Corrosion resistant aluminum alloy

Abstract

An aluminum alloy composition includes a corrosion resistant aluminum alloy selected from the group consisting of: a 1xxx series aluminum alloy, a 3xxx series aluminum alloy, and a 5xxx series aluminum alloy. The corrosion resistant aluminum alloy includes not greater than 0.04 wt. % Fe, not greater than 3 wt. % Mg, an effective amount of a corrosion resistant additive, and the balance being aluminum.

What is claimed is: 
     
         1 . An aluminum alloy composition comprising:
 a corrosion resistant aluminum alloy selected from the group consisting of:
 a 1xxx series aluminum alloy; 
 a 3xxx series aluminum alloy; and 
 a 5xxx series aluminum alloy; 
   wherein the corrosion resistant aluminum alloy includes:
 not greater than 0.04 wt. % Fe; 
 not greater than 3 wt. % Mg; and 
 an effective amount of a corrosion resistant additive. 
   
     
     
         2 . The aluminum alloy composition of  claim 1 , wherein the corrosion resistant additive is present in an amount such that the corrosion resistant aluminum alloy has an improved corrosion resistance as compared to an aluminum alloy without the corrosion resistant additive, when measured in accordance with an electrochemical cell test. 
     
     
         3 . The aluminum alloy composition of  claim 1 , wherein:
 the corrosion resistant aluminum alloy includes not greater than 0.1 wt. % of the corrosion resistant additive; and   the corrosion resistant additive is present in the corrosion resistant aluminum alloy at the effective amount.   
     
     
         4 . The aluminum alloy composition of  claim 3 , wherein the corrosion resistant aluminum alloy includes at least 0.002 wt. % of the corrosion resistant additive. 
     
     
         5 . The aluminum alloy composition of  claim 3 , wherein the corrosion resistant aluminum alloy includes at least 0.005 wt. % of the corrosion resistant additive. 
     
     
         6 . The aluminum alloy composition of  claim 3 , wherein the corrosion resistant aluminum alloy includes at least 0.01 wt. % of the corrosion resistant additive. 
     
     
         7 . The aluminum alloy composition of  claim 3 , wherein the corrosion resistant aluminum alloy includes at least 0.015 wt. % of the corrosion resistant additive. 
     
     
         8 . The aluminum alloy composition of  claim 4 , wherein the corrosion resistant aluminum alloy includes not greater than 0.07 wt. % of the corrosion resistant additive. 
     
     
         9 . The aluminum alloy composition of  claim 4 , wherein the corrosion resistant aluminum alloy includes not greater than 0.05 wt. % of the corrosion resistant additive. 
     
     
         10 . The aluminum alloy composition of  claim 4 , wherein the corrosion resistant aluminum alloy includes not greater than 0.03 wt. % of the corrosion resistant additive. 
     
     
         11 . The aluminum alloy composition of  claim 4 , wherein the corrosion resistant aluminum alloy includes not greater than 0.025 wt. % of the corrosion resistant additive. 
     
     
         12 . The aluminum alloy composition of  claim 4 , wherein the corrosion resistant aluminum alloy includes not greater than 0.02 wt. % of the corrosion resistant additive. 
     
     
         13 . The aluminum alloy composition of  claim 4 , wherein the corrosion resistant aluminum alloy includes not greater than 0.01 wt. % of the corrosion resistant additive. 
     
     
         14 . The aluminum alloy composition of  claim 4 , wherein the corrosion resistant aluminum alloy includes not greater than 0.005 wt. % of the corrosion resistant additive. 
     
     
         15 . The aluminum alloy composition of  claim 1 , wherein the corrosion resistant additive is selected from the group consisting of Zn, Ga, and combinations thereof. 
     
     
         16 . The aluminum alloy composition of  claim 15 , wherein the corrosion resistant aluminum alloy comprises from 20 ppm to 500 ppm of Zn, or from 20 to 500 ppm of Ga, or both. 
     
     
         17 . The aluminum alloy composition of  claim 16 , wherein Zn and Ga are present in equal amounts. 
     
     
         18 . The aluminum alloy composition of  claim 16 , wherein Zn is present in a greater amount than Ga. 
     
     
         19 . The aluminum alloy composition of  claim 16 , wherein Zn is present in a lesser amount than Ga. 
     
     
         20 . The aluminum alloy composition of  claim 1 , wherein:
 the corrosion resistant aluminum alloy includes unavoidable minor components; and   the unavoidable minor components are present as a function of alloying the corrosion resistant aluminum alloy.