System and method for electropolishing nonuniform pipes

Details System and method for electropolishing nonuniform pipes System and method for electropolishing nonuniform pipes

C - Chemistry, Metallurgy

25

F

C25F 3/16 (2006.01) B23H 9/00 (2006.01) C25F 7/00 (2006.01)

Patent

CA 2364460

A pipe electropolishing system (10, 10a) for in place polishing of a pipe (28) has provision for detecting the instant position of a cathode (14) within the pipe (28) such as cable marks (52) and cable mark sensor (50), an infrared camera (60), heat sensing crayon marks (64), thermisters (66), and capacitance sensors (68), used individually or in combination. According to the inventive in place electropolishing method (80) when it is determined that the cathode is in a nonuniform portion (70) of the pipe (28), then increased polishing action is provided as by increasing the voltage using a variable power supply (30a) and/or by slowing down the progress of the cathode (14) using a variable speed cable puller (18).

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