In the context of this report, services are defined as companies, organizations and individuals that provide contract services for corrosion control purposes, while excluding corrosion-related activities that owners/operators may do in-house. By taking the NACE International membership as a basis, a total number of engineers and scientists, that provide corrosion control services may be estimated. Based on a 16,000 membership in 1998 and the assumption that 25 percent provides contract corrosion control services, a total services cost of $1.2 billion was estimated.