Sour Service Testing of High Strength TS Temper CuNiSn Alloy (UNS C72900)

摘要

A modern high strength ternary alloy containing 15Ni-8Sn-Cu has been developed and delivers new combinations of high strength and corrosion resistance. This alloy is in commercial use in aggressive tribological environments and has exhibited excellent performance characteristics. Prior work demonstrated excellent seawater corrosion resistance and reasonable corrosion resistance in NACE Levels I, III and V solutions. The alloy also exhibited SCC resistance in similar solutions. This paper documents the basic SCC and corrosion rate behavior of a new 150 ksi yield strength TS temper in Levels I, II, IV, V and VII environments. Microstructural observations, corrosion rate and resistance to SCC in full immersion proof ring static tensile tests are reported.