With this method, the annual direct cost of corrosion was estimated by adding the cost of corrosion control methods
and services. The corrosion control methods that were considered include protective coatings, corrosion-resistant
alloys, corrosion inhibitors, polymers, anodes, cathodic protection, and corrosion control and monitoring equipment.
Other contributors to the total annual direct cost that were reviewed in this report are contract services
(i.e., non-owner/operator services), corrosion research and development, and education and training.