Electrochemical machining with avoidance of erosion

Details Electrochemical machining with avoidance of erosion Electrochemical machining with avoidance of erosion

1989-02-13

1991-03-05

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412975, 204290R, 204290F, 428469, B23H 306

Patent

active

049975340

ABSTRACT:
Metal workpieces for electrochemical machining, particularly those comprising titanium and/or aluminum, are protected from pitting by the application of an adherent conductive and protective coating comprising a compound of at least one noble metal selected from the group consisting of ruthenium, rhodium, palladium, iridium and platinum. Said coating protects the workpiece and also catalyzes oxidation of halide and/or water in the electrolyte, which competes successfully with oxidative erosion in the vicinity of faults in the protective coating. Other anodic elements, including clamping fixtures and auxiliary anodes, may also be coated.

REFERENCES:
patent: 3668005 (1972-06-01), Sluse et al.
patent: 3697401 (1972-10-01), Lucas et al.
patent: 4415905 (1983-11-01), Mitchell et al.
patent: 4589969 (1986-05-01), Yurkov et al.
patent: 4879013 (1989-11-01), Austin
patent: 4913973 (1990-04-01), Geusic

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