Session 11: Corrosion & Wear Deposit Coatings
This presentation will enlighten the audience on novel cold spray processes that provide properties similar to high velocity oxygen fuel (HVOF) or high velocity air fuel (HVAF) coatings. After attending this presentation, the audience will understand a simpler process that is easier to control, more efficient, and less expensive than conventional wear, corrosion resistant coating applications.
General Surface Finishing
Aerospace and Defense
Aircraft structure and components are commonly found with corrosion, wear, tooling, in-service damage in many areas across the aircraft requiring local damage clean-up or corrosion removal, and application of a wear coating and/or a Corrosion Preventative Compound (CPC) applications to prevent further corrosion. For these corrosion and wear repair scenarios, in some cases there are no practical repair methods to remove corrosion products and dimensionally restore these aircraft components in a relatively quick manner. Therefore, there is a need to develop a corrosion and / or wear resistant cold spray process that is portable and can provide quick corrosion removal and on-site dimensional restoration for depot and field level sites.
Cold spray is thermal spray process; however, unlike traditional thermal spray processes for wear resistant coating applications, the process operates at lower temperatures and the powder remains below the melting point and bonds by particle deformation due to the kinetic energy upon impact. The cold spray process is also much simpler and only uses helium, nitrogen, or compressed air as a carrier gas to accelerate the particles to the critical velocity required for bonding.
ES3 has developed cold spray repair processes to replace inadequate CPC applications and expensive and inefficient particle deposition legacy processes for the US Air Force, Navy and Army. The results have been exceptional and as a result of ES3’s groundbreaking research, various cold spray coatings, including chrome replacement, can be efficiently deposited, providing excellent wear and corrosion resistance.