Acid dip effect on springs

Romulus · August 11, 2002, 03:10 PM

I would like to refinish a Rem 870 and I'm concerned about the pre-park pickling effect on the delicate ejector spring, as well as on the shell-stops - the "embrittlement thing". I'm so concerned about this that I'm soliciting opinions on different forums. This particular 870 has been parked before, and these springs are now black. What effect can acid dips and parkerizing (itself an acid solution) have on springs, particularly the thin little leaf-spring of the 870 ejector?

PS: George, do you have any thoughts on this? Thanks

C.R.Sam · August 11, 2002, 05:39 PM

Depending on the acid.
Good way to kill a spring.

Expirement...
Compress and tie a coil spring.
Put in mild hydrochloric (or such) acid.
The temp of the liquid will rise as energy is released from the spring.
And if you leave it in long enough, when you untie it, will stay at the compressed dimension.

Sam

Dfariswheel · August 11, 2002, 07:57 PM

For what it's worth, I know of no refinisher that removes either ejector or shell stop springs from the 870. They finish them with the parts in place.

George Stringer · August 12, 2002, 07:43 AM

Romulus, I've seen no ill effect on these parts from parkerizing. Like Dfariswheel said, unless the stops fall out or the ejector already needs replacing these parts are rarely removed for refinishing. I don't pickle parts prior to parkerizing and as I said I haven't seen any problems resulting from the phosphuric acid used in parkerizing solutions. George

Romulus · August 12, 2002, 02:03 PM

Thanks for your input, George Dfaris and Sam

August 11, 2002, 03:10 PM	#1
Romulus Senior Member Join Date: January 18, 2001 Location: Kettle Moraine country Posts: 897	Acid dip effect on springs I would like to refinish a Rem 870 and I'm concerned about the pre-park pickling effect on the delicate ejector spring, as well as on the shell-stops - the "embrittlement thing". I'm so concerned about this that I'm soliciting opinions on different forums. This particular 870 has been parked before, and these springs are now black. What effect can acid dips and parkerizing (itself an acid solution) have on springs, particularly the thin little leaf-spring of the 870 ejector? PS: George, do you have any thoughts on this? Thanks __________________ I knew Thomas Jefferson, he was a friend of mine...Governor Clinton, you're no Thomas Jefferson Ti faccio vedere come muore un italiano

August 12, 2002, 02:03 PM	#5
Romulus Senior Member Join Date: January 18, 2001 Location: Kettle Moraine country Posts: 897	Thanks for your input, George Dfaris and Sam __________________ I knew Thomas Jefferson, he was a friend of mine...Governor Clinton, you're no Thomas Jefferson Ti faccio vedere come muore un italiano

August 11, 2002, 05:39 PM	#2
C.R.Sam Senior Member Join Date: October 29, 1999 Location: Dewey, AZ Posts: 12,858	Depending on the acid. Good way to kill a spring. Expirement... Compress and tie a coil spring. Put in mild hydrochloric (or such) acid. The temp of the liquid will rise as energy is released from the spring. And if you leave it in long enough, when you untie it, will stay at the compressed dimension. Sam

August 11, 2002, 07:57 PM	#3
Dfariswheel Senior Member Join Date: May 4, 2001 Posts: 7,478	For what it's worth, I know of no refinisher that removes either ejector or shell stop springs from the 870. They finish them with the parts in place.

August 12, 2002, 07:43 AM	#4
George Stringer Staff Alumnus Join Date: October 12, 1998 Location: Earlington KY Posts: 2,299	Romulus, I've seen no ill effect on these parts from parkerizing. Like Dfariswheel said, unless the stops fall out or the ejector already needs replacing these parts are rarely removed for refinishing. I don't pickle parts prior to parkerizing and as I said I haven't seen any problems resulting from the phosphuric acid used in parkerizing solutions. George