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Technology Factsheet

Electrostrip

Category: Decontamination > Chemical Surface Cleaning > Electrochemical Treatment
Reference # : Model No : Electrostrip

The ElectroStrip process is designed to remove paint from steel structures. Debonding of the coating is achieved by applying a cathodic current to a painted metal substrate. The environmentally benign electrolyte is contained in a liquid-absorbent material to which a counter electrode is attached. This combination, often with a liner, is applied to the painted metal surface, in the case of steel, with magnets. To initiate current flow, a surface not sufficiently deteriorated needs to be scored. After electrochemical treatment for « to 2 hours at a safe voltage of 8 to 10 V, the ElectroPad is removed, and paint fragments are recovered. Banks of ElectroPads may cover an area up to 150 square feet and can be run simultaneously. Pads can accommodate various sizes and geometries (e.g., rounded surfaces). Dimensions of Tech Model (LxWxH): 4000 A rectifier: 33 in. x 35 in. x 82 in. (can be taken off trailer), 16 ft. x 7 ft. x 104 ft. (with trailer); Bus bar system: 1 in. x 12 in. x 10 ft. aluminum sections, number depending on objects and locations. Weight of Tech Model (Lb.): Approximately 6000 lbs including rectifier, trailer, bus bars, and equipment.

Benefits

No airborne particles generated. Low noise level. No aggressive chemicals used. Little strenuous work. Modest equipment needs.

Limitations

The technology is rather effective on flat surfaces with paint responding to the localized alkaline condition created. It is less effective on irregular shaped surfaces. Epoxy paint removal demonstration displayed inconsistent results (paint was completely removed from 1 of the 6 plates). Optimum operation parameters need to be redefined. The technology generates wastewater during the final wash-off. Operators directly contact contaminated surfaces when scoring the coated surfaces.

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