4.0 



3.0 



1 1 



LEGEND 



O Copper 



A Commercial bronze 



□ Red brass 



9 Yellow brass 



A Muntz mefal 



■ As Admiralty 



V Naval brass 



Mn bronze 



Al brass 



Ni brass 



Ni-Mn bronze 



6,000' 

 E^^^^ 2,500' 



600 800 



Exposure (days) 



Figure 17. Corrosion rates of copper- zinc alloys in sea water. 



