EP 0127620 B1 19870923 - ELECTROLYTIC CODEPOSITION OF ZINC AND GRAPHITE AND RESULTING PRODUCT
Title (en)
ELECTROLYTIC CODEPOSITION OF ZINC AND GRAPHITE AND RESULTING PRODUCT
Publication
Application
Priority
US 8201689 W 19821201
Abstract (en)
[origin: WO8402149A1] A high lubricity codeposit of zinc and graphite, and an improved method for depositing the codeposit. The coating is characterized by a coefficient of friction equal to or less than .130, and a high resistance to corrosion evidenced by no red rust in a salt spray environment for 72 hours and no destruction due to corrosion in an industrial environment, containing sulphur dioxide, for four months. When the codeposit additionally has a chromate outer coating, the system has a coefficient of friction equal to or less than .112 and has no red rust in a salt spray environment for at least 120 hours. The codeposit is applied by immersing a cleansed metallic substrate in an acidic zinc plating electrolyte containing at least 40 g/l zinc ions and 30-110 g/l insoluble bulk graphite, with a pH of 5-5.7. The cell of which the electrolyte is a part is energized to plate out a codeposit; the graphite is continuously agitated while in solution, the agitation being periodically interrupted to allow the graphite to settle and saturate the zinc interface as it is plating out.
IPC 1-7
IPC 8 full level
F16B 33/06 (2006.01); C23C 22/24 (2006.01); C25D 5/48 (2006.01); C25D 15/02 (2006.01)
CPC (source: EP)
C23C 22/24 (2013.01); C25D 5/48 (2013.01); C25D 15/02 (2013.01)
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
WO 8402149 A1 19840607; BR 8208101 A 19841002; DE 3277378 D1 19871029; EP 0127620 A1 19841212; EP 0127620 A4 19850701; EP 0127620 B1 19870923; JP S59502108 A 19841220
DOCDB simple family (application)
US 8201689 W 19821201; BR 8208101 A 19821201; DE 3277378 T 19821201; EP 83900525 A 19821201; JP 50065883 A 19821201