Dezincification resistance of free cutting brass

[AnsAvi]

Is there a relationship between the dezincification resistance of C36000 (acidified salt spray environment) grade brass and its lead content? During my literature search, I have noticed conflicting opinions.
On a related issue, my understanding is that the corrosion resistance of this grade of brass can be improved if the volume fraction of the beta phase is reduced. Is there a way I can do it...perhaps a heat treatment that would increase the dezincification resistance?

 

[btrueblood]

The only way to reduce beta phase would be to reduce the content of zinc, aluminum, tin, silicon. Adding arsenic is supposed to help increase DZR.

 

[AnsAvi]

@btrublood - thanks for the reply.

1. Added Arsenic is a great idea. Would the material still meet the C360 spec?

2. From some literature review, it seems that using a slow cool from an annealing temperature can result in lower beta phase content. Has anyone perhaps tried it?