Construction hardware and method of reducing corrosion thereof

Abstract

A method of reducing corrosion in an article of construction hardware resulting from exposure to ACQ treated lumber and an article of construction hardware treated in accordance with such method.

1 . A method of reducing ACQ wood preservative corrosion of an article of construction hardware comprising: 
 providing a roll of construction hardware steel;    applying a protective layer of zinc of at least G60 thickness to said hardware steel;    applying a moisture barrier coating to said protective layer of zinc; and    manufacturing an article of construction hardware from the coated steel.    
     
     
         2 . The method of  claim 1  wherein said moisture barrier layer is Magni L94.  
     
     
         3 . The method of  claim 1  including applying an adhesion promoting chemical pretreatment to said protective layer of zinc prior to applying said moisture barrier coating.  
     
     
         4 . The method of  claim 3  wherein said chemical pretreatment is one of Bonderite 1402W, Bonderite 1455SF, Bonderite 1303 and Bonderite 1421-A.  
     
     
         5 . The method of  claim 1  wherein said protective zinc layer is treated with light oil prior to applying said chemical pretreatment.  
     
     
         6 . The method of  claim 1  including applying a dry film lube to said moisture barrier coating.  
     
     
         7 . The method of  claim 6  wherein said dry film lube is Henkel Drawco DFL 767.  
     
     
         8 . The method of  claim 1  including manufacturing said article of construction hardware by stamping.  
     
     
         9 . The method of  claim 2  including applying an adhesion promoting chemical pretreatment to said protective layer of zinc prior to applying said moisture barrier coating wherein said chemical pretreatment is one of Bonderite 1402W, Bonderite 1455SF, Bonderite 1303 and Bonderite 1421-A and including applying a dry film lube to said moisture barrier coating wherein said dry film lube is Henkel Drawco DFL 767.  
     
     
         10 . A method of reducing ACQ wood preservative corrosion of an article of construction hardware comprising: 
 providing a roll of zinc coated steel with a zinc thickness of at least G60;    forming an article of construction hardware from said roll; and    applying a moisture barrier coating to said article over said zinc.    
     
     
         11 . The method of  claim 10  wherein said moisture barrier layer is Magni L94.  
     
     
         12 . The method of  claim 10  including applying an adhesion promoting chemical pretreatment to said layer of zinc prior to applying said moisture barrier coating.  
     
     
         13 . The method of  claim 12  wherein said chemical pretreatment is one of Bonderite 1402W, Bonderite 1455SF, Bonderite 1303 and Bonderite 1421-A.  
     
     
         14 . The method of  claim 13  wherein said moisture barrier layer is Magni L94.  
     
     
         15 . An article of construction hardware comprising: 
 a base article of construction hardware comprised of steel coated with zinc of at least G60 thickness and    a moisture barrier coating applied to said zinc.    
     
     
         16 . The article of  claim 15  wherein said moisture barrier coating is Magni L94.  
     
     
         17 . The article of  claim 15  including an adhesion promoting chemical pretreatment between said zinc and said moisture barrier coating.  
     
     
         18 . The article of  claim 15  including a coating of a dry film lube on said moisture barrier coating.  
     
     
         19 . The article of  claim 16  including an adhesion promoting chemical pretreatment between said zinc and said moisture barrier coating and including a coating of a dry film lube on said moisture barrier coating.  
     
     
         20 . The article of  claim 19  wherein said chemical pretreatment is one of Bonderite 1402W, Bonderite 1455SF, Bonderite 1303 and Bonderite 1421-A and wherein said dry film lube is Henkel Drawco DFL 767.