Give examples to show that plastics are noncorrosive in nature

Give examples to show that plastics are noncorrosive in nature.
A .
i) Buckets made of iron get rusted but those made of plastic are not rusted.
(ii) Food can be stored in plastic containers, as they are resistant to chemicals in the food
(iii) Teflon coated pans are used instead of metallic as it doesnot react with chemicals in the food.