Can hot-dip galvanized steel be used for beds of dump trucks for road salts?
Road salts can be very corrosive to galvanized steel (as well as other protective coatings). When the salts are dry they are not very corrosive, but once water is added to the salts, the saltwater solution will aggressively attack the galvanized coating. If water is expected to accumulate on top of the salts and then seep down (which is reasonable to assume due to precipitation), it is reasonable to expect the galvanized coating to be consumed rather quickly in areas where saltwater solutions accumulate. If it is possible to have drain holes in the bed of the truck that allow water to flow out while still containing the road salts, that would help limit corrosion due to the wet road salts. The galvanized coating can also be coated with paint, powder coating, or epoxy to increase its corrosion protection.
© 2019 American Galvanizers Association. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel. This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. The information provided herein is not intended as a representation or warranty on the part of the AGA. Anyone making use of this information assumes all liability arising from such use.