Several American Petroleum Institute (API) Standards and Recommended Practices speak directly to the basic need to control corrosion of the bottom, shell, and roof of aboveground storage tanks (ASTs) to assure tank integrity. These documents contain information and requirements related to corrosion that must be considered for new tanks, in their design and construction, and for existing tanks during inspection, maintenance and repair activities. This paper reviews the requirements contained in these documents and presents histories of internal and external corrosion that has occurred in ASTs.