Method for corrosion inhibiting additive

Abstract

A method of selecting a corrosion-inhibiting substance includes selecting a corrosion-inhibiting substance to include a non-tungstate anodic corrosion inhibitor with respect to an amount of zinc in an aluminum alloy substrate that is to be coated with the corrosion-inhibiting substance.

What is claimed is: 
     
         1 . A method of selecting a corrosion-inhibiting substance, comprising:
 selecting a corrosion-inhibiting substance to include a non-tungstate anodic corrosion inhibitor with respect to an amount of zinc in an aluminum alloy substrate that is to be coated with the corrosion-inhibiting substance.   
     
     
         2 . The method as recited in  claim 1 , further including selecting the corrosion inhibiting substance to include the non-tungstate anodic corrosion inhibitor with respect to the amount of the zinc being between about 5.1 and 6.1 wt% of the aluminum alloy. 
     
     
         3 . The method as recited in  claim 2 , further including selecting the corrosion inhibiting substance also with respect to an amount of copper in the aluminum alloy substrate that is to be coated with the corrosion-inhibiting substance. 
     
     
         4 . The method as recited in  claim 2 , further including selecting the corrosion inhibiting substance to include the non-tungstate anodic corrosion inhibitor with respect to the amount of the copper being between 1.2 wt% and 2.0 wt%. 
     
     
         5 . The method as recited in  claim 1 , including selecting the non-tungstate anodic corrosion inhibitor to include at least one of vanadium and molybdenum. 
     
     
         6 . The method as recited in  claim 1 , including selecting the non-tungstate anodic corrosion inhibitor to include zinc molybdate. 
     
     
         7 . The method as recited in  claim 1 , including selecting the corrosion inhibiting substance to include a cathodic corrosion inhibitor comprising at least one Group IIIB Periodic Table element. 
     
     
         8 . A method of selecting a corrosion-inhibiting substance, comprising:
 selecting a corrosion-inhibiting substance to include a non-tungstate anodic corrosion inhibitor based upon an amount of at least one alloying element in an aluminum alloy substrate that is to be coated with the corrosion-inhibiting substance.   
     
     
         9 . The method as recited in  claim 8 , wherein the at least one alloying element comprises zinc, and further including selecting the corrosion inhibiting substance to include the non-tungstate anodic corrosion inhibitor based upon the amount of the zinc being between greater than 0.25 wt% of the aluminum alloy. 
     
     
         10 . The method as recited in  claim 8 , wherein the at least one alloying element comprises zinc, and further including selecting the corrosion inhibiting substance to include the non-tungstate anodic corrosion inhibitor based upon the amount of the zinc being between about 5.1 and 6.1 wt% of the aluminum alloy. 
     
     
         11 . The method as recited in  claim 8 , including selecting the non-tungstate anodic corrosion inhibitor to include at least one of vanadium and molybdenum. 
     
     
         12 . The method as recited in  claim 11 , including selecting the non-tungstate anodic corrosion inhibitor to include zinc molybdate. 
     
     
         13 . The method as recited in  claim 8 , including selecting the corrosion inhibiting substance to include a cathodic corrosion inhibitor comprising at least one Group IIIB Periodic Table element.