Abstract
The corrosion and cavitation erosion-corrosion behaviour of two newly developed Fe-10Cr martensitic steels were investigated in 3.5 % NaCl solution compared with 304 stainless steel. It is found that the passivation ability of the martensitic steel was improved and the corrosion rate was decreased by the addition of Zr. The mass loss test showed that the martensitic steels, especially the steel microalloyed with Zr had better cavitation erosion-corrosion resistance than 304 stainless steel. Further characterisation of the white layer on the damaged surface indicated that the addition of Zr changed the cavitation erosion-corrosion mechanism of the martensitic steel.
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