Elimination of film defects due to hydrogen evolution during cat

Details Elimination of film defects due to hydrogen evolution during cat Elimination of film defects due to hydrogen evolution during cat

1991-07-01

1993-04-27

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524260, C08K 532

Patent

active

052062775

ABSTRACT:
This invention is directed to a method for eliminating or reducing pinhole defects in cataphoretically deposited films without interfering with the electrolysis of water needed for electrodeposition. This method comprises decreasing the evolution of hydrogen gas at the cathode by adding a compound to the emulsion. This compound is reduced by the hydrogen produced at the cathode during the electrodeposition. The hydrogen reacts with the this non-gaseous compound rather than becoming hydrogen gas and forming bubbles which lead to pinhole defects.

REFERENCES:
patent: 3676383 (1972-07-01), Scala et al.
patent: 4108817 (1978-08-01), Lochel, Jr.
patent: 4877818 (1989-10-01), Emmons et al.

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