"According to DOD, corrosion can significantly affect the cost of facility maintenance and the expected service life of DOD facilities. While corrosion is not always highly visible, it can lead to structural failure, loss of capital investment, and environmental damage. In response to a congressional request, GAO reviewed DOD's corrosion prevention and control program for facilities and infrastructure. In this report, GAO assessed the extent that DOD (1) met reporting requirements, (2) maintained accurate return-on-investment data in its records, and (3) fully informed relevant officials of its corrosion-control efforts. GAO reviewed DOD policies and plans, met with corrosion-control officials, and visited and interviewed officials at 32 installations."