US2462615A - Method of chromium plating and treating steel airplane propeller blades - Google Patents

Method of chromium plating and treating steel airplane propeller blades Download PDF

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Publication number
US2462615A
US2462615A US578552A US57855245A US2462615A US 2462615 A US2462615 A US 2462615A US 578552 A US578552 A US 578552A US 57855245 A US57855245 A US 57855245A US 2462615 A US2462615 A US 2462615A
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US
United States
Prior art keywords
chromium
steel
propeller blades
chromium plating
treating steel
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
US578552A
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English (en)
Inventor
Dubpernell George
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
Priority to DENDAT2462615 priority Critical patent/DE2462615A1/de
Application filed by United Chromium Inc filed Critical United Chromium Inc
Priority to US578552A priority patent/US2462615A/en
Priority to DEP29755D priority patent/DE841095C/de
Application granted granted Critical
Publication of US2462615A publication Critical patent/US2462615A/en
Anticipated expiration legal-status Critical
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
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/04—Electroplating: Baths therefor from solutions of chromium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49332—Propeller making

Definitions

  • the concentratrodeposited by usual methods produces a high tion of the chromic acid is a. contributing factor loss of the fatigue strength of metals on which to the result sought, the benefit increasing with it is deposited. It has not been possible to proit increase of concentration from a minimum convide with a chromium plate many metal articles e t a o o about 500 n the basis of which are subjected to stresses and strains in use pr ent knowl e, a n en i n of 6 g-/1- which approach the fatigue limit of the unplated hr i ci is onsi p m f use in article. A notable example is a hollow steel aeropractical operation.
  • Concentrations of 800 'g/ p1anepr pe11e can also be used. Current densities from 1 to 4 The desirability of chromium plate on steel amperes p r sq a i ve en used. a aeroplane propellers has been well recognized p atu es ghe t an 104 F. (40 C.) should d h i plated steel propellers were put not be used. The lowest temperature which can into use. After numerous accidents due to the be maintained in a plant in Summer With natural failure of such chromium plated propellers (a cocling Water, fo ample, 86 F. (30 C.),is recfrequent occurrence was the breakage of the pro- Ommehded Practical 1156.
  • pellers are used to inhibit erosion and corrosion.
  • chromium is electrodeposi ed accord to Immersion in hot oxidizing caustic solutions is a the Present invention 0h metals which are stressth commonly used for providing Such acoat relieved, no cracks after the aforementioned ing
  • the superiority of chromium plate as a heat treatment are found in the chromium plate. protective coating is well recognized. Since the Such a chromium plate is unique NO chromium i prohibition of it use fo Such purpose much efelectrodeposit without cracks after comparable fort has b made t find a way of using heat treatment was heretofore known.
  • the present invention comprises m th d f i erosion, that substantial thicknesses of chromium electrodepositing chromium on metals by which be obtained with s riously red in the the fatigue or endurance limit of th metal on fatigue or endurance limit of the metal on which which the chromium is electrodeposited is not th chr mium is l ct d p sit According to seriously affected by the chromium electrodeposit e P se t nve t on such a result s attained.
  • Tests show that similar steel coated with .001 of an inch chromium electrodeposited under ordinary plating conditions, shows a loss in fatigue strength of 65%. Heat-treating such chromium electrodeposits does not overcome this.
  • a chromium plating bath having the composition 600 g./l. chromic acid (C103) and 3.24 g./l. sulphate catalyst acid radical (S04) ratio l85to 1. The ratio is closely maintained during operation.
  • the coated propeller is then removed, rinsed, dried, and placed in an ordinary oven and heated to 500 F. for three hours. After cooling, ordinarily a coating of paint is applied over the electrodeposit. Wax and oil may be applied to the surface in service.

