AR Sponsor
Posted: 2/17/2007 9:39:40 AM EDT
| have seen for years to "not use graphite " around the AR-15 family of weapons,why is that a no-no ???? thanks jwr |
TECHNICAL NOTE 62, LUBRICATION OF FIREARMS 
|
rember in the line of galvanic corrosion Al you upper and lower will corrode in order to save the graphite. too prevent corrosion from galvanic recation metals used should be close to on another in the chart. www.corrosion-doctors.org |
Hated chemistry.. English please? Should I take her apart and clean it up? |
No You have to use some sort or anti-seize to protect the threads. Its recomended you use moly disulfide, but Ive heard of using autoparts stuff as long as it doesnt have metal particles as the lube. |
|
for barrels I just use plain pl-10 NLGI No 2 bearing grease. molly grease is the better option as if the grease fades away you still have the molly left acting as an anti-seize. Me personally I pull it off. You need more than just the two materials in contact for corrosion to start. "There is a lot of noise about this on the boards. Truth is, you just want a decent grease that will keep the barrel nut from galling, and has a high temperature rating so it wont run out and dissipate over time. It's really not all that important. Any standard wheel bearing grease, available at ANY auto parts store, will do just fine" |
So are you saying that the aluminum of the receiver will become the sacrivicial metal that will corrode instead of the graphite? Sort of like the people that attach a block of zinc to their cars as a sacrificial materail to keep their cars from rusting (if that actually works)? |
Yes, but more like Zinc hull plates. |
|
Something you may wish to check into.... Graphite based anti-seize is corrosive. Moly disulfide does some very nasty stuff to your health, There is a new copper based anti-seize on the market. I've been using it at work for years. ( wrong link posted, see post below ) |
My mistake, that was the wrong link. Here it is... www.jetlube.com/oilfield/MSDS/m_kopr.pdf |
That's right, see if you can figure how or why the compound stops the galvanic corrosion process. I'll give you a hint, do you know what an anode and a cathode is? |
|
the material has to be in conditive contact with one another. Me I would just rather use a compund that does not contain graphite. Molly grease is the Mil-spec approved grease to be used, but plain old high temp automotivre greae will work and contains no graphite. |
|
I think that the carbon in the graphite is a conductor (like spark plug wires, or carbon tracking in a distributer cap) and this allows the galvonic action to take place,,,, as opposed to a oil or grease that does not conduct. I use a product called san-chem / no-ox-id, it is used in the electronics when putting copper connecter to a steel or tinned post and it is non conductive non reactive. |
AR Sponsor