Apparatus for and a method of electrochemically polishing pipe i

Details Apparatus for and a method of electrochemically polishing pipe i Apparatus for and a method of electrochemically polishing pipe i

1987-05-08

1988-09-20

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204224M, 2041297, 204225, 204272, C25B 302, C25D 1714

Patent

active

047723670

ABSTRACT:
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).

REFERENCES:
patent: 2764540 (1956-09-01), Farin et al.
patent: 3055812 (1962-09-01), Andersson
patent: 3202598 (1965-08-01), Covington et al.
patent: 3429787 (1969-02-01), Weinreich
patent: 4369101 (1983-01-01), Wolff et al.
patent: 4601802 (1986-07-01), Grimes et al.
patent: 4632740 (1986-12-01), Operschall et al.

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