Based　on　the　Tafel　formula,　Butler-Volmer　equation,　and　first-principles　calculations,　the　bulk　model,　surface　model,　and　polarization　prediction　curve　of　the　Hypereutectic　High　Chromium　Cast　Iron　(HHCCI)　matrix　were　constructed.　The　results　show　that　the　predicted　corrosion　current　density　(2.19　x　10-5　A　cm2)　of　the　copper　-bearing　HHCCI　matrix　is　lower　than　the　measured　corrosion　current　density　of　the　copper-bearing　HHCCI　(4.41　x　10-5　A　cm2)　under　the　acidic　condition　of　pH　=　1.　In　the　neutral　environment　of　pH　=　7,　the　corrosion　resistance　of　HHCCI　is　better　than　that　of　HHCCI　under　acidic　conditions.　The　predicted　corrosion　current　density　of　the　copper-bearing　HHCCI　matrix　(4.39　x　10-10　A　cm2)　is　also　smaller　than　that　of　copper-free　HHCCI　(7.98　x　10-10　A　cm2),　which　shows　that　the　corrosion　resistance　of　copper-containing　HHCCI　matrix　is　better　than　that　without　copper　from　the　perspective　of　first-principles　calculation.　Combined　with　the　electrochemical　experi-mental　results,　it　can　be　seen　that　the　corrosion　potential　(-409.76　mV)　of　1.5　wt　%　Cu　HHCCI　is　significantly　higher　than　that　of　0　wt　%　Cu　HHCCI　(-450.34　mV).　The　trend　of　the　electrochemical　test　results　is　consistent　with　the　predicted　trend　of　the　calculated　polarization　curve,　which　indicates　that　copper　alloying　can　improve　the　corrosion　resistance　of　HHCCI.