AK Rifles banner

Parkerizing tutorial

20K views 39 replies 20 participants last post by  Longshot1  
#1 ·
This was my first home parkerizing and wanted to share my experience with others who are looking into getting started in it. I've looked on here but never found a complete step by step tutorial so I pieced together what I had read from several posts and gave it a try.

First I'll give a list of what I used and where I got it from.

1) 2-gallons Manganese parkerizing solution (Brownells.com)
2) 2-pints Black oxide concentrate (Caswellplating.com)
3) 1-gallon Purple Power degreaser (Wal-mart)
4) 3-30"x8"x6" gray fiberglass tanks (USPlastics.com)
5) 2-40"x8"x8"x11ga stainless steel tanks w/lid (built them myself at work)
6) 1-gallon Kroil (midwayusa.com)
7) 12 oz. Atomized Steel (Brownells.com)
8) 1 small roll .35 carbon steel mig wire (brought home from work)
9) several pieces of 3/32 stainless tig wire (brought home from work)
10) 2 turkey deepfrying propane burner stands (borrowed from my parents)
11) 50LB bag Black Diamond blasting media (Tractor Supply)
12) Blast cabinet & air compressor (already had them in my garage)
13) Stainless basket for dipping small parts in park tank (built it at work)

Then a few misc. items from Wal-mart:

Thermometer (checking temp of park solution)
32 ounce plastic measuring cup (for mixing chemicals)
Spray bottle (for applying kroil)
2 stiff bristle brushes (1 for degreasing, 1 for cleaning after media blasting)
1 soft bristle brush (for cleaning after parkerizing)
2 5-gallon plastic gas tanks (for storing park solution)
1 fish tank net and 1 pack kneehigh pantyhose (I'll explain later..lol)
1 pack coffee filters (for seasoning park solution with atomized steel)
2 cans brake cleaner (degreasing parts)
1 large stainess steel spoon (for stirring solution)
1 pair rubber gloves (for keeping my hands nice and clean)
2 rolls shop towels (for cleaning up messes I'm sure I'll make lol)

Ok lets get started.

1 gallon of the park concentrate makes a little over 9 gallons of solution. I filled one of my stainless tanks with 8 gallons which was 6" deep and it left me a little over 1 gallon to top it off when it got low. I set this tank on the two propane burner stands to heat up. I stitch welded a 1/4"x4" stainless flatbar the full length of the tank to act as a diffuser plate to keep hotspots from forming in the tank. Eventually I'm going to build a stand for it with a pipe burner.

Once it reaches between 120 to 160 degrees you have to keep it at that temp for an hour to season it with the atomized steel powder. (I kept it at a constant 140 degrees while doing this.) Use 2/3 TSP of atomized steel powder per gallon of park and put it in a coffee filter. Wrap the sides up and tie it off with carbon wire. (I used the carbon mig wire and it was about the size of a golf ball.) Hang it in the solution and swish it back and forth every 5 minutes for 1 hr.

In the other stanless tank I filled it with about 8 gallons of water. I'm using this tank for cleaning the parts after they come out of the park solution.

I filled one of the fiberglass tanks with water to clean parts as they came out of the blast cabinet. Another one I filled with 5 quarts water, 2 quarts purple power to degrease parts before I blast them. The last fiberglass tank I used for the black oxide solution. I mixed 1 quart of black oxide concentrate with 9 quarts water.

While I got my other tanks ready an hour had passed and the park solution was seasoned. Then I cranked the heat up to 190 to 195 degrees.

Ok, so here is the process.

First I degreased the parts and barreled receiver in the purple power and scrubbed with a brush. I have a shower in my garage so I cleaned the parts in the tub under running water to remove the purple power. Then I sprayed them with brake cleaner to make sure I got most of the oil and grease off and blowed them dry with the air compressor.

I blasted them with the Black Diamond media and made sure to get the old finish off and leave a nice even bare finish for the park.

After i pulled the parts from the blast cabinet I blowed them off with the compressor and cleaned them with a brush in a tank of water.

