 1964-09-08 1968-11-12 Brush Beryllium Co Method of producing corrosion resistant beryllium bodies
US3907650A (en) * 1973-02-12 1975-09-23 Xerox Corp Photosensitive binder layer for xerography
US4273625A (en) * 1979-08-28 1981-06-16 U.S. Philips Corporation Method of treating objects the surface of which consists of tin
US4440607A (en) * 1981-01-26 1984-04-03 Kaiser Steel Corporation Method of producing tin plate for lithography with direct printed ultraviolet-cured inks
US4545871A (en) * 1982-05-06 1985-10-08 U.S. Philips Corporation Method of making an article having a layer of a nickel-phosphorus alloy and coated with a protective layer
US5372701A (en) * 1986-12-30 1994-12-13 Gerdon; Louis J. Process and apparatus for electroplating
US5547559A (en) * 1995-07-10 1996-08-20 Macdermid, Incorporated Process for plating metals onto various substrates in an adherent fashion
US20100181201A1 (en) * 2009-01-20 2010-07-22 Bibber John W Electrolytic passivated tin plated steel
US20100181203A1 (en) * 2009-01-20 2010-07-22 Bibber John W Electrolytic passivating of tin plated steel surfaces
WO2021180980A1 (en) * 2020-03-13 2021-09-16 Tata Steel Ijmuiden B.V. Method for passivating a tinplate strip and apparatus for producing said passivated tinplate strip

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56130487A (en) * 1980-03-18 1981-10-13 Toyo Kohan Co Ltd After-treatment for extra-thin tin-plated steel sheet for welding

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB416608A (en) * 1933-07-25 1934-09-18 John Campbell Improvements in or relating to the colouring of tin and tin alloys and articles madetherefrom applicable also to protecting same against corrosion
GB486752A (en) * 1936-11-09 1938-06-09 John Campbell Improved process for the treatment of tin and tin alloys and articles made therefrom or coated therewith to protect same against corrosion or chemical action
US2215165A (en) * 1936-06-06 1940-09-17 Crosse & Blackwell Ltd Process for treating tin-plate containers
US2312076A (en) * 1939-04-29 1943-02-23 Carnegie Illinois Steel Corp Method of treating tin
US2424718A (en) * 1942-08-17 1947-07-29 Continental Can Co Electrolytic treatment of tin plate for preventing sulphur staining
US2450509A (en) * 1945-09-12 1948-10-05 Crown Cork & Seal Co Tin plate treatment
US2503217A (en) * 1944-12-15 1950-04-04 Republic Steel Corp Process for treating brightened electrotinplate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB416608A (en) * 1933-07-25 1934-09-18 John Campbell Improvements in or relating to the colouring of tin and tin alloys and articles madetherefrom applicable also to protecting same against corrosion
US2215165A (en) * 1936-06-06 1940-09-17 Crosse & Blackwell Ltd Process for treating tin-plate containers
GB486752A (en) * 1936-11-09 1938-06-09 John Campbell Improved process for the treatment of tin and tin alloys and articles made therefrom or coated therewith to protect same against corrosion or chemical action
US2312076A (en) * 1939-04-29 1943-02-23 Carnegie Illinois Steel Corp Method of treating tin
US2424718A (en) * 1942-08-17 1947-07-29 Continental Can Co Electrolytic treatment of tin plate for preventing sulphur staining
US2503217A (en) * 1944-12-15 1950-04-04 Republic Steel Corp Process for treating brightened electrotinplate
US2450509A (en) * 1945-09-12 1948-10-05 Crown Cork & Seal Co Tin plate treatment

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820747A (en) * 1952-01-04 1958-01-21 Chicago Metallic Mfg Company Method for treating tin surfaces
US2769774A (en) * 1952-08-05 1956-11-06 Republic Steel Corp Electrodeposition method
US2812296A (en) * 1953-06-16 1957-11-05 United States Steel Corp Electrochemical method for coating steel surfaces and the product thereof
US2778791A (en) * 1953-07-20 1957-01-22 Detrex Corp Electrolytic method of cleaning containers
US2893930A (en) * 1956-10-03 1959-07-07 Gen Lab Associates Inc Process of making a ceramic element usable in surface-gap igniters
US2920019A (en) * 1957-05-17 1960-01-05 Nat Steel Corp Electrolytic treatment of black plate and product
US3034926A (en) * 1957-05-17 1962-05-15 United States Steel Corp Method of coating metal sheets with synthetic plastic
US2974091A (en) * 1958-12-11 1961-03-07 United States Steel Corp Method of reducing eye holing in lacquered tin-plate
US3138548A (en) * 1961-04-11 1964-06-23 Inland Steel Co Tin plate treatment
US3247086A (en) * 1961-05-25 1966-04-19 Crucible Steel Co America Method for enhancing corrosion resistance of stainless steels and products thereof
US3216912A (en) * 1961-09-05 1965-11-09 United States Steel Corp Method of treating matte tin plate to prevent darkening
US3281341A (en) * 1963-04-18 1966-10-25 United States Steel Corp Method of improving solderability of tin plate
US3271284A (en) * 1963-10-29 1966-09-06 United States Steel Corp Method of treating galvanized sheet to inhibit staining
US3304245A (en) * 1964-08-20 1967-02-14 United States Steel Corp Method of making galvannealed ferrous metal of improved solderability
US3410768A (en) * 1964-09-08 1968-11-12 Brush Beryllium Co Method of producing corrosion resistant beryllium bodies
US3313714A (en) * 1964-11-16 1967-04-11 Inland Steel Co Tin plate treatment and product
US3907650A (en) * 1973-02-12 1975-09-23 Xerox Corp Photosensitive binder layer for xerography
US4273625A (en) * 1979-08-28 1981-06-16 U.S. Philips Corporation Method of treating objects the surface of which consists of tin
US4440607A (en) * 1981-01-26 1984-04-03 Kaiser Steel Corporation Method of producing tin plate for lithography with direct printed ultraviolet-cured inks
US4545871A (en) * 1982-05-06 1985-10-08 U.S. Philips Corporation Method of making an article having a layer of a nickel-phosphorus alloy and coated with a protective layer
US5372701A (en) * 1986-12-30 1994-12-13 Gerdon; Louis J. Process and apparatus for electroplating
US5547559A (en) * 1995-07-10 1996-08-20 Macdermid, Incorporated Process for plating metals onto various substrates in an adherent fashion
US20100181201A1 (en) * 2009-01-20 2010-07-22 Bibber John W Electrolytic passivated tin plated steel
US20100181203A1 (en) * 2009-01-20 2010-07-22 Bibber John W Electrolytic passivating of tin plated steel surfaces
WO2021180980A1 (en) * 2020-03-13 2021-09-16 Tata Steel Ijmuiden B.V. Method for passivating a tinplate strip and apparatus for producing said passivated tinplate strip

Also Published As

Publication number Publication date
BE487191A (US20110009641A1-20110113-C00185.png)
GB651707A (en) 1951-04-04

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