Progress on Marine Corrosion Resistant Steels

The development and utilization of marine resources have become one of the key targets for 21 st century along with the gradual depletion of resources on land. Research and application of marine corrosion resistant materials are the basis and prerequisite for marine development. Marine corrosion resistant steels are widely used in the crude oil tank,offshore platform,submarine oil and gas pipeline and large cross-sea bridge etc. Because many kinds of high strength low alloy steel have been used in the development and utilization of ocean,only the progress on corrosion resistant steel for crude oil tank and seawater corrosion resistant steel are reviewed in this work. For corrosion resistant steel for crude oil tank,the corrosion environment and mechanism of cargo oil tank are summarized,the current status in Japan,Korea,Ukraine,Russia and China are described. Furthermore,the characteristics of seawater corrosion resistant steel in United States,Japan,France and China are compared. Based on the above analysis,the existing problems and weakness in China,and the future countermeasures are thus proposed. Finally,the key technologies and core scientific problems in the development of oil tank and marine corrosion resistant high strength low alloyed steels are put forward.