Ag-bearing　antibacterial　duplex　stainless　steels　were　prepared　by　adding　Cu-Ag　alloy　particles　into　the　master　alloy　of　CD4MCu.　The　microstructure　and　Ag-rich　phase　of　the　steels　after　solution　treatment　at　1150　°C　were　characterized　by　SEM,　XRD　and　EDS.　The　pitting　corrosion　resistance　of　the　steels　in　different　solutions　was　assessed　by　electrochemical　means　in　comparison　with　CD4MCu　duplex　stainless　steel.　The　results　indicated　that　the　Ag-rich　phase　of　Ag-bearing　steels　can　not　be　fully　dissolved　into　the　matrix　so　that　the　physical　and　chemical　properties　of　the　steel　surface　are　not　consistent;　the　pitting　corrosion　resistance　of　the　Ag-bearing　steels　differs　from　the　CD4MCu　to　some　extent　in　different　solutions.　In　comparison　with　the　CD4MCu,　The　Ag-bearing　steel　exhibits　lower　pitting　corrosion　resistance,　higher　corrosion　current　density　and　weaker　stability　of　the　formed　passive　film　in　3.5%NaCl　solution　and　sterile　liquid　culture　medium.　In　the　contrast,　which　exhibits　better　resistance,　lower　corrosion　current　density　and　higher　stability　of　the　formed　passive　film　in　Cl-containing　30%　acetic　acid　solution　and　Escherichia　coli　solution　respectively.　©　2017　Chinese　Academy　of　Sciences,　All　Rights　Reserved.