EP 0247209 B1 19900718 - APPARATUS AND PROCESS FOR ELECTROCHEMICALLY POLISHING THE INNER SURFACES OF PIPES
Title (en)
APPARATUS AND PROCESS FOR ELECTROCHEMICALLY POLISHING THE INNER SURFACES OF PIPES
Publication
Application
Priority
EP 86106812 A 19860520
Abstract (en)
[origin: US4772367A] An apparatus and a method serving for electrochemically polishing and/or pickling the inner surfaces (16) of pipes (10) provide for a polishing head (12) to be moved through the pipe. The polishing head (12) comprises a dielectric outer wall which defines a narrow working gap (28) together with the inner pipe surface (16) to be cleaned, the electrolyte flowing through said gap. This permits electrochemical polishing of high quality of the inside surface of the pipe with little consumption of electrolyte. The electrolyte stream may be divided into cathodic and anodic partial streams (30 and 32, respectively).
IPC 1-7
IPC 8 full level
C25F 1/04 (2006.01); C25F 3/16 (2006.01); C25F 7/00 (2006.01)
CPC (source: EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0247209 A1 19871202; EP 0247209 B1 19900718; AT E54681 T1 19900815; DE 3672831 D1 19900823; JP H0765240 B2 19950712; JP S62290899 A 19871217; US 4772367 A 19880920
DOCDB simple family (application)
EP 86106812 A 19860520; AT 86106812 T 19860520; DE 3672831 T 19860520; JP 12032387 A 19870519; US 4765387 A 19870508