2017 Volume 66 Issue 4 Pages 142-146
In order to evaluate and compare the corrosion resistance of 329J3L cast steel, 329J3L rolled steel and 329J4L rolled steel, field test using sea water, immersion test and electrochemical anodic polarization test in ferric chloride aqueous solution were conducted, and inclusions in 329J3L cast steel and 329J3L rolled steel were examined with SEM/EDS. 329J4L rolled steel having the highest PRE （pitting resistance equivalent） showed the highest corrosion resistance. The corrosion resistance of 329J3L cast steel was lower than that of 329J3L rolled steel although their PRE were nearly the same. The SEM/EDS analysis revealed that the number of inclusions which could induce corrosion was much more and the size of inclusions was larger in 329J3L cast steel than in 329J3L rolled steel.
