JPS57114683A - External part for portable watch and its production - Google Patents

External part for portable watch and its production

Info

Publication number
JPS57114683A
JPS57114683A JP18809580A JP18809580A JPS57114683A JP S57114683 A JPS57114683 A JP S57114683A JP 18809580 A JP18809580 A JP 18809580A JP 18809580 A JP18809580 A JP 18809580A JP S57114683 A JPS57114683 A JP S57114683A
Authority
JP
Japan
Prior art keywords
powder
soln
plating layer
plating
thence
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.)
Granted
Application number
JP18809580A
Other languages
Japanese (ja)
Other versions
JPS642194B2 (en
Inventor
Takeshi Ito
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP18809580A priority Critical patent/JPS57114683A/en
Publication of JPS57114683A publication Critical patent/JPS57114683A/en
Publication of JPS642194B2 publication Critical patent/JPS642194B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

PURPOSE: To improve the abrasion resistance of external parts, lower the coefft. of friction of sliding parts and improve the durability and quality by forming a surface layer of a fluorohydrocarbon polymer on the top surface of a porous hard chrome plating layer of parts surfaces.
CONSTITUTION: A case band 1 obtained from brass by pressing, cutting and polishing is degreased, after which it is etched by immersion in an NaCN soln., rinsing and neutralizing with an aq. sulfuric acid soln. to etch, thence, it is applied with chrome plating with an ordinary method, whereby a plating layer of about 860 Vickers hardness and about 50μ thickness is formed. Next, reverse electrolytic etching is accomplished for about 2min in this plating soln. so that fine cracks are produced on the chrome plated surface. Thence, after the neutralization treatment, it is heat-treated for about 1hr at 200°C, after which it is quickly immersed in tetrafluoropolyethylene powder of ≤2μ powder sizes precooled to -70°C. After the part restores room temp., it is removed from the powder, and the excess powder stuck thereon is dislodged. The tetrafluropolyethylene is interference-fitted into the cracks of the plating layer, thereby forming a firm film.
COPYRIGHT: (C)1982,JPO&Japio
JP18809580A 1980-12-29 1980-12-29 External part for portable watch and its production Granted JPS57114683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18809580A JPS57114683A (en) 1980-12-29 1980-12-29 External part for portable watch and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18809580A JPS57114683A (en) 1980-12-29 1980-12-29 External part for portable watch and its production

Publications (2)

Publication Number Publication Date
JPS57114683A true JPS57114683A (en) 1982-07-16
JPS642194B2 JPS642194B2 (en) 1989-01-13

Family

ID=16217606

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18809580A Granted JPS57114683A (en) 1980-12-29 1980-12-29 External part for portable watch and its production

Country Status (1)

Country Link
JP (1) JPS57114683A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950563A (en) * 1988-12-27 1990-08-21 International Fuel Cells Phosphoric acid fuel cells with improved corrosion resistance
WO2011105392A1 (en) * 2010-02-23 2011-09-01 太陽化学工業株式会社 Multilayer film laminate using aluminum or aluminum alloy as substrate, and lamination method therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950563A (en) * 1988-12-27 1990-08-21 International Fuel Cells Phosphoric acid fuel cells with improved corrosion resistance
WO2011105392A1 (en) * 2010-02-23 2011-09-01 太陽化学工業株式会社 Multilayer film laminate using aluminum or aluminum alloy as substrate, and lamination method therefor

Also Published As

Publication number Publication date
JPS642194B2 (en) 1989-01-13

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