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02-04-2019, 06:48 PM
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Join Date: Oct 2014
Posts: 166
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Making Steel Rust
Anyone ever make steel rust on purpose before?
Making a pig roaster/bbq and I have a weeping willow/bullrush design on the back that I want to rust as the finish for it. The rest of the bbq is painted with high temp paint.
Just looking if anyone has done this before. Many different ways o the Google machine.....looking for some first hand knowledge.
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02-04-2019, 06:51 PM
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Banned
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Join Date: Aug 2007
Location: Foothills
Posts: 2,337
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I use muratic acid and hydrogen peroxide. Google that combo and there are lots of videos and information on it.
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02-04-2019, 06:51 PM
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Join Date: Aug 2007
Posts: 168
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Salt and water
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02-04-2019, 06:54 PM
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Join Date: Oct 2014
Posts: 166
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Salt and water would take too long.
Looking for something that is fast acting I should of stated.
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02-04-2019, 06:55 PM
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Banned
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Join Date: Aug 2007
Location: Foothills
Posts: 2,337
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Quote:
Originally Posted by OpenSights
Salt and water would take too long.
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Exactly
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02-04-2019, 06:59 PM
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Join Date: Mar 2013
Location: Nanton
Posts: 82
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Vinegar
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02-04-2019, 07:04 PM
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Join Date: Oct 2014
Posts: 166
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Where do you get muratic acid? What's it's normal Use?
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02-04-2019, 07:07 PM
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Banned
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Join Date: Aug 2007
Location: Foothills
Posts: 2,337
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Quote:
Originally Posted by Pheasant buster
Vinegar
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Vinager removes rust.
https://m.youtube.com/watch?v=TlcL_vHODkc
You can get muratic acid at lots of places, Canadian tire, Home Depot, Lowe’s. It is used for etching concrete.
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02-04-2019, 07:21 PM
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Join Date: Mar 2013
Location: Nanton
Posts: 82
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02-04-2019, 07:24 PM
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Banned
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Join Date: Aug 2007
Location: Foothills
Posts: 2,337
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Quote:
Originally Posted by Pheasant buster
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I’ve tried it lots, muratic acid works 100x better.
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02-04-2019, 07:27 PM
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Join Date: Dec 2009
Location: southern alberta
Posts: 2,245
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Quote:
Originally Posted by Pheasant buster
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This
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02-04-2019, 07:44 PM
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Banned
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Join Date: Dec 2013
Posts: 1,509
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Quote:
Originally Posted by OpenSights
Where do you get muratic acid? What's it's normal Use?
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Hydrochloric acid can be purchased at concrete supply stores, such as Unicon, National, etc.
The project sounds quite interesting. Pictures would be great OP!
Bare Corten steel would make an interesting material for an outdoor oven
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02-04-2019, 07:47 PM
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Join Date: Mar 2008
Posts: 2,072
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In my experience vinegar will darken the metal or etch it and slowly rust it.
Salt water will rust it just takes longer.
If i needed to rust something faster, muratic acid would be my go to.
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02-04-2019, 08:15 PM
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Join Date: Feb 2015
Location: Minnesota
Posts: 617
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Vinegar
__________________
winner of the first annual CoyoteHunter.net tournament seiries.
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02-04-2019, 08:23 PM
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Join Date: May 2007
Location: SE, Saskatchewan
Posts: 671
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Seems like the heavy salt water in the Oil formations can rust something overnight. Trymore salt.
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02-04-2019, 08:33 PM
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Join Date: Oct 2014
Posts: 166
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I'll give the muratic acid a try.
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02-04-2019, 08:37 PM
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Join Date: Jan 2012
Location: Calgary
Posts: 1,559
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theres always electrolysis if you need a do over
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02-04-2019, 09:51 PM
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Join Date: May 2014
Posts: 1,670
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horse pee.
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02-04-2019, 09:52 PM
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Join Date: Jul 2007
Posts: 6,849
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Ask the city of Calgary what they put on the roads, it sure rusts my truck fast
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02-04-2019, 10:40 PM
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Banned
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Join Date: Sep 2013
Posts: 838
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Try Coca Cola
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02-04-2019, 10:57 PM
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Join Date: Nov 2016
Posts: 766
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Muratic acid if I remember correctly was used to strip anti fouling pain. Marine shop is where I got mine, 15 years ago
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02-04-2019, 11:29 PM
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Join Date: May 2013
Posts: 3,222
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nitric acid fumes will rust any bare metal right quick and in a hurry.
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02-05-2019, 12:04 AM
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Join Date: Jul 2009
Posts: 890
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Salt doesn't make anything rust, it is only an electrolyte which means it let's electrons flow through it, but it is necessary for corrosion(rust). The normal "rust" we see if oxygen corrosion. Typical oilfield corrosion is hydrogen sulfide or carbon dioxide corrosion. Both of which need a electrolyte ("salt" in the brine or produced water) for corrosion to occur. When dissolved in water, H2S and CO2 form acid which cause the corrosion.
Any strong acid or base can cause corrosion, hence the corrosive warning labels on the bottles. Some will do it faster and other slower depending on the composition of your metal.
Corrosion is a huge, huge, huge industry. Easily billions if not trillions of dollars.
__________________
"I'll give you my gun when you take it from my cold, dead hands" - Charlton Heston, 1923-2008
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02-05-2019, 12:35 AM
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Join Date: Mar 2016
Posts: 584
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Quote:
Originally Posted by calgarychef
Ask the city of Calgary what they put on the roads, it sure rusts my truck fast
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Calcium chloride
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02-05-2019, 07:30 AM
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Join Date: Jan 2009
Location: Tilley Alberta
Posts: 322
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Use ferric chloride. Its much less dangerous to work with. Muratic will rust everything in your shop. I use ferric to etch my Damascus blues or for patina on a carbon blade.
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02-05-2019, 07:48 AM
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Join Date: Apr 2018
Location: Calgary
Posts: 1,829
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Painting the BBQ and then sandblasting the pattern using a stencil works well if you're looking for a consistent rust colour over time. Leaving the mill scale on and using acid or other agent can give you some variations if that's what you're looking for. Not sure exactly what design you're looking for, but using a stencil in any event would be a good thing IMO using a small synthetic brush for application.
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02-05-2019, 10:01 AM
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Join Date: May 2013
Posts: 3,222
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Quote:
Originally Posted by Boatbuilder
Use ferric chloride. Its much less dangerous to work with. Muratic will rust everything in your shop. I use ferric to etch my Damascus blues or for patina on a carbon blade.
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Ferric chloride is only muratic or hydrocloric acid almost saturated with iron.
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02-05-2019, 10:48 AM
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Join Date: Aug 2017
Location: Edmonton
Posts: 294
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If you haven't built it yet, use Corten Steel when you do. Corten (also called weathering steel) is made to rust. If you need some, send me a PM, I can probably get you some fairly cheap.
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I am unique! Just like everybody else.
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02-05-2019, 10:51 AM
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Join Date: Sep 2016
Posts: 103
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**** on it
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