Landscapes

  • 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)
US578552A 1945-02-17 1945-02-17 Method of chromium plating and treating steel airplane propeller blades Expired - Lifetime US2462615A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DENDAT2462615 DE2462615A1 (enrdf_load_stackoverflow) 1945-02-17
US578552A US2462615A (en) 1945-02-17 1945-02-17 Method of chromium plating and treating steel airplane propeller blades
DEP29755D DE841095C (de) 1945-02-17 1949-01-01 Verfahren zur elektrolytischen Abscheidung von Chromueberzuegen, die die Ermuedungsfestigkeit der mit diesen UEberzuegen ueberzogenen Metalle nicht wesentlich herabsetzen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US578552A US2462615A (en) 1945-02-17 1945-02-17 Method of chromium plating and treating steel airplane propeller blades

Publications (1)

Publication Number Publication Date
US2462615A true US2462615A (en) 1949-02-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US578552A Expired - Lifetime US2462615A (en) 1945-02-17 1945-02-17 Method of chromium plating and treating steel airplane propeller blades

Country Status (2)

Country Link
US (1) US2462615A (enrdf_load_stackoverflow)
DE (2) DE841095C (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2637686A (en) * 1949-04-02 1953-05-05 Int Nickel Co Process of producing drawn articles
US2658742A (en) * 1950-01-09 1953-11-10 Harold R Suter Catalytic fume incineration
US2732020A (en) * 1956-01-24 Electroplated structure adapted for -
DE1044553B (de) * 1956-02-24 1958-11-20 Dansk Ind Syndikat Cie Anwendung der thermischen Nachbehandlung hartverchromter Teile
US20100139352A1 (en) * 2008-03-28 2010-06-10 Sumitomo Metal Industries, Ltd. Method for cr-plating of mandrel bars, the mandrel bar, and process for producing seamless tubes using the method and the mandrel bar

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009881B (de) * 1954-12-02 1957-06-06 William Donald Maclean Verfahren und Bad zum Verchromen von Aluminium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329735A (en) * 1918-04-03 1920-02-03 Cyrus F Wicker Aeroplane-propeller blade
US1581188A (en) * 1925-12-19 1926-04-20 Chemical Treament Company Inc Process of electrodepositing chromium and of preparing baths therefor
US1802463A (en) * 1925-09-19 1931-04-28 Chemical Treat Company Inc Process of producing chromium-plated articles with mirrorlike, scratchfinish, or the like surfaces
US1963391A (en) * 1930-11-10 1934-06-19 Gen Motors Res Corp Electroplating method
US2172344A (en) * 1936-09-11 1939-09-12 Western Electric Co Method of chromium plating

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329735A (en) * 1918-04-03 1920-02-03 Cyrus F Wicker Aeroplane-propeller blade
US1802463A (en) * 1925-09-19 1931-04-28 Chemical Treat Company Inc Process of producing chromium-plated articles with mirrorlike, scratchfinish, or the like surfaces
US1581188A (en) * 1925-12-19 1926-04-20 Chemical Treament Company Inc Process of electrodepositing chromium and of preparing baths therefor
US1963391A (en) * 1930-11-10 1934-06-19 Gen Motors Res Corp Electroplating method
US2172344A (en) * 1936-09-11 1939-09-12 Western Electric Co Method of chromium plating

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732020A (en) * 1956-01-24 Electroplated structure adapted for -
US2637686A (en) * 1949-04-02 1953-05-05 Int Nickel Co Process of producing drawn articles
US2658742A (en) * 1950-01-09 1953-11-10 Harold R Suter Catalytic fume incineration
DE1044553B (de) * 1956-02-24 1958-11-20 Dansk Ind Syndikat Cie Anwendung der thermischen Nachbehandlung hartverchromter Teile
US20100139352A1 (en) * 2008-03-28 2010-06-10 Sumitomo Metal Industries, Ltd. Method for cr-plating of mandrel bars, the mandrel bar, and process for producing seamless tubes using the method and the mandrel bar
US7814771B2 (en) * 2008-03-28 2010-10-19 Sumitomo Metal Industries, Ltd. Method for Cr-plating of mandrel bars, the mandrel bar, and process for producing seamless tubes using the method and the mandrel bar

Also Published As

Publication number Publication date
DE2462615A1 (enrdf_load_stackoverflow)
DE841095C (de) 1952-06-13

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