All of the alloys are being compared with CuNi30Cr2 wrought alloy in a series of galvanic, crevice corrosion and mechanical tests specimens.
In total there are over 400 samples in three locations two in sea water and a third in a neat sewerage channel with high hydrogen sulphide levels.
At the end of the two year project the results will be a valuable guide to design engineers. It is believed that this project is a first, for so many sea water alloys being tested in one environment at the same time.
Racks after two months in polluted sea water
Crevice Corrosion Samples after 3 months
Crevice corrosion samples third from left 304 stainless
Galvanic Corrosion Samples after 3 Months
Corrosion product growing from (19) 316 stainless (20) 304 stainless
and (21) 17/4 Super duplex