I placed the small parts in the stainless basket in the park solution and used the 3/32 stainless tig wire to hang the receiver in the park tank to keep it off the bottom and sides. I let them stay in there for 10 minutes until they stopped fizzing. I shook the basket of small parts every few minutes to make sure they weren't touching eachother or the sides of the basket for too long to make sure they got parked all over.

After 10 minutes when the fizzing stopped I took them out of the solution and put them in the stainless tank of water. I scrubbed them lightly with a soft bristle brush to get any remnants of the park solution off. Then I took them out of the water, shook them off and placed them in the black oxide tank.

I left them in the black oxide solution for 10 minutes. I flipped the barreled receiver over about every 2 minutes and stirred the small parts with a stainless spoon to make sure they didn't touch the bottom for too long a period. After 10 minutes I took them out of the solution and blowed them dry with the compressor.

After drying them I sprayed them down heavily with Kroil and placed them on a piece of cardboard. I let them soak for 24 hrs before wiping them clean of excess oil.

After you wipe them down they are ready to assemble.

Here are a few pics. I took these with a cell phone so they aren't the best. I didn't plan on doing a write up or I would have taken more and used a better camera.

Here is my park tank setup.

Image


Image


Stainless basket and spoon. I welded 2 pcs of 3/8" stainless solid rod to the bottom of the basket, 1 on each end to keep it off the bottom of the tank so small parts wont warp.

Image


Some small parts in the basket.

Image


Freshly parked and ready for cleaning in water then dipped in black oxide.

Image


My blast cabinet and helper ;) I need a larger cabinet but this works for now.

Image


Update. Just picked up a 36"x24" blast cabinet at Tractor Supply today. This makes blasting barreled receivers so much easier. It's large enough to do my Tabuk, PSL and RPKs which my other cabinet wasn't.

Image


Purple power in one tank for degreasing and water in the other for cleaning blast media off parts before going into park tank.

Image


Water tank and black oxide tank.

Image


Image


A few parts soaking in kroil.

Image


Barreled receiver after its been wiped clean of excess kroil.

Image


Image


Rifle after assembly.

Image


Image


Image


Hope this has answered any questions for anyone who wants to get started in parkerizing at home.

Oh I almost forgot to explain the fish net and kneehigh stockings..lol I stretched the nylons over the fish net to make what resembles a small butterfly net to skim the park solution to remove the buildup that forms in it. The fish net by itself isn't a fine enough mesh so I used the nylons and it works great.

Image


Image


Here is the gunk buildup thats caught in the nylons.

Image


Its almost the size of a baseball.

Image


This seems to be a much easier and faster way of cleaning your park solution between uses instead of draining your tank and filtering the solution.

On a side note. The next day I noticed that the black oxide was cloudy. I think its from sitting in the fiberglass tank over night.

Image


Image


I filtered the solution through coffee filters and cleaned the tank but the bottom of the tank remained much lighter. Might be a good idea to empty your tank after each use to keep this from happening. After filtering the solution and pouring back into the tank there was no change in the blackening effects.
 
#4 ·
Great write up. thank You for taking the time to take the shots, and post it all. This is how we ALL expand the knowledge base.

I was VERY lucky many years back and knew an Army Armorer who had a parkerizing set up at his shop. I had a small array of M1 Carbines and all of mine had been well used.

Spent a day at his shop, took down all the guns, beadblasted as reqd, degreased and parkerized, oil soaked the parts, reassembled. When we were done my collection went from 6 beat up Carbines to six MINT Carbines. I also park'd a 1950's S&W M-10 four inch. Came out great.

Several years later I bought three Rem 870's from a local PD. Typical cop guns, beaten up....but shot very little. I bead blasted and parkerized, then dark grey GunCoated them. One of the guns belongs to a loocal guy and 20 years later it STILL looks good.

Parkerizing is not VOODOO. Nice to see a post that breaks it down to it's simple steps.

FN in MT
 
#5 ·
Thanks guys, I'm glad ya'll liked the write up. Parkerizing is something I wanted to get into since I have so many kits that I have built and needed refinishing. I've learned alot on this board so I wanted to give back a little knowledge to maybe help someone else out.

