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need something to dissolve rust flecks on rawsteel #3148811
10/08/13 05:03 AM
10/08/13 05:03 AM
Joined: Oct 2004
Posts: 3,753
Michigan
dwcopple Offline OP
dwcopple  Offline OP
Joined: Oct 2004
Posts: 3,753
Michigan
I have a machined piece of steel "in the white" that has some small rust flecks over it. I tried mineral spirits and 0000 steel wool and it just lightened it a bit. what should I use?


2017 RAM Big Horn 4x4 3.6L V6
2011 Chrysler 200 Limited 3.6L V6
Re: need something to dissolve rust flecks on rawsteel [Re: dwcopple] #3148814
10/08/13 05:08 AM
10/08/13 05:08 AM
Joined: Oct 2012
Posts: 128
Michigan
Jay1981 Offline
Jay1981  Offline
Joined: Oct 2012
Posts: 128
Michigan
I've used vinegar to soak tools with rust on them. It works well but then they need a light coat of oil or they rust again.


Formerly "T4R"
2007 Chrysler T&C Touring, 98k
2010 Ford F-150 STX, 76k
Re: need something to dissolve rust flecks on rawsteel [Re: dwcopple] #3148825
10/08/13 05:27 AM
10/08/13 05:27 AM
Joined: May 2012
Posts: 2,557
Indiana
Phishin Offline
Phishin  Offline
Joined: May 2012
Posts: 2,557
Indiana
Vinegar works well. And yes, oil or prime/paint immediately....acid will activate the metal to quickly rust again.


2018 Chevy Silverado 3500HD 6.0L Gas: RLI 10w30
2010 Accord-LX K24: MaxLife 5w30 + Torco MPZ
2014 CR-V LX K24: M1 0w30
Re: need something to dissolve rust flecks on rawsteel [Re: dwcopple] #3148895
10/08/13 07:05 AM
10/08/13 07:05 AM
Joined: Apr 2010
Posts: 1,084
Ontario , Canada
nitehawk55 Offline
nitehawk55  Offline
Joined: Apr 2010
Posts: 1,084
Ontario , Canada
phosphoric acid


05 Ford Five Hundred AWD 3.0 DOHC V6 CVT tranny
Re: need something to dissolve rust flecks on rawsteel [Re: nitehawk55] #3148951
10/08/13 08:14 AM
10/08/13 08:14 AM
Joined: Jan 2008
Posts: 11,084
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 11,084
OH

Re: need something to dissolve rust flecks on rawsteel [Re: dwcopple] #3148953
10/08/13 08:18 AM
10/08/13 08:18 AM
Joined: Dec 2002
Posts: 42,455
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,455
New Jersey
Naval Jelly?

Re: need something to dissolve rust flecks on rawsteel [Re: nitehawk55] #3148961
10/08/13 08:26 AM
10/08/13 08:26 AM
Joined: May 2012
Posts: 2,557
Indiana
Phishin Offline
Phishin  Offline
Joined: May 2012
Posts: 2,557
Indiana
Originally Posted By: nitehawk55
phosphoric acid


Regular Coca Cola.


2018 Chevy Silverado 3500HD 6.0L Gas: RLI 10w30
2010 Accord-LX K24: MaxLife 5w30 + Torco MPZ
2014 CR-V LX K24: M1 0w30
Re: need something to dissolve rust flecks on rawsteel [Re: JHZR2] #3148962
10/08/13 08:27 AM
10/08/13 08:27 AM
Joined: Apr 2010
Posts: 13,537
Chicago, IL
dparm Offline
dparm  Offline
Joined: Apr 2010
Posts: 13,537
Chicago, IL
Originally Posted By: JHZR2
Naval Jelly?



Bingo. You need to neutralize the rust, but you must paint over it immediately or the rust will just come back.


2017 Chevrolet Corvette Grand Sport
Re: need something to dissolve rust flecks on rawsteel [Re: dwcopple] #3148965
10/08/13 08:38 AM
10/08/13 08:38 AM
Joined: Jan 2004
Posts: 5,956
northern Alabama
benjamming Offline
benjamming  Offline
Joined: Jan 2004
Posts: 5,956
northern Alabama
Naval jelly has phosphoric acid - up to 30% along with a small amount of sulfuric acid (think pickling).

