Some trailer manufacturers have tried to help ease the maintenance burden by using more advanced and durable materials during construction. Brett Wilkie, field service engineer for advanced design and material for Wabash National, said component manufacturers also have upgraded factory coating application systems, which have shown to limit areas of minimal coating thickness. For barrier coatings, polymer-based products such as urethane, epoxy, vinyl, nylon, acrylic, polyester, wax and rubberized undercoatings typically are used. Sacrificial metal coatings such as zinc (hot-dipped galvanized), nickel, galvalume (zinc and aluminum) and biopolymer also are used to fight corrosion, said Chris Lee, vice president of engineering for Great Dane. Trailers can sit idle for long periods of time, making their steel components highly susceptible to corrosion. “The trailer (OEMs) have gotten rid of paint on the rear ends,” Steve Zaborowski, senior vice president for Xtra Lease, said. “We have all galvanized frames on dry van trailers. We have stainless on the rear frames of refrigerated trailers, and most of our flatbeds are now a combination of aluminum and steel combined. The less steel i...