My 2 cents: - Al is a known neurotoxin - Al does not, typically, rust, despite being far more thermodynamically favorable than Fe because a kinetic barrier, A

My 2 cents: - Al is a known neurotoxin - Al does not, typically, rust, despite being far more thermodynamically favorable than Fe because a kinetic barrier, AlO2, forms stopping further oxidation - AlO2 is an extremely durable coating. Extremely inert. It's crystal lattice constant is similar to Al's to it does not flake - Al does rust in salty environments. Conclusion: The moka is fine. Just don't use vinegar or salt water to brew your coffee.