It's an internal project based on Rust, not a product. So I don't think it matters too much what they name it. It's opens source which is great, but still not a product that they need to market.
I take your point but corrosion-resistant metals such as Aluminum, Titanium, Weathering Steel and Stainless Steel don’t avoid corrosion entirely but form a thin and extremely stable corrosion layer (under the right conditions).