The upper-stage helium tank of the Ariane 3 that was launched in 1985 was recovered in Uganda in 2002 after re-entry. Molten aluminum splashes were discovered on the tank, which have been identified as deposits from local fixings.
Simulating ejecta on titanium spacecraft surfaces under re-entry extreme environment conditions retrieved 3 April 2024 from https://phys.org/news/2024-04-simulating-ejecta-titanium-spacecraft-surfaces.html
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