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Numerous studies have estimated that the cost of corrosion for industrialized nations of the world is 3 to 4% of their gross domestic product. This cost is usually taken as the direct costs to replace corroded goods (e.g., structures, machines, electronics, etc.), corrosion control (e.g., application of coatings, cathodic protection systems, etc.), and use of corrosion resistant-materials when ordinary carbon steel has sufficient mechanical properties, but insufficient corrosion resistance. A study initiated by NACE in 1998 for the USA estimated the cost of corrosion to be $276 billion/year, and and update to the study in 2013 estimated the annual cost of corrosion in the U.S. to exceed $1 trillion. Here are some links to Corrosion Cost Studies:
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