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Rust stain removal on concrete? #4686702
03/06/18 08:31 PM
03/06/18 08:31 PM
Joined: Nov 2009
Posts: 5,222
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,222
Houston, Texas
I'm going to be pressure washing a driveway tomorrow and it has a few time sized rust spots from fertilizer and probably rebar. I have a 4000psi power washer. Will this do the job or is their something else I can use to take the rust off.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4686717
03/06/18 08:36 PM
03/06/18 08:36 PM
Joined: Dec 2016
Posts: 8,039
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,039
Waco, TX
Originally Posted By: motor_oil_madman
I have a 4000psi power washer. Will this do the job?


Yes, probably

If it doesn't - try a little bit of VERY diluted muriatic acid after pressure washing it


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4686736
03/06/18 08:52 PM
03/06/18 08:52 PM
Joined: Nov 2009
Posts: 5,222
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,222
Houston, Texas
If it only takes a little bit of acid. I wonder if coca cola would be enough. Just get a 20 oz bottle then pour on the rusty areas and let.ot soak until I get to it with the pressure washer.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4686828
03/06/18 09:49 PM
03/06/18 09:49 PM
Joined: Jul 2010
Posts: 20,413
PNW
ZeeOSix Offline
ZeeOSix  Offline

Joined: Jul 2010
Posts: 20,413
PNW
I've got some rust stains from moss killer. If the Coca Cola works, let us know.

Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4686938
03/06/18 11:22 PM
03/06/18 11:22 PM
Joined: Aug 2008
Posts: 3,475
Where the wind comes sweepin'
Reddy45 Offline
Reddy45  Offline

Joined: Aug 2008
Posts: 3,475
Where the wind comes sweepin'
4000psi will take care of it. My 3200psi cleans rust just fine (with the proper nozzle).

Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4686987
03/07/18 12:20 AM
03/07/18 12:20 AM
Joined: Feb 2014
Posts: 2,791
workbench CZ-USA KS KC
Marco620 Offline
Marco620  Offline

Joined: Feb 2014
Posts: 2,791
workbench CZ-USA KS KC
ExtraMuscle degreaser or TSP maybe.


15' Civic 1.8 i-vtec 222,222+ mi Redline oil/cvt fluid & Archoil9100
Just say no to drugs, union made cars and amsoil.
Son of a Navy Corpsman. Support vets!


Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4687065
03/07/18 07:04 AM
03/07/18 07:04 AM
Joined: Mar 2011
Posts: 383
Midwest
Sonic Offline
Sonic  Offline

Joined: Mar 2011
Posts: 383
Midwest
I've used IRON OUT outdoor formula to clean rust stains from concrete as well as composite decking. Works well.

Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4687067
03/07/18 07:06 AM
03/07/18 07:06 AM
Joined: Jul 2005
Posts: 31,705
NY
demarpaint Offline
demarpaint  Offline

Joined: Jul 2005
Posts: 31,705
NY
I've cleaned a lot of rust stained patios in my day. A bit of muriatic acid and a good pressure washer worked very well for me.


God Bless Our Troops

Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4687113
03/07/18 08:11 AM
03/07/18 08:11 AM
Joined: Mar 2017
Posts: 92
Philadelphia PA
SKVenture Offline
SKVenture  Offline

Joined: Mar 2017
Posts: 92
Philadelphia PA
If you use the muriatic acid, be sure to flush the area with low pressure water either with a pail or a garden hose. You donít want to stuff splashing all over you when you hit it with a power washer!

Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4687142
03/07/18 08:47 AM
03/07/18 08:47 AM
Joined: Aug 2017
Posts: 643
Nebraska
BJD78 Offline
BJD78  Offline

Joined: Aug 2017
Posts: 643
Nebraska
I like a few rust and oil stains on my driveway, gives it character. Over time the duo of sun shine and rain will fade the stains naturally.


2010 Forester:122K
2009 Sonata :189K

OCI 5K using TSC conventional Travelers oil.
Re: Rust stain removal on concrete? [Re: motor_oil_madman] #4687289
03/07/18 10:44 AM
03/07/18 10:44 AM
Joined: Jun 2003
Posts: 5,979
Illinois
SHOZ Offline
SHOZ  Offline

Joined: Jun 2003
Posts: 5,979
Illinois
Citric Acid is a great rust buster.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
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