Titanium alloy having high corrosion resistance in bromine-ion-containing environment

Abstract

To provide a titanium alloy having corrosion resistance that is as high as or higher than before, and high corrosion resistance in a bromine-ion-containing environment, the alloy being able to be manufactured at low cost. [Solution] Provided is a titanium alloy to be used in a bromine-ion-containing environment, the titanium alloy consisting of, in mass %, a platinum group element: greater than or equal to 0.01% and less than or equal to 0.10%, a rare earth element: greater than or equal to 0.001% and less than 0.02%, O: greater than or equal to 0% and less than 0.1%, and the balance: Ti and impurities. The titanium alloy may contain, instead of part of Ti, one or more selected from the group consisting of Ni, Co, Mo, V, Cr, and W. The platinum group element is desirably contained in, in mass %, greater than or equal to 0.01% and less than or equal to 0.05%. The rare earth element is desirably contained in, in mass %, greater than or equal to 0.001% and less than 0.02%.

1 - 7 . (canceled) 
     
     
         8 . A titanium alloy to be used in a bromine-ion-containing environment, the titanium alloy consisting of, in mass %,
 a platinum group element: greater than or equal to 0.01% and less than or equal to 0.10%,   a rare earth element: greater than or equal to 0.001% and less than 0.02%,   O: greater than or equal to 0% and less than 0.1%, and   the balance: Ti and impurities.   
     
     
         9 . The titanium alloy according to  claim 8 ,
 wherein the titanium alloy contains, instead of part of Ti, one or more selected from the group consisting of Ni, Co, Mo, V, Cr, and W,   the content of Ni is less than or equal to 1.0 mass %,   the content of Co is less than or equal to 1.0 mass %,   the content of Mo is less than or equal to 0.5 mass %,   the content of V is less than or equal to 0.5 mass %,   the content of Cr is less than or equal to 0.5 mass %, and   the content of W is less than or equal to 0.5 mass %.   
     
     
         10 . The titanium alloy according to  claim 8 , consisting of, in mass %,
 the platinum group element: greater than or equal to 0.01% and less than or equal to   
     
     
         0 . 05%. 
     
     
         11 . The titanium alloy according to  claim 9 , consisting of, in mass %,
 the platinum group element: greater than or equal to 0.01% and less than or equal to 0.05%.   
     
     
         12 . The titanium alloy according to  claim 8 , wherein the platinum group element is Ru. 
     
     
         13 . The titanium alloy according to  claim 9 , wherein the platinum group element is Ru. 
     
     
         14 . The titanium alloy according to  claim 10 , wherein the platinum group element is Ru. 
     
     
         15 . The titanium alloy according to  claim 11 , wherein the platinum group element is Ru. 
     
     
         16 . The titanium alloy according to  claim 8 , wherein the rare earth element is Y. 
     
     
         17 . The titanium alloy according to  claim 9 , wherein the rare earth element is Y. 
     
     
         18 . The titanium alloy according to  claim 10 , wherein the rare earth element is Y. 
     
     
         19 . The titanium alloy according to  claim 11 , wherein the rare earth element is Y. 
     
     
         20 . The titanium alloy according to  claim 12 , wherein the rare earth element is Y. 
     
     
         21 . The titanium alloy according to  claim 13 , wherein the rare earth element is Y. 
     
     
         22 . The titanium alloy according to  claim 14 , wherein the rare earth element is Y. 
     
     
         23 . The titanium alloy according to  claim 15 , wherein the rare earth element is Y. 
     
     
         24 . The titanium alloy according to  claim 8 , wherein the content of O is less than 0.05 mass %. 
     
     
         25 . The titanium alloy according to  claim 8 , wherein the titanium alloy is used in a chemical plant apparatus.