Erosion-corrosion resistant alloy development for aggressive slurry flows

Erosion-corrosion (E-C) experiments of 316L and two sigma phase reinforced Cr-Ni-Mo steels, S1 and S2, were conducted in 10 wt% H2SO4 + 15 wt.% corund um sand to quantify the contributions of erosion, corrosion and their syner gistic components to the total wear weight loss. The results showed that un der severe E-C conditions, though increasing corrosion resistance was benef icial to decreasing synergistic weight loss rate, increasing erosion resist ance by large amounts of sigma phase was more efficient to reduce the total weight loss rate of the steer. Therefore, the optimization of the balance between erosion and corrosion resistance to achieve the least synergistic e ffects between erosion and corrosion is a good way to develop the materials for slurry E-C resistance. (C) 2000 Elsevier Science B.V. All rights reser ved.