I also want to give credit to John Mcguire for helping me out. Some of you may know him. He's one of the top 1919A4 builders around. He built a couple 1919's for me and I was asking him about how he parkerizes them and told him I was interested in getting into it. He invited me to hang out with him one day while he parked a few builds and told me to bring a couple guns I wanted parked. He let me use his equipment and showed me how it was done and never charged me a dime. He's a hell of a nice guy and he even let me shoot a full auto CZ 24 he had just built.

So I wanna give credit to John for helping me have a better understanding of parkerizing and showing me just how easy it really is.
 
#6 ·
Nice write-up!

Did you plug the barrel with anything and if so how and with what?

Also, does the parkerizing reach areas that are covered up, like the barrel trunion, etc.?

Thank you.
 
#7 ·
santa said:
Nice write-up!

Did you plug the barrel with anything and if so how and with what?

Also, does the parkerizing reach areas that are covered up, like the barrel trunion, etc.?

Thank you.
Thanks.

No I haven't had to plug any barrels yet. All the ones I've done so far have been chrome lined bores so the parkerizing or the black oxide doesn't stick to it. The only time you would have to plug the barrel and gas block is if the barrel is not chrome lined such as a yugo or an american made barrel.

If you want to plug the bore, Brownells sells assorted sizes of rubber barrel plugs that you can use.
 
#8 ·
Nice job.
I really like the plastic pre-treat dip tanks and filter method.
I can't recall will the 8" depth let you submerse completely a 1919 receiver in the solution?

Over the years of parking, the group that I work with have found that using pipe burners will prevented flock from floating in currents and maintain even heat throughout the solution. We started using a 2 and 3 cast iron propane camp burners. You will like the pipe burner when you get around to making one. I posted a thread here on how to make a pipe burner.
We also went through a couple welded stainless tanks from heavy use then began using a diffusor plate on the bottom of the tanks and they hold up much better now. Just keep an eye on the bottom of your tank and if needed depending on usage just pick up a mild steel plate to protect the stainless tanks bottom.
We use the silicon barrel plugs on chrome lined barrels to keep them shiny, the solution will just dull the chrome.
 
#9 ·
tangotag said:
Nice job.
I really like the plastic pre-treat dip tanks and filter method.
I can't recall will the 8" depth let you submerse completely a 1919 receiver in the solution?

Over the years of parking, the group that I work with have found that using pipe burners will prevented flock from floating in currents and maintain even heat throughout the solution. We started using a 2 and 3 cast iron propane camp burners. You will like the pipe burner when you get around to making one. I posted a thread here on how to make a pipe burner.
We also went through a couple welded stainless tanks from heavy use then began using a diffusor plate on the bottom of the tanks and they hold up much better now. Just keep an eye on the bottom of your tank and if needed depending on usage just pick up a mild steel plate to protect the stainless tanks bottom.
We use the silicon barrel plugs on chrome lined barrels to keep them shiny, the solution will just dull the chrome.
Yeah 8" is deep enough for a 1919 receiver. I didn't park mine, John did after he built them.

When I get some time I'm gonna start the pipe burner. As far as a diffuser plate, I have 1/4"x4" stainless flatbar stitch welded along the bottom of the tank for use with the pipe burner. Since I'm using the stoves for now, I'm using 2 round 1/4" thick plates on top of the burners. You can see them in the first pic.
 
#10 ·
Nighthawk if you use a diffuser plate between the tank & heat source you will stop 90% of that flock from forming.The more seasoned the solution becomes the less will form.
Also the Kroil is not necessary. Use running cold water to rinse the solution from your parts, blow them off with your compressor then use WD-40. ( water displacing formula #40 ) to get rid of any excess water.
Let the fresh parked parts sit for 24 hours then wipe off the WD40 & use your gun oil of choice. Also when your park solution cools store it in sealed plastic containers. I use 5 gallon yellow plastic diesel fuel cans sold at Home Depot. Your work looks really good.
 
