Global Patent Index - EP 0147484 A1

EP 0147484 A1 19850710 - 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.

Title (de)

Verfahren zur Herstellung einer Schutzschicht für Oberflächen die mechanischem und thermischem Verschleiss unterworfen sind.

Title (fr)

Procédé pour obtenir un revêtement protecteur pour des surfaces soumises à l'usure mécanique et thermique et revêtement obtenu par le procédé.

Publication

EP 0147484 A1 19850710 (EN)

Application

EP 83113249 A 19831230

Priority

EP 83113249 A 19831230

Abstract (en)

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

C25D 5/14

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)

Citation (search report)

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