Erosion wear behavior of high chromium cast iron with different Cr content（Cr12

Cr15

Cr23 and Cr28）was observed in liquid-solid two-phase flow（H

2

SO

4

+quartz sand）.Surface morphologies and the phase constituent of corrosion products were analyzed by means of optical microscope（OM）

scanning electron microscopy（SEM）and X-ray diffraction（XRD）.Erosion wear behavior was investigated by the analysis of weight loss per unit area.The results reveal that the matrix is firstly susceptible to corrosion

and corrosion products have an important influence on erosion wear behavior.When Cr content is lower than 15%

corrosion products have the absence of oxidation film or presence of Fe

2

O

3

film

so weight loss per unit area is increased as a result of the interaction of corrosion and erosive wear.With more than 23% high chromium cast iron

the corrosion products are mainly composed of Fe

2

O

3

and Cr

2

O

3

.With thickness of Cr

2

O

3

film increased to a certain degree

the erosion wear behavior is delayed

so weight loss per unit area is increased firstly and then decreased.