|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Environmental Degradation of Additively Manufactured Alloys
||The Effects of Solution Chemistry on the Corrosion Behavior of Cold Sprayed AA7075
||Ozymandias Agar, Nicholas D’Attilio, Luke Brewer
|On-Site Speaker (Planned)
This presentation will describe how changes in solution pH and salinity affect the corrosion behavior of cold sprayed AA7075 materials. Cold spray is being developed to repair corrosion damage on aircraft structures, but the corrosion behavior of the deposited material is still under investigation. Samples of aluminum alloy 7075 were cold sprayed using helium gas onto wrought 7075-T651 substrates. Potentiodynamic testing was done in a variety of artificial seawaters modified from ASTM D1141 with pH ranges from 6.2 to 9.6. The chloride concentrations were varied from 0.3-0.9 molar. Potentiodynamic testing was performed in accordance with MIL-STD 889C with highly consistent results. Quiescent immersion testing with the same solutions is underway to examine pitting behavior. The polarization behavior of the cold sprayed material roughly matched that of wrought AA7075-T651 over the range of pH values tested. The cold sprayed materials tested thus far have outperformed wrought material in terms of pitting.
||Planned: Supplemental Proceedings volume