#11 ·
gundoc said:
Nighthawk if you use a diffuser plate between the tank & heat source you will stop 90% of that flock from forming.The more seasoned the solution becomes the less will form.
Also the Kroil is not necessary. Use running cold water to rinse the solution from your parts, blow them off with your compressor then use WD-40. ( water displacing formula #40 ) to get rid of any excess water.
Let the fresh parked parts sit for 24 hours then wipe off the WD40 & use your gun oil of choice. Also when your park solution cools store it in sealed plastic containers. I use 5 gallon yellow plastic diesel fuel cans sold at Home Depot. Your work looks really good.
I have 1/2" thick of diffuser plate under my tank. Its a 11ga tank with 1/4" stainless flatbar welded to the bottom then a 1/4" mild steal plate sitting on top of the burners so I think I'm covered. :wink:

I use kroil because its a better oil than wd40. Its a water displacing oil but it gets into all the crevises better. They don't call it "the oil that creeps" for nothing. :grin:
 
#12 ·
Looks good. Did the oxide step really darken up the manganese? I get the about the same shade you have in these pics from just using a locally mixed manganese solution then oil. It's a high concentrate though (my parts usually stop reacting in about 1 min) so this might make a difference.
 
#13 ·
j_tudeski said:
Looks good. Did the oxide step really darken up the manganese? I get the about the same shade you have in these pics from just using a locally mixed manganese solution then oil. It's a high concentrate though (my parts usually stop reacting in about 1 min) so this might make a difference.
Yeah there is a difference. I parked a spade grip and bipod for a 1919 and its a gray color. The pics don't do it justice cause the flash washes it out and makes the black look lighter than what it is in person. I think the oxide is well worth it to get the color jet black.
 
#14 ·
Looks really good. I didn't know the Mag Phos wasn't totally black after applying oil finish. Good to know. I am getting ready to do my first park as well and thought I might add some questions to your thread. Below is my ebay special 3 burner setup I built some steel legs for. Makes for a great camping stove too :) Question, is my "stove top" have plenty of temp difussing cast iron?
Image


If not do you think some mess steel like this might make for a good diffuser between burners and tank?
Image


Is it really necessary to rinse in a stainless tank port post park? I thought I might set something up with an overflow tube in my garage sink keep the water cycling as it dilllutes the park solution (long with a little soft scrubbing of course. I do understand my sink would have to be very clean prior to putting anything in it.
Image


Her is a shot of my park tank (6X6X40) purchased off of ebay. Came with drain plug too... nice :)
Image


Great write up and thanks for the tips :) Oh ya, where did you get the barrel brakes? Really like that style over the AMD-65 one I have. Thanks/
Bill
 
#15 ·
Hi Bill, looks like you've got a nice setup started. To answer your questions, a diffuser plate is a solid plate between the fire and your stainless tank so the expanded metal wont work. Try and find some 3/8"x6" mild steel flatbar the length of your burner. Then just lay it across your stove and sit your tank on top of it and you should be fine.

Your wash tank doesn't have to be stainess, I was just using up a sheet of stainless I had. Your sink will be just as good.

The flash hider is from Nodak Spud. It was for the Tabuk clone rifles but I liked the way it looked so I bought a few of them.

Good luck on your parkerizing and post some pics when you're done so we can check it out.
 
#17 ·
1) 2-gallons Manganese parkerizing solution (Brownells.com)
2) 2-pints Black oxide concentrate (Caswellplating.com)
Nighthawk,

I spoke with the owner of the solutions company from where I buy my concentrated parks. My intention was to inquire about any products they offer that would get a darker color from their Mang Phos solution. His answer was "Just mix a heavier concentration and cook at a higher temp." Then he tried to sell me some dark oil product. When I inqiured about the black oxide technique, he laughed at me and said Mang is a caustic reaction while the BO is an acidic reaction. This guy not know his stuff or did I miss something? Did you do both together or one and then the other? Thanks.
 
#18 ·
If you want a Black Park use:
The Lauer's black dip pre-solution, really works well.
http://www.lauerweaponry.com/item-detai ... N=66089849
Member Jerod here has parked his Sig 226 slide using this solution and it's just as Black as my Sig 226 in KG GunKote AK Black.

If you want a Green park we have had luck using a Zinc park and baking in cosmoline over a few days in the oven. The park turns more Green in color like you see on parkerized stored mint Garands at the gun shows.

