EP 0251080 A3 19890705 - PROCESS FOR METALLISING METALLIC ARTICLES BY MECHANICAL-CHEMICAL TREATMENT
Title (en)
PROCESS FOR METALLISING METALLIC ARTICLES BY MECHANICAL-CHEMICAL TREATMENT
Publication
Application
Priority
- DE 3620586 A 19860619
- EP 87105921 A 19870423
Abstract (en)
[origin: EP0251080A2] The articles are treated in a bath containing inert impingement bodies, by generating a relative motion between articles and impingement bodies or the bath, a promoter and the metal forming the coating being added to the bath and, in order to prevent dissolution of metals and hence evolution of hydrogen, acid being added at the latest before and/or during the addition of the metal forming the coating, using at least one water-soluble organic carboxylic acid or using a combination of at least one water-soluble organic carboxylic acid and/or salts thereof with at least one mineral acid, in such a quantity that the pH of the bath at the start of the application of metal is approximately in the range greater than 2.5-4.5 and, at the end thereof, is approximately in the range from 3 to 7.
IPC 1-7
IPC 8 full level
C23C 18/16 (2006.01); C23C 24/04 (2006.01)
CPC (source: EP)
C23C 18/1683 (2013.01)
Citation (search report)
[XD] DE 1771816 A1 19720203 - MINNESOTA MINING & MFG
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0251080 A2 19880107; EP 0251080 A3 19890705; DK 314687 A 19871220; DK 314687 D0 19870619; FI 872700 A0 19870617; FI 872700 A 19871220; NO 872562 D0 19870618; NO 872562 L 19871221
DOCDB simple family (application)
EP 87108839 A 19870619; DK 314687 A 19870619; FI 872700 A 19870617; NO 872562 A 19870618