Corrosion and Heat Treatment

[Allen Humphrey]

I post this with the realization that it may only be interesting to me....

During one of my material science classes where I stayed awake, the professor commented that the rate of corrosion of chemically identical steels can vary dramatically depending on heat treatment processes. I have seen a few examples of this but perhaps none better than this 1917. Compare the annealed ends to the still hard middle.

http://www.gunbroker.com/Auction/Vie...Item=371167889

Picture 8 shows it especially well

[Kurt]

Allen, very interesting observation! I can't think of one I've seen as glaring as that and frankly wouldn't have associated it with the different treatments those area's received.

Thanks for staying awake that one time...

Kurt

[chuckindenver]

notice the ring on the bolt face...think id stay away from this one..

[da gimp]

Blown primer(s)from headspace being off, chuck?

[chuckindenver]

corrosive primed, and lack of cleaning id say