The Cr

x

CuFe

2

Mo

0.5

Nb

0.5

Ni

2

（x=0

0.5

1.0

2.0）high entropy alloys were prepared by arc melting process.The corrosion resistance of these alloys and S304 stainless steel was analyzed by means of immersion and electrochemical polarization tests in 1 mol/L H

2

SO

4

solution.The results show that the immersion corrosion rate of alloys with x=1.0and x=2.0is about 0.07mm/y and far below that of alloy with x=0and x=0.5and S304 alloys

which show that the alloys with x=1.0and x=2.0have a relatively descrable acid-resistance.The corrosion type of alloys with x=0and x=0.5exhibit mainly intergranular corrosion

while the corrosion surfaces of alloys with x=1.0and x=2.0are slight and the corrosion types are primarily uniform corrosion and pitting corrosion.The Cu

Nb

Mo elements in the alloys with x=0and x=0.5has a serious segregation

while the alloying elements are distributed homogeneously in the alloys with x=1.0and x=2.0.Therefore

the alloys with x=1.0and x=2.0have a better corrosion resistance than that of other alloys because of the slightly galvanic cell corrosion.Electrochemical polarization tests show that the alloy with x=2.0has the desirable acid-resistance among these alloys.The average corrosion rate of alloy with x=2.0is about 0.02mm/y

which is only about4% of the average corrosion of S304 stainless steel.