The annual cost of corrosion to industry exceeded the trillion dollar mark in the US for the first time. This huge cost has led to the need for new developments in corrosion detection. Early detection of corrosion can lead to substantial savings if the corrosion can be abated once detected. Until recently, coatings have hindered the detection of corrosion. This paper describes a microwave method for detecting corrosion under coatings. The paper describes the detection method and provides examples of detection sensitivities and limits.

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