On Sep 3, 7:15*am, (Richard Casady) wrote:
On Wed, 2 Sep 2009 20:03:04 -0700 (PDT), Frogwatch

wrote:
Today, I dug out the old bronze prop whose blade edges were so
depleted of zinc

What kind of bronze contains zinc? Brasses are copper/zinc alloys,
bronzes are mostly copper/tin. Disappearing zinc is why brass is not
used in many applications.

Casady

OK. 'twas a late night brain freeze but the bronze is wasted and
corroded somehow.