1018 / A36 has a moderate corrosion resistance as it does not contain enough of the alloying elements to promote full corrosion resistance.1018 / A36 is susceptible to pitting and crevice corrosion in acids and chloride rich environments as well as intergranular corrosion when exposed to high temperature over a longer time.Apply a protective coating to 1018 / A36 like oil or black oxide to protect this material from corrosion.