US1942356A - Electrodeposition of chromium - Google Patents

Electrodeposition of chromium Download PDF

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Publication number
US1942356A
US1942356A US549800A US54980031A US1942356A US 1942356 A US1942356 A US 1942356A US 549800 A US549800 A US 549800A US 54980031 A US54980031 A US 54980031A US 1942356 A US1942356 A US 1942356A
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US
United States
Prior art keywords
chromium
electrodeposition
temperature
plated
application
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 - Lifetime
Application number
US549800A
Inventor
Colin G Fink
Charles H Eldridge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
United Chromium Inc
Original Assignee
United Chromium Inc
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
Application filed by United Chromium Inc filed Critical United Chromium Inc
Priority to US549800A priority Critical patent/US1942356A/en
Application granted granted Critical
Publication of US1942356A publication Critical patent/US1942356A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • This procedure permits chromium to be deposited over chromium, and minimizes the tendency for peeling and thereby resulting in good adherence.
  • the obtaining of platings of uniform appearance is aided in those cases where by reason of temperature differences between the article and bath, the temperature at the surface of the article would be such as to affect the character of the deposit, and the invention hence increases the satisfaction and economy in the electroplating process.

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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 And Plating Baths Therefor (AREA)

Description

Patented Jan. 2, 1934 1,942,356 j OFFICE 1,942,356 ELEGTRODEPOSITION 0F CHROMIUM Colin G. Fink, New York, N. Y., and Charles H.
Eldridge, Detroit, Mich assignments, to United Chromium,
rated, New York, N. ware No Drawing. Refile for In po- Y., a corporation of Dela.-
abandoned application Serial No. 734,193, August 26, 1924. This application July 9, 1931,
Serial No. 549,800. Re
newed October 25, 1933 1 Claim. (01. 204-1) This invention relates to the electroplating of at first; and then the current is gradually brought chromium, and provides improvements therein. The baths and method 01' plating may be made up and practiced according to U. S. Letters Patent No. 1,581,188 to We have discovered that in certain instances the type of plate desired is most readily obtained by having the surface of the object to be plated in any suitable manliquid at the proper be accomplished ner, as by immersion in a temperature.
The bringing of the surface of the object to be plated to the temperature of the up to its proper value. Without this precaution, after interruption of the plating, the brightness of the surface will be lowered, becoming bluish-gray or gray in color.
This procedure permits chromium to be deposited over chromium, and minimizes the tendency for peeling and thereby resulting in good adherence.
By the use-of the invention, the obtaining of platings of uniform appearance is aided in those cases where by reason of temperature differences between the article and bath, the temperature at the surface of the article would be such as to affect the character of the deposit, and the invention hence increases the satisfaction and economy in the electroplating process.
This application is a renewal Serial No. 734,193, filed August 26, 1924.
What is claimed is:
In a process of electrodepositing chromium, bringing the object to be plated to the temperature of the bath prior to beginning the electrodeposition.
COLIN G. FIN'K. CHARLES H. ELDRIDGE.
of our application, I
US549800A 1924-08-26 1931-07-09 Electrodeposition of chromium Expired - Lifetime US1942356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US549800A US1942356A (en) 1924-08-26 1931-07-09 Electrodeposition of chromium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US73419324A 1924-08-26 1924-08-26
US549800A US1942356A (en) 1924-08-26 1931-07-09 Electrodeposition of chromium

Publications (1)

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US1942356A true US1942356A (en) 1934-01-02

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US549800A Expired - Lifetime US1942356A (en) 1924-08-26 1931-07-09 Electrodeposition of chromium

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424144A (en) * 1943-11-08 1947-07-15 George C Bruen Card filing equipment
US2559926A (en) * 1947-02-04 1951-07-10 John C Schwartz Anode basket
US3136709A (en) * 1959-07-14 1964-06-09 Nat Steel Corp Method of electroplating an aluminum containing coating
US3396092A (en) * 1965-06-07 1968-08-06 United States Steel Corp Method of electroplating
US3627650A (en) * 1969-07-15 1971-12-14 Atomic Energy Commission Method for producing a chromium-tungsten coating on tungsten for protection against oxidation at elevated temperatures
US4416738A (en) * 1980-01-28 1983-11-22 The Boeing Company Chromium plating
US4731167A (en) * 1986-11-12 1988-03-15 M&T Chemicals Inc. Method of electroplating an adherent chromium electrodeposit on a chromium substrate
US4755263A (en) * 1986-09-17 1988-07-05 M&T Chemicals Inc. Process of electroplating an adherent chromium electrodeposit on a chromium substrate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424144A (en) * 1943-11-08 1947-07-15 George C Bruen Card filing equipment
US2559926A (en) * 1947-02-04 1951-07-10 John C Schwartz Anode basket
US3136709A (en) * 1959-07-14 1964-06-09 Nat Steel Corp Method of electroplating an aluminum containing coating
US3396092A (en) * 1965-06-07 1968-08-06 United States Steel Corp Method of electroplating
US3627650A (en) * 1969-07-15 1971-12-14 Atomic Energy Commission Method for producing a chromium-tungsten coating on tungsten for protection against oxidation at elevated temperatures
US4416738A (en) * 1980-01-28 1983-11-22 The Boeing Company Chromium plating
US4755263A (en) * 1986-09-17 1988-07-05 M&T Chemicals Inc. Process of electroplating an adherent chromium electrodeposit on a chromium substrate
US4731167A (en) * 1986-11-12 1988-03-15 M&T Chemicals Inc. Method of electroplating an adherent chromium electrodeposit on a chromium substrate

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