A cyclic salt-fog test was used to characterize the corrosion control of various aluminum foil coatings on rusted steel. In the maintenance of minimally prepared steel in a marine atmosphere, a properly designed coating system, containing an aluminum foil layer, would be expected to be significantly more durable than a traditional liquid applied coating.
This paper is a significant update to “Costing Considerations for Maintenance and New Construction Coating Work”1 on protective coating costing and selection co-authored by M. F. Melampy, M. P. Reina and K. R. Shields in 1998. Designed to assist the coatings engineer or specifier in identifying suitable protective coating systems for specific industrial environments.
Corrosion protection of infrastructure and assets is an area of increasing focus due to increasing financial and safety concerns. On a global scale, corrosion has an annual cost of $2.5 trillion (USD).1 To combat the deleterious effects of this natural phenomenon, specifiers and owners have many choices in terms of materials and protective coatings. Consideration of both initial and life cycle costs has become more important in the age of increased competition and shrinking maintenance budgets.
Bridge Owners are always on the lookout for a coating system for steel bridges that will perform for the longest time, and at a reasonable price. Metallizing has long been considered one of the best coating systems but the lack of qualified applicators simply has not made it available as an economical option. The success of early metallizing encouraged the investment in metallizing for Owners and bridge fabricators, and spurred on its significant growth over the past decade.
Metallizing in NH was a coating used only sparingly in the past at critical locations on two major bridges. Its greater use was severely limited by the lack of qualified applicators, absence from bridge fabricator operations, and overall excessive cost. This picture changed dramatically with the impetus of the new metallized Memorial Bridge project and the massive investment in metallizing equipment at a large local bridge fabricator that made metallizing possible for this bridge. The successful use and ten-year performance of the thermal spray coating (TSC), i.e. metallizing, on this bridge has had a significant impact on metallized New England bridges to