US3753871A - Multihardness electrodeposits - Google Patents

Multihardness electrodeposits Download PDF

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Publication number
US3753871A
US3753871A US00201360A US3753871DA US3753871A US 3753871 A US3753871 A US 3753871A US 00201360 A US00201360 A US 00201360A US 3753871D A US3753871D A US 3753871DA US 3753871 A US3753871 A US 3753871A
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United States
Prior art keywords
electrodeposit
activation
electrodeposition
zone
rate
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
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US00201360A
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English (en)
Inventor
S Eisner
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.)
Saint Gobain Abrasives Inc
Original Assignee
Norton Co
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Filing date
Publication date
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Publication of US3753871A publication Critical patent/US3753871A/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
    • C25D1/00—Electroforming
    • 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
    • C25D5/22—Electroplating combined with mechanical treatment during the deposition

Definitions

  • the present invention relates to the field of electrodeposition and, while useful in any electrodeposition process, is of particular utility in the fields of industrial plating and electroforming.
  • the activation can be carried out by loose particles which are vibrated over the surface of the electrodeposit as described and claimed in US. Pat. No. 3,699,014 or by moving an activator belt or disc or the like having the small particles affixed to its surface over the surface of the electrodeposit as described and claimed in US. Pat. No. 3,619,384.
  • the final 6 seconds of deposition were carried out at a slower deposition rate by dropping the current density to 500 amps per square foot while maintaining the same degree of activation (surface speed of the activator disc at 1,000 feet per minute and pressure against the deposit of 3 p.s.i.). While the portion of the deposit formed at this slower rate at the end of the deposition cycle was itself too thin to permit a direct hardness measurement,
  • Plating was carried out for 6 minutes at 2,100 cycles per minute and a /s" amplitude of vibration at a current density of 150 amps per square foot. The plating rate was then dropped by reducing the current density to 73 amps per square foot an additional run at 500 a.s.f. under the same degree of Example 2 Using the type of activation process described and claimed in U.S. Pat. No. 3,699,014, a nickel electrodeposit was laid down using a commercial /3 cu. ft. vibratory abrasive finishing machine (Vibratub Model 33) modified to contain two flat nickel anodes spaced two and plating continued for 13 minutes. The resulting plate had an initial layer of nickel on the substrate having a hardness of 198 Knoop and a thickness of 0.5 mil with an outer layer or skin of nickel approximately 0.5 mil thick and having a Knoop hardness value of 223.

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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)
  • Mechanical Engineering (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US00201360A 1971-11-23 1971-11-23 Multihardness electrodeposits Expired - Lifetime US3753871A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20136071A 1971-11-23 1971-11-23

Publications (1)

Publication Number Publication Date
US3753871A true US3753871A (en) 1973-08-21

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ID=22745524

Family Applications (1)

Application Number Title Priority Date Filing Date
US00201360A Expired - Lifetime US3753871A (en) 1971-11-23 1971-11-23 Multihardness electrodeposits

Country Status (5)

Country Link
US (1) US3753871A (ref)
JP (1) JPS4863931A (ref)
DE (1) DE2257322A1 (ref)
FR (1) FR2160944B3 (ref)
IT (1) IT975823B (ref)

Also Published As

Publication number Publication date
FR2160944A1 (ref) 1973-07-06
JPS4863931A (ref) 1973-09-05
DE2257322A1 (de) 1973-06-20
IT975823B (it) 1974-08-10
FR2160944B3 (ref) 1976-01-09

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