I found the old Pipe Burning Thread too.
 
#19 ·
tangotag said:
If you want a Black Park use:
The Lauer's black dip pre-solution, really works well.
http://www.lauerweaponry.com/item-detai ... N=66089849
Member Jerod here has parked his Sig 226 slide using this solution and it's just as Black as my Sig 226 in KG GunKote AK Black.

If you want a Green park we have had luck using a Zinc park and baking in cosmoline over a few days in the oven. The park turns more Green in color like you see on parkerized stored mint Garands at the gun shows.

I found the old Pipe Burning Thread too.
I like the pre-dip stuff but it says no pre-heating necessary. But for parking you want the substrate (whatever your are parking) at park temps prior to dip, no? Any issues here?

Just asking... I am a newb and am learning here so I apprecaite the feedback and patience. Also, if anybody has any side by side use of Mang park with and without black oxide treament I'd like to see it. I have several theme's I'm working on. One is all black so the black oxide may be definitely in there. But I have a coupld of AMD-65's I'm playing with. As close to black is good enough for these... just looking for protection more than ahything else.
Thanks guys :)
 
#20 ·
j_tudeski said:
1) 2-gallons Manganese parkerizing solution (Brownells.com)
2) 2-pints Black oxide concentrate (Caswellplating.com)
Nighthawk,

I spoke with the owner of the solutions company from where I buy my concentrated parks. My intention was to inquire about any products they offer that would get a darker color from their Mang Phos solution. His answer was "Just mix a heavier concentration and cook at a higher temp." Then he tried to sell me some dark oil product. When I inqiured about the black oxide technique, he laughed at me and said Mang is a caustic reaction while the BO is an acidic reaction. This guy not know his stuff or did I miss something? Did you do both together or one and then the other? Thanks.
Yes you first park, then wash in water, then dip in black oxide. You do not mix the 2 chemicals together.
 
#21 ·
tangotag said:
If you want a Black Park use:
The Lauer's black dip pre-solution, really works well.
http://www.lauerweaponry.com/item-detai ... N=66089849
Member Jerod here has parked his Sig 226 slide using this solution and it's just as Black as my Sig 226 in KG GunKote AK Black.

If you want a Green park we have had luck using a Zinc park and baking in cosmoline over a few days in the oven. The park turns more Green in color like you see on parkerized stored mint Garands at the gun shows.

I found the old Pipe Burning Thread too.
Tangotag, thanks for adding this info. So far I've done 9 rifles and have about 12 more to go and have more than enough solution to finish them and then some so its not worth it to me to buy more solution but for someone else wanting a jet black finish this sounds like something worth trying.
 
#22 ·
Ok Bill, here are some comparison pics I took today. It was cold and dreary out so I didn't stay out there long and the sun wasn't out but I took a few to give you an idea of the difference.

The 1919A4 and Yugo RPK are manganese only. The Tabuk is manganese with black oxide.

Image


Image


Image


Image


Image


In this pic the finish doesn't look smooth. Its small cotton fibers all over the receiver from when I wiped it down with a oil soaked rag. Its actually a very smooth, even finish.

Image
 
#23 ·
Nighthawk
Nice pics, I love the 1919A4 & bipod.

Bill
For using the pre-dip blackening solution just pour in a plastic tub like Nighthawk has his degreasing solution in. It has a warning against using it in a stainless steel container. It is at room temp just dip before the parkerizing step. As far as I can tell it is an etching solution that results in a black finish no matter if you have Zinc or Manganese park. I think getting a MSDS sheet on it would explain more.

I read years back but I can't recall what chemical was used for the pre-dip before Lauer's came out with their jug. If I find it I will update the thread.

For another spin on parking. There was suspicions that the Romanians dipped their fresh parked AKs in a cold blue type mix to achieve the black darkening to their park.
 
#26 ·
I have parkerized and Gunkoted many 100's of firearms over the years and only recently began using the black pre dip. If you use Black oxide or the pre dip the end color seems to look close to jet black . Nighthalk I must say your work is very detailed and nice ! Where did you find those plastic tanks ? I have been looking for some of those size for 5 plus years ! Nice work and please let me know ! Jerod