by flintlok » Tue Jan 07, 2014 12:29 am
Also I would be remiss to mention that you should wash the barrels with soap (dish detergent will do fine) and hot water ( the hotter the better). The soap is ecessary to lower the surface tension of the water so it will better wet the surfaces. The reason it's sometimes necessary is that some salts are not super soluable in cold water, potassium chloride notably, and there are others. Hot water will open the pores in the metal and cause the salt to release easier as well as better dissolve the residual salts. Acid rain is also a issue. The acid content of the rain is near that if vinegar (pH 4.something or other) and that does not help bluing at all. I tend to use a bit of ammonia also with my hot water solutions as it tend to neutalize acid salts and the ammonia will cut through old oils and grease. Once the barrels are clean, that the time to apply the grease or you lubricant of your choice. At least, make sure that it a gun oil and never, ever, WD 40 that gums and will volatilize away. I one made the mistake of using a machinist oil (Starrett) and God did that crap ever rust the bore non chromed of one of my AR 15's. It had to have either a high chloride concentration or a high acid number. No matter it was junk and cost me $600 dollars to replace the barrel. Alway use a gun oil designed for guns.
I'm always concocting solutions at work that eat the crap out of the mechanics tool. I gave you the same advice I give to them and it works. I have a ammonium salts/ammonia copper etch solution that if not rinsed off properly does a great job eating chome vanadium tool steel. Hot water works every time to remove the salts, cold water never does.
The faster I go, the older I get.
"I am with you Flintsy ." SidebySide
Flintlok, I think you're dead right....."The Dogge"
" when an American comes on the forum .....and then gets a bit upperty ..."
token yank