Chromium-Aluminum Binary Alloy Having Excellent Corrosion Resistance and Method of Manufacturing Thereof

Abstract

The present disclosure relates to a chromium-aluminum binary alloy with excellent corrosion resistance and a method of producing the same, and more particularly to a chromium-aluminum binary alloy with excellent corrosion resistance, including: 1 to 40% by weight of aluminum (Al), the balance of chromium (Cr), and other unavoidable impurities with respect to a total weight of the alloy, and a method of producing a chromium-aluminum binary alloy with excellent corrosion resistance, the method including: (Step 1 ) mixing and melting a raw material comprising: 1 to 40% by weight of aluminum (Al), the balance of chromium (Cr), and other unavoidable impurities with respect to a total weight of the alloy; and (Step 2 ) solution treating the alloy melted in Step 1. The chromium-aluminum binary alloy may be easily produced and has ductility, thus being highly applicable as a coating material for a material requiring high-temperature corrosion resistance and wear resistance.

What is claimed is: 
     
         1 . A chromium-aluminum binary alloy with excellent corrosion resistance, comprising: 1 to 40% by weight of aluminum (Al), the balance of chromium (Cr), and other unavoidable impurities with respect to a total weight of the alloy. 
     
     
         2 . The chromium-aluminum binary alloy of  claim 1 , wherein the aluminum is contained in an amount of 1 to 18% by weight or 22 to 40% by weight with respect to the total weight of the alloy. 
     
     
         3 . A method of producing a chromium-aluminum binary alloy with excellent corrosion resistance, the method comprising:
 (Step  1 ) mixing and melting a raw material comprising: 1 to 40% by weight of aluminum (Al), the balance of chromium (Cr), and other unavoidable impurities with respect to a total weight of the alloy; and   (Step  2 ) solution treating the alloy melted in Step  1 .   
     
     
         4 . The method of  claim 3 , wherein the aluminum is contained in an amount of 1 to 18% by weight or 22 to 40% by weight with respect to the total weight of the alloy. 
     
     
         5 . The method of  claim 3 , wherein the melting of Step  1  is performed at a temperature of 1400° C. to 1800° C. 
     
     
         6 . The method of  claim 3 , wherein the solution treating of Step  2  is performed at a temperature of 950° C. to 1200° C. 
     
     
         7 . A chromium-aluminum binary alloy with excellent corrosion resistance, produced according to the method of  claim 3 ,
 the chromium-aluminum binary alloy having a hardness of 250-450 Hv, and high-temperature oxidation resistance 100 to 200 times higher than that of a zircaloy-4 alloy, 5 to 10 times higher than that of pure chromium, and 2 to 10 times higher than that of an FeCrAl alloy.   
     
     
         8 . A high-temperature environment structural material comprising the chromium-aluminum binary alloy with excellent corrosion resistance of  claim 7 . 
     
     
         9 . A surface coating material for a metal material, comprising the chromium-aluminum binary alloy with excellent corrosion resistance of  claim 7 . 
     
     
         10 . The surface coating material of  claim 9 , wherein the metal material is stainless steel or inconel.