Easy Detection, Repair and Removal of Corrosion from Aluminum Alloy Substrates

ABSTRACT: In this Phase I, MMI proposes an innovative technology using a combination of Acousto-Ultrasonics diagnostics and piezoelectric transducers to detect corrosion in advance. The electro-mechanical coupling allows direct interface with electronics used for sensing or actuation purposes. Using Acousto-Ultrasonics and in-situ piezoelectric transducers, atmospheric corrosion on a aluminum alloys and galvanic couples can be easily monitored. This approach will provide earlier detection to difficult-to-access areas in the aircrafts and improved ease of repair procedures or capability. For removal and cleaning of corrosion of galvanic couples, MMI will use innovative approaches to develop self-cleaning and healing anti-corrosion coatings for aluminum components and aircraft parts. The trigger-and-release approach from the nano-capsules present in the coating will be beneficial for optimized amount of materials released, hence will not increase the weight of the aircraft component. Characteristic features of the technology include: Transducer based guided wave diagnostics for early detection of corrosion Nanomaterial-based low VOC cleaning and anti-corrosion coatings New technology based on trigger-and-release self-cleaning and healing mechanism Coating can withstand harsh conditions (salinity, temperature, chemicals, 3 & #61603; pH & #61603; 14) Easy detection and application on site and not labor-intensive process BENEFIT: Early detection of corrosion in and around difficult-to-access zones in aircraft structures is essential to resist corrosion on galvanic and aluminum alloys. The worldwide cost of corrosion has been estimated to be nearly $300 billion per year. A quick, easy and precise identification system that can detect corrosion in advance has a great potential to eradicate corrosion for advanced engineering systems. The detection technology and remedy using the coating systems developed in this effort will provide solutions to structural (bridges, bunkers), automotive (cars), aviation and warfare applications in the US defense and military sectors. The anticipated benefits can be propelled for civilian and construction purposes.