Pink Film

praetorian97 · February 7, 2012, 12:15 PM

What is that pink film that looks like corrosion on brass?

serf 'rett · February 7, 2012, 12:56 PM

Cartridge brass is roughly 70% copper and 30% zinc, IIRC. Exposure to acid can leach (dissolve) the zinc out of the brass, leaving the copper. I think this is the most common cause of the pink coloring.

praetorian97 · February 7, 2012, 04:32 PM

Should any concern be expressed?

serf 'rett · February 7, 2012, 05:41 PM

If female, Only if the pink is a different shade from your pink pistol.
If male, well you'll catch comments from your fellow shooters.

243winxb · February 7, 2012, 06:18 PM

Google > "stress corrosion cracking" & "dezincification" Brass can become weak and/or brittle.

February 7, 2012, 12:15 PM	#1
praetorian97 Senior Member Join Date: May 9, 2011 Location: Boise, ID Posts: 439	Pink Film What is that pink film that looks like corrosion on brass?

February 7, 2012, 12:56 PM	#2
serf 'rett Senior Member Join Date: June 25, 2009 Location: Stuttgart Posts: 1,038	Cartridge brass is roughly 70% copper and 30% zinc, IIRC. Exposure to acid can leach (dissolve) the zinc out of the brass, leaving the copper. I think this is the most common cause of the pink coloring. __________________ A lack of planning on your part does not necessarily constitute an emergency on my part.

February 7, 2012, 05:41 PM	#4
serf 'rett Senior Member Join Date: June 25, 2009 Location: Stuttgart Posts: 1,038	If female, Only if the pink is a different shade from your pink pistol. If male, well you'll catch comments from your fellow shooters. __________________ A lack of planning on your part does not necessarily constitute an emergency on my part.

February 7, 2012, 04:32 PM	#3
praetorian97 Senior Member Join Date: May 9, 2011 Location: Boise, ID Posts: 439	Should any concern be expressed?

February 7, 2012, 06:18 PM	#5
243winxb Senior Member Join Date: July 26, 2011 Posts: 598	Google > "stress corrosion cracking" & "dezincification" Brass can become weak and/or brittle.