EP 0147484 B1 19891213 - A PROCESS FOR OBTAINING A PROTECTIVE COATING FOR SURFACES SUBJECTED TO MECHANICAL AND THERMAL WEAR, AND COATING OBTAINED BY SUCH PROCESS
Title (en)
A PROCESS FOR OBTAINING A PROTECTIVE COATING FOR SURFACES SUBJECTED TO MECHANICAL AND THERMAL WEAR, AND COATING OBTAINED BY SUCH PROCESS
Publication
Application
Priority
EP 83113249 A 19831230
Abstract (en)
[origin: EP0147484A1] The process provides for coating surfaces (2) of elements (1) of heat engines subjected to wear by sliding and oxidation with a wear layer (3), and consists of a first electro-deposition phase performed in an aqueous electrolyte with a low hydrogen discharge, of a first layer (4) of hard chrome having a thickness lying between 20 and 40 mu m and a hardness lying between 400 and 600 HV; and a second electro-deposition phase in an aqueous electrolyte based on a mixture of acids, of a second layer (5) of hard chrome over the first layer (4), having a hardness of at least 1000 HV and a maximum thickness of about 1.2 mm.
IPC 1-7
IPC 8 full level
C25D 5/14 (2006.01); F02B 77/02 (2006.01)
CPC (source: EP US)
C25D 5/14 (2013.01 - EP US); C25D 5/617 (2020.08 - EP US); C25D 5/623 (2020.08 - EP US); C25D 5/625 (2020.08 - EP US); F02B 77/02 (2013.01 - EP); F05C 2201/0406 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE FR GB LI LU NL SE
DOCDB simple family (publication)
EP 0147484 A1 19850710; EP 0147484 B1 19891213; AT E48659 T1 19891215; DE 3380965 D1 19900118
DOCDB simple family (application)
EP 83113249 A 19831230; AT 83113249 T 19831230; DE 3380965 T 19831230