By Rick Huntley, KTA-Tator, Inc.; and Dan Boich, St. Lawrence Seaway Management Corporation

Since its opening, the St. Lawrence Seaway has moved more than 2.5 billion metric tons of cargo with an estimated value of more than $375 billion. Authorities in Canada and the U.S. work together to protect the gates on the locks from corrosion in order to remain operable for decades to come. The authors explain the factors at play during coating selection—particularly critical as coatings must be installed in the winter and in a short period of time during scheduled outages....