Aircraft Corrosion Study
BATTELLE COLUMBUS DIV OH
Pagination or Media Count:
A comparison of the test results obtained for the unaged French and 2024-T3 bare and hard anodized alloys suggests that the resistance of all materials to raindrop erosion is identical. Superior performance of the hard anodized Alloy 2024-T3 sample was not observed during the erosion testing. Post- test examinations of the hard anodized 2024-T3 sample indicate that the performance of the coating was limited by spalling of the coating from the substrate. A review of the literature suggests that this condition is due to abnormal surface roughness of the anodic coating. This condition, which can be minimized with the application of silicone waxes or similar surface treatments to the coated surfaces, does contribute to poor chemical and impact resistance. No pretest surface characterizations were performed on this material. In summary, the results of this program suggest that Alloy 2024-T3 be considered as a candidate replacement material for the French alloy that is currently being used on the outer wing slats of the HU-25A aircraft. Aircraft corrosion, Outer wing slat.
- Properties of Metals and Alloys