US2974091A - Method of reducing eye holing in lacquered tin-plate - Google Patents

Method of reducing eye holing in lacquered tin-plate Download PDF

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Publication number
US2974091A
US2974091A US779657A US77965758A US2974091A US 2974091 A US2974091 A US 2974091A US 779657 A US779657 A US 779657A US 77965758 A US77965758 A US 77965758A US 2974091 A US2974091 A US 2974091A
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US
United States
Prior art keywords
tin
plate
holing
chromium
coating
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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
Application number
US779657A
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English (en)
Inventor
Richard A Neish
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United States Steel Corp
Original Assignee
United States Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to NL246336D priority Critical patent/NL246336A/xx
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to US779657A priority patent/US2974091A/en
Priority to DEU6705A priority patent/DE1208149B/de
Priority to GB41157/59A priority patent/GB880188A/en
Application granted granted Critical
Publication of US2974091A publication Critical patent/US2974091A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment
    • 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
    • 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
    • C25D5/48—After-treatment of electroplated surfaces

Definitions

  • This invention relates to the treatment of tin plate to minimize or eliminate the tendency to eye-holing when lacquered.
  • lacquer i.e., a solution of a synthetic resin in an organic solvent. It sometimes happens that the lacquer-coating solution dewets or draws back from certain points, under surface tension, leaving bare spots known as eye holes. This tendency is particularly troublesome because it develops only sometime after tinning is completed and thus cannot be readily detected by the tin plate manufacturer.
  • my method consists in subjecting the plate briefly to the action of a reducing agent, after the usual chemical treatment following tinning, e.g., electrolysis as cathode in a solution containing hexavalent chromium.
  • a reducing agent e.g., electrolysis as cathode in a solution containing hexavalent chromium.
  • I may employ any convenient reducing agent but dilute solutions of citric acid or stannous chloride have been found to be particularly effective.
  • Tin plate in the form of continuous strip S is delivered from a conventional electrolytic plating line shown at wherein the steel strip is cleaned, pickled, plated with tin, heated to brighten the deposited tin coating and finally quenched by a water spray.
  • the strip On emerging from line 10, the strip is passed through a stabilizing bath 11 where it is subjected to treatment for the formation of a protective film containing chromium compounds as'by electrolysis in a solution containing hexavalent chromium preferably as disclosed in Patent No. 2,606,866.
  • the strip is next passed through a water rinse, such as bath 12.
  • the process so far as described above is conventional.
  • the stabilizing treatment efiected in bath 11 forms a protective chemical'coating on the tin surface deposited on the steel strip.
  • 1 subject the strip of tin plate withthe protective chemical coating formed thereon as described, to the action of a reducing agent before it is finally oiled and sheared or coiled.
  • a convenient way to effect this treatment is to pass the strip through a spray or bath 13 of, an acidic reducing solution, e.g a dilute aqueous solution of citric acid or stannous chloride.
  • the acidity of the bath e.g a dilute aqueous solution of citric acid or stannous chloride.
  • the acidity of the bath 'while not parof from 1 to 7, preferably about 3.
  • An acidic solution is desirable to prevent leaving on the tin plate traces of I alkali which are detrimental to lacquering.
  • the concentration of the solution may be from 0.2 to 1.0%, and
  • the time of immersion in the solution need be only instantaneous, i.e., from 0.2 to 1.0 sec., preferably about .5 sec. bath may be from 60 to 200 F., preferably about F.
  • the strip After passing through bath 13, the strip is passed through a drier 14 and then through a spray oiler 15, before being recoiled at 16. Squeegee rolls are preferably provided at the exit end of bath 13 to prevent excessive drag-out of the reducing solution.
  • the product made in accordance with my invention is remarkably free from eye holing tendency on lacquering, i.e., the dewetting tendency of the lacquer as applied.
  • the treatment descirbed also has the effect of materially improving the adherence of the lacquer under shockand' largely used in making containers for goods for human consumption.
  • a method of making tin plate which consists in electrodepositing .a coating of tin on a sheet-steel base, forming a protective film containing chromium com-' pounds and at least a residual amount of free hexavalent chromium over the tin coating and then treating the tin plate with an aqueous solution containing from .2 to 1% of a reducing agent effective to reduce any free hexavalent chromium thereon to trivalent chromium.
  • a method of making tin plate comprising electrodepositing a layer of tin on sheet steel, heating the, tin plate to refiow the tin, cooling-the tin plate, making the plate cathode in an acid solution containing from .2 to 3% of a chromate of an alkali metal and having a pH value of from 2 to 7, thereby at least partially reducing the oxide film initially existing on the plate, and immediately thereafter making the plate anode while still in said with an aqueous solution containing 0.2 to 1.0% of a compound selected from the group consisting ofstannous chloride and citric acid, drying and oiling thetin plate, thereby reducing the tendency to eye holing on lacquerin'g.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Chemical Treatment Of Metals (AREA)
US779657A 1958-12-11 1958-12-11 Method of reducing eye holing in lacquered tin-plate Expired - Lifetime US2974091A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL246336D NL246336A (no) 1958-12-11
US779657A US2974091A (en) 1958-12-11 1958-12-11 Method of reducing eye holing in lacquered tin-plate
DEU6705A DE1208149B (de) 1958-12-11 1959-12-02 Verfahren zur Nachbehandlung eines Schutz-filmes auf mit Zinn ueberzogenem Stahl
GB41157/59A GB880188A (en) 1958-12-11 1959-12-03 Method of reducing eye holing in lacquered tin-plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US779657A US2974091A (en) 1958-12-11 1958-12-11 Method of reducing eye holing in lacquered tin-plate

