Abstract: A process for the delacquering and detinning of a metal substrate is presented comprising the fully electrochemical removal of both an outer polymeric coating and an inner tin coating from a metal substrate. The disclosed method provides a clean metal substrate, and results in wastes which are easily disposed of with minimal cost and minimal environmental impact. In one embodiment, the present invention comprises a one-stage process for removing an outer polymeric coating and an inner tin coating from a metal substrate in a single electrolyte bath through electrolytic removal of both the polymeric and tin layers from the metal substrate. An electrically conductive container having the electrolyte bath therein acts as an anode in the process, and the removed tin is plated out on the cathode. In another embodiment, the present invention comprises a two-stage process for removing an outer polymeric coating and an inner tin coating from a metal substrate.

Abstract: A process and apparatus is disclosed for treating titanium machining scrap to remove both magnetic and non-magnetic high density inclusions, particularly bits or pieces of tungsten carbide broken from the cutting tool or tools associated with the scrap. In the process and apparatus a major portion of the undesired high density inclusions are removed by the novel use of an air separator, particularly one having an inclined, vibrating, air-conducting deck onto which the work product is fed and through which an upward current of air is blown. One or more magnetic separators are also used in advance of a final x-ray inspection station. The overall efficiency of the process and apparatus is such that a high percentage of initial input material is converted to high quality material passing the x-ray inspection and suitable for use in making rotating aircraft parts or other parts subjected to severe service demands.