Design considerations for steel bridge coatings include exposure environment, aesthetics, application, and cost. Steel bridge coatings must offer protection against corrosion. Current techniques include traditional three-coat zinc, epoxy, urethane systems, galvanizing, and thermal spray metallization. Another pathway for steel protection includes the use of decades-old inorganic zinc spray-applied coatings. This approach offers the performance of a metallized coating while using conventional spray application. What's new is the use of an inorganic topcoat that maintains performance and shop throughput while adding color and aesthetics. This study will compare a two-coat inorganic coating system alongside galvanized, thermal spray metallizing, and sealed thermal spray metallizing systems in corrosion resistance lab testing. A discussion of applied cost and throughput will be presented, along with a review of the chemistry of this approach and the sustainability benefits it offers.

A survey of real-world use cases illustrates the flexibility and performance of surface-tolerant epoxy mastic coatings in both routine and unique settings.

Jack Walker and Paul Atzemis discuss Organic Zinc. This is the follow up to Episodes 015 and 016 on Inorganic Zinc. This discussion is the second part in a series of the how and why in making coating

An intumescent coating can be qualified or disqualified for use simply because it falls above or below a certain magical hardness level, usually as measured on the Shore D scale. But hardness has no influence on performance, and the Shore D scale just doesn’t make sense when assessing softer intumescent technology types. Fireproofing industry veteran Michael Hollman explains the consequences of misusing Shore D hardness in intumescent coating specifications. Also, Michael worries that his brother-in-law might soon beat him at snooker.

To protect its new ML-2 launcher from Florida's humid coastal environment, NASA turned to corrosion protection technology it knows very well. Read how the Carbozinc/Armorlast system fits into ambitious Artemis moon missions.