Publications (1)

Publication Number Publication Date
US2974091A true US2974091A (en) 1961-03-07

Family

ID=25117098

Family Applications (1)

Application Number Title Priority Date Filing Date
US779657A Expired - Lifetime US2974091A (en) 1958-12-11 1958-12-11 Method of reducing eye holing in lacquered tin-plate

Country Status (4)

Country Link
US (1) US2974091A (no)
DE (1) DE1208149B (no)
GB (1) GB880188A (no)
NL (1) NL246336A (no)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138548A (en) * 1961-04-11 1964-06-23 Inland Steel Co Tin plate treatment
US3160481A (en) * 1962-02-05 1964-12-08 United States Steel Corp Mate tin plate
US3216912A (en) * 1961-09-05 1965-11-09 United States Steel Corp Method of treating matte tin plate to prevent darkening
US3313714A (en) * 1964-11-16 1967-04-11 Inland Steel Co Tin plate treatment and product
US3346522A (en) * 1963-05-23 1967-10-10 Pennsalt Chemicals Corp Aqueous solution containing a resin and sucrose for use with solutions of hexavalentchromium coating compounds
US3356538A (en) * 1964-09-29 1967-12-05 Gen Electric Electrodeposited ion exchange membrane and method of forming
US3491001A (en) * 1966-10-31 1970-01-20 Canada Steel Co Electro-chemical passivation of tinplate
US4113580A (en) * 1976-08-18 1978-09-12 Toyo Kohan Co., Ltd. Steel sheet useful in forming foodstuff and beverage cans
US4440607A (en) * 1981-01-26 1984-04-03 Kaiser Steel Corporation Method of producing tin plate for lithography with direct printed ultraviolet-cured inks
EP0562418A1 (en) * 1992-03-23 1993-09-29 Nkk Corporation Method for manufacturing tin-electroplated cold-rolled steel strip
US6174426B1 (en) 1999-08-12 2001-01-16 Usx Corporation Tin-plated steel with adhesion promoter
EP1767665A2 (de) * 2005-09-21 2007-03-28 Rasselstein GmbH Verfahren zur Passivierung der Oberflächen von beschichteten Metallbändern und Vorrichtung für das Aufbringen der Passivschicht auf ein metallisch beschichtetes Stahlband

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5011711A (en) * 1989-07-18 1991-04-30 Toyo Kohan Co., Ltd. Method for post-treatment of electroplated steel sheets for soldering

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2606866A (en) * 1948-10-27 1952-08-12 United States Steel Corp Method of treating tin plate
US2812296A (en) * 1953-06-16 1957-11-05 United States Steel Corp Electrochemical method for coating steel surfaces and the product thereof
US2833703A (en) * 1957-11-13 1958-05-06 Macdermid Inc Removal of chromium from plating baths and electroplating process

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2393663A (en) * 1943-03-22 1946-01-29 Rheem Res Products Inc Coating for cadmium and zinc
US2559812A (en) * 1949-01-25 1951-07-10 Tennessee Coal Iron And Railro Solution and method for coating zinc surfaces
GB762104A (en) * 1953-03-07 1956-11-21 Poor & Co Corrosion protecting metal finishing composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2606866A (en) * 1948-10-27 1952-08-12 United States Steel Corp Method of treating tin plate
US2812296A (en) * 1953-06-16 1957-11-05 United States Steel Corp Electrochemical method for coating steel surfaces and the product thereof
US2833703A (en) * 1957-11-13 1958-05-06 Macdermid Inc Removal of chromium from plating baths and electroplating process

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3160481A (en) * 1962-02-05 1964-12-08 United States Steel Corp Mate tin plate
US3346522A (en) * 1963-05-23 1967-10-10 Pennsalt Chemicals Corp Aqueous solution containing a resin and sucrose for use with solutions of hexavalentchromium coating compounds
US3356538A (en) * 1964-09-29 1967-12-05 Gen Electric Electrodeposited ion exchange membrane and method of forming
US3313714A (en) * 1964-11-16 1967-04-11 Inland Steel Co Tin plate treatment and product
US3491001A (en) * 1966-10-31 1970-01-20 Canada Steel Co Electro-chemical passivation of tinplate
US4113580A (en) * 1976-08-18 1978-09-12 Toyo Kohan Co., Ltd. Steel sheet useful in forming foodstuff and beverage cans
US4440607A (en) * 1981-01-26 1984-04-03 Kaiser Steel Corporation Method of producing tin plate for lithography with direct printed ultraviolet-cured inks
EP0562418A1 (en) * 1992-03-23 1993-09-29 Nkk Corporation Method for manufacturing tin-electroplated cold-rolled steel strip
US5275716A (en) * 1992-03-23 1994-01-04 Nkk Corporation Method for manufacturing tin-electroplated cold-rolled steel strip
US6174426B1 (en) 1999-08-12 2001-01-16 Usx Corporation Tin-plated steel with adhesion promoter
EP1767665A2 (de) * 2005-09-21 2007-03-28 Rasselstein GmbH Verfahren zur Passivierung der Oberflächen von beschichteten Metallbändern und Vorrichtung für das Aufbringen der Passivschicht auf ein metallisch beschichtetes Stahlband
EP1767665A3 (de) * 2005-09-21 2008-07-16 Rasselstein GmbH Verfahren zur Passivierung der Oberflächen von beschichteten Metallbändern und Vorrichtung für das Aufbringen der Passivschicht auf ein metallisch beschichtetes Stahlband

Also Published As

Publication number Publication date
GB880188A (en) 1961-10-18
NL246336A (no)
DE1208149B (de) 1965-12-30

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