Method and Device for In-Service Repair of Magnesium, Aluminum and High-Strength Steel

The Purpose of this proposal is to develop a portable process to repair precision aircraft components. Typically, they are composed of magnesium, aluminum, or high-strength steel base alloy, and may have a protective coating, such as cadmium or aluminum. These components damaged in the field must be removed from the aircraft to complete typical repairs. In addition, protective coatings, especially sacrificial coatings, have no viable, on-aircraft repair processes. Currently, Electroplated Hard Chromium (EHC) and Low Embrittlement Cadmium (LHE-Cd) are being used to repair worn and damaged components for a variety of applications. However, since it is a known carcinogen and produces waste that is detrimental to the environment, their use and disposal are strictly regulated. Demeton has extensive experience in repairs of high-strength steel, including 4340 alloy (260-280 ksi), with Demeton Detonation Spray Process (DDSP). Demeton, through past experience, has identified that DDSP is the best alternative to repair base alloys and protective coatings in order to restore material properties as close to original as possible with current requirements in the field. Since DDSP does not require high pressure gas or a special high pressure cooling system, the portability of the system is feasible for in-field repair works.