Abstract: In order to improve resistance to the seawater erosion,the home-made B10 alloy had been modified,and its compositions,microstructures and seawater erosion behavour and anti-fouling property are tested and compared with the Germany-made B10 alloy.The test results reveal that the seawater erosion resistance of the modified home-made B10 alloy matches with the Germany-made B10 alloy.Further,some applications of the modified B10 alloy are introduced.