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Manganese Phosphate Barrel Finish Question
3/17/2012 10:12:47 AM
Are there any solvents that will damage the manganese phosphate finish on my barrel? Like brake cleaner, carburetor cleaner, etc? I accidentally grabbed the carburetor cleaner and got some on my barrel. It discolored it white/yellowish in a small area. I about had a heart attack. I grabbed some CLP and wiped the area and it went back to looking fine. I'm hoping I didn't do any permanent damage.
So, how tough is manganese phosphate? Tougher than the hardcoat anodizing (MIL-A-8625F, Type III, Class 2) on my lower? This is on a Bravo Company Lower and Upper.
From the BCM website:
Manganese Phosphate Barrel Finish
Barrels are parkerized with the manganese phosphate finish (Mil-Spec A-A-59267). Military specifications also state that the entire barrel surface is phosphate finished to create a porous surface to absorb oil as to resist against corrosion from the elements. BCM barrels are phosphated before installation of front sights. This is a much more extensive assembly operation, but insures that the entire barrel is finished and protected . . .even under the front sight base.
Does the above mean that I should ALWAYS CLP the outside of my barrel to protect it?
So, how tough is manganese phosphate? Tougher than the hardcoat anodizing (MIL-A-8625F, Type III, Class 2) on my lower? This is on a Bravo Company Lower and Upper.
From the BCM website:
Manganese Phosphate Barrel Finish
Barrels are parkerized with the manganese phosphate finish (Mil-Spec A-A-59267). Military specifications also state that the entire barrel surface is phosphate finished to create a porous surface to absorb oil as to resist against corrosion from the elements. BCM barrels are phosphated before installation of front sights. This is a much more extensive assembly operation, but insures that the entire barrel is finished and protected . . .even under the front sight base.
Does the above mean that I should ALWAYS CLP the outside of my barrel to protect it?
3/17/2012 10:26:36 AM
What you did was strip the surface oils from the pores of the barrel. As the BCM website states, this finish process creates a surface which absorbs and retains oil. What I like to personally do when I'm done cleaning my weapons, it apply a VERY small amount of CLP to a cheap 1" paint brush and brush the weapon down.
The brush gets into all the hard to reach areas and removes dirt, dust, ect, ect, while leaving behind a thin barrier of protection. I follow the brushing with a wipe down utilizing a black, lint free cloth. -Quib
The brush gets into all the hard to reach areas and removes dirt, dust, ect, ect, while leaving behind a thin barrier of protection. I follow the brushing with a wipe down utilizing a black, lint free cloth. -Quib
3/17/2012 11:10:35 AM
Originally Posted By QUIB:
What you did was strip the surface oils from the pores of the barrel. As the BCM website states, this finish process creates a surface which absorbs and retains oil. What I like to personally do when I'm done cleaning my weapons, it apply a VERY small amount of CLP to a cheap 1" paint brush and brush the weapon down.
The brush gets into all the hard to reach areas and removes dirt, dust, ect, ect, while leaving behind a thin barrier of protection. I follow the brushing with a wipe down utilizing a black, lint free cloth. -Quib
What you did was strip the surface oils from the pores of the barrel. As the BCM website states, this finish process creates a surface which absorbs and retains oil. What I like to personally do when I'm done cleaning my weapons, it apply a VERY small amount of CLP to a cheap 1" paint brush and brush the weapon down.
The brush gets into all the hard to reach areas and removes dirt, dust, ect, ect, while leaving behind a thin barrier of protection. I follow the brushing with a wipe down utilizing a black, lint free cloth. -Quib
Gotcha. One problem is that the barrel is under the Daniel Defense Lite rail which is attached to the receiver using 6 screws torqued to 30 ft/lbs.
3/17/2012 11:13:20 AM
I guess in that case, you have to get a little "creative".
3/17/2012 3:05:16 PM
Originally Posted By QUIB:
I guess in that case, you have to get a little "creative".
I guess in that case, you have to get a little "creative".
+1
A parkerized finish that is not oiled can rust.
3/17/2012 6:24:22 PM
Mission accomplished. I just removed the handguard and gave it a nice coating. Thanks for showing me the brush technique.
3/17/2012 7:21:19 PM
I find a shaving brush works much better.
