Jim R. posted:Impurities in the process of casting zinc alloys causes the finished castings to deteriorate in a short period of time. The deterioration often causes the castings to expand. If a casting is contained, like in the case of a frame secured inside a car body, it warps as it tries to expand.
Zinc pest, which was a problem in the prewar period, and occasionally in the postwar period, in American production has resurfaced in Chinese production in the past 20 years. It's still relatively uncommon, but we have been sharing a few examples here. In fact, the topic has been discussed at length in the past two weeks and was still active just several days ago.
You might want to acquaint yourself with the search function on this forum. The answers are typically already there.
I am well aware of the search function of this Forum.It was just a simple question as you were quickly willing to compose a two paragraph answer.No harm done.Nick
