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Dezincification resistance of free cutting brass

Dezincification resistance of free cutting brass

(OP)
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?

RE: Dezincification resistance of free cutting brass

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.

RE: Dezincification resistance of free cutting brass

(OP)
@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?

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