Are you experience flash rust on the part?

Re: need something to dissolve rust flecks on rawsteel [Re: dwcopple] #3149378
10/08/13 02:42 PM
10/08/13 02:42 PM
Joined: Oct 2004
Posts: 3,753
Michigan
dwcopple Offline OP
dwcopple  Offline OP
Joined: Oct 2004
Posts: 3,753
Michigan
used CLR and it darkened the metal significantly frown Now what?


2017 RAM Big Horn 4x4 3.6L V6
2011 Chrysler 200 Limited 3.6L V6
Re: need something to dissolve rust flecks on rawsteel [Re: dwcopple] #3149724
10/08/13 08:15 PM
10/08/13 08:15 PM
Joined: Oct 2004
Posts: 3,753
Michigan
dwcopple Offline OP
dwcopple  Offline OP
Joined: Oct 2004
Posts: 3,753
Michigan
I wiped of the blackish residue and wiped it down with Ed's Red. I just took it out and dunked it in my used engine oil and am letting it drip dry back into the bucket overnight. Tomorrow I'll brush it off with some kerosene and a parts brush. Then it should be good to go I guess.


2017 RAM Big Horn 4x4 3.6L V6
2011 Chrysler 200 Limited 3.6L V6
Re: need something to dissolve rust flecks on rawsteel [Re: dwcopple] #3150001
10/09/13 07:57 AM
10/09/13 07:57 AM
Joined: May 2012
Posts: 2,557
Indiana
Phishin Offline
Phishin  Offline
Joined: May 2012
Posts: 2,557
Indiana
CLR created oxides on the metal. That's why it darkened up.

Why not degrease the part, and immediately slap some primer on it....and then put whatever paint/finish you want on it?

My favorite rust preventor is Phosphoric Acid with Zinc Oxide dissolved in it. I make my own. But POR 15 makes it as well. The acid eats away the rust, and the zinc deposits on the iron (which forms a galvanic-like coating on the steel). This prevents rusts from forming by "sealing" it off, and the zinc is sacrificial to the iron.

Then paint immediately once dry. POR15 has an excellent paint product as well.


2018 Chevy Silverado 3500HD 6.0L Gas: RLI 10w30
2010 Accord-LX K24: MaxLife 5w30 + Torco MPZ
2014 CR-V LX K24: M1 0w30
Re: need something to dissolve rust flecks on rawsteel [Re: Phishin] #3150800
10/09/13 10:01 PM
10/09/13 10:01 PM
Joined: Feb 2012
Posts: 318
Wi
wally6934 Offline
wally6934  Offline
Joined: Feb 2012
Posts: 318
Wi
Originally Posted By: Phishin
My favorite rust preventor is Phosphoric Acid with Zinc Oxide dissolved in it. I make my own. But POR 15 makes it as well. The acid eats away the rust, and the zinc deposits on the iron (which forms a galvanic-like coating on the steel). This prevents rusts from forming by "sealing" it off, and the zinc is sacrificial to the iron.

Then paint immediately once dry. POR15 has an excellent paint product as well.


Can you share your top secret procedure for making the generic Por-15. Also does it have a shelf life.

Re: need something to dissolve rust flecks on rawsteel [Re: Phishin] #3150894
10/10/13 05:06 AM
10/10/13 05:06 AM
Joined: Oct 2004
Posts: 3,753
Michigan
dwcopple Offline OP
dwcopple  Offline OP
Joined: Oct 2004
Posts: 3,753
Michigan
Originally Posted By: Phishin

Why not degrease the part, and immediately slap some primer on it....and then put whatever paint/finish you want on it?
because it is a moving part on a rifle


2017 RAM Big Horn 4x4 3.6L V6
2011 Chrysler 200 Limited 3.6L V6
Re: need something to dissolve rust flecks on rawsteel [Re: Phishin] #3269660
02/03/14 09:40 PM
02/03/14 09:40 PM
Joined: Apr 2004
Posts: 3,680
los angeles
daves66nova Offline
daves66nova  Offline
Joined: Apr 2004
Posts: 3,680
los angeles
Originally Posted By: Phishin

My favorite rust preventor is Phosphoric Acid with Zinc Oxide dissolved in it. I make my own.
Can you share your top secret procedure for making the generic Por-15. Also does it have a shelf life.


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