Alerts & Learnings Corrosion of Hollow Sections - Safety Moment Structural box section steelwork can corrode from the inside and can’t be seen until it’s too late. In this instance, the internal corrosion in the structure had not been identified by previous inspections until the base metal was completely corroded, exposing holes in the members. Download Learning Moment Rate this Learning Moment Your Rating Average Rating Share: Share on Linkedin Share on Facebook Share on Twitter Share with Email