In　this　study,　the　influences　of　Pd,　Au　and　Pt　on　the　glass-forming　ability　(GFA),　mechanical　property,　electrochemical　behavior　and　tribocorrosion　resistance　of　the　Ni-　and　Cu-free　Zr53Al16Co31　bulk　metallic　glass　(BMG)　were　investigated.　Alloying　of　noble　elements　enhances　the　GFA　and　the　Zr53Al16Co26M5　(M　=　Pd,　Au　and　Pt)　BMGs　with　a　diameter　of　5　mm　can　be　fabricated　by　copper　mold　casting.　The　ZrAlCo-based　BMGs　show　a　good　combination　of　mechanical　properties　with　a　high　yield　strength　of　over　2000　MPa,　low　Young＇s　modulus　of　about　93　GPa　and　high　hardness　of　over　550　HV.　Pd,　Au　and　Pt　take　a　significant　influence　on　the　corrosion　resistance　of　the　ZrAlCo-based　BMGs　in　phosphate　buffer　saline　(PBS)　solution.　The　ZrAlCoPt　alloy　exhibits　the　highest　corrosion　resistance　whereas　ZrAlCoAu　displays　the　lowest　one,　which　can　be　correlated　with　their　Zr　and　Al　concentration　in　the　surface　passive　film　of　alloys.　The　ZrAlCo-based　BMGs　illustrate　a　lower　wear　resistance　in　PBS　solution　than　that　in　air,　which　is　attributed　to　the　synergistic　effects　of　abrasive　and　corrosive　wear.　The　wear　resistance　of　ZrAlCo-based　BMGs　in　PBS　solution　highly　corresponds　to　their　corrosion　resistance.　The　ZrAlCoPt　alloy　demonstrates　the　highest　tribocorrosion　resistance　while　ZrAlCoAu　shows　the　lowest　one　among　these　four　ZrAlCo-based　BMGs.　The　possible　mechanism　of　corrosion　accelerating　wear　deterioration　is　discussed,　which　provides　the　guidance　for　the　improvement　in　the　tribocorrosion　resistance　of　Zr-based　BMGs　for　their　promising　biomedical　applications.　©　2017　Elsevier　B.V.