Study on the Restoration of Aluminum Aerospace IVD Coatings Using Cold Gas Dynamic Spray

Ion vapor deposition is a physical vapor deposition process often used to apply pure aluminum coatings to aerospace parts for corrosion protection. These coatings, however, are vulnerable to damage during manufacturing and use, leaving the underlying material susceptible to corrosion. The aim of this study is to develop an economical and practical technique for the repair and restoration of damaged aluminum IVD coatings using available cold gas dynamic spraying equipment. Based on the porosity, surface finish, adhesion strength, and corrosion performance of the repair coatings, cold gas spraying is shown to be a strong candidate for restoring damaged aluminum coatings on aerospace parts.