The commonly used Corrosion Resistant Alloy UNS N08028 has been further
developed in order to enhance corrosion resistance in sour environments with high salinity.
Testing in oxidizing laboratory environment has shown that by increasing the PRE value from
39 to 42, the critical pitting temperature in chloride bearing solutions is increased. Furthermore,
the modifications made to the alloy also increase the resistance to sulphide induced stress
corrosion cracking and thereby enlargening the application window for the material. The
modified UNS N08028 has been installed and is successfully under operation in very harsh
environments within the Caspian Sea region. The upgraded properties of modified UNS
N08028 make it a candidate for sour environments with high salinity. This study summarizes
testing on mechanical, micro structural and corrosion properties.