Corrosion Protection with Direct-to-Metal Coatings
By Ana Juraga, Julie Holmquist, and Markus Bieber, Cortec Corp. |
Understanding the mechanisms driving corrosion-prevention technologies will help engineers to select the best coating materials and application procedures to ensure proper protection
Corrosion is a serious problem for all industries, but especially so in the chemical process industries (CPI). Just a general look at the total cost of corrosion for the U.S. alone is enough to indicate the significance of the issue. The report in Ref. 1 estimated the annual direct cost of corrosion to be $276 billion. Indirect costs, which are more difficult to measure and include losses related to downtime and litigation were estimated to be roughly equal to direct costs, bringing the combined cost of corrosion to $552 billion. The study found the direct cost of corrosion (apart from maintenance and operation) in the chemicals, petrochemicals and pharmaceuticals sectors to be an estimated $1.7 billion [ 1].
Coatings will always be needed on the many metal surfaces in a CPI plant. Because those coatings will be exposed to harsher conditions than average due to the nature of a chemical processing environment, it is important to take corrosion protection into consideration and choose durable coatings. Among the variety of ways to counter corrosion in…