Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Rust Removal


ambler

Recommended Posts

I have a couple tanks to clean up. I bought some Exrust from Kanolabs makers of kroil. Anyone have experience with it? Whats in it?
Link to comment
Share on other sites

Ambler, The MSDS on it says 20-40% phosphoric acid, emulsifier 5-10%, wetting and cleansing agents 1-5%, inert non hazardous 40-60%, proprietary 5-10% They claim that with little cleanup your ready to prime, and I've found that to be true, just don't let it dry or your in for much more work. I've found the easiest way to use it is mix a solution, and immerse whatever your removing rust from. Then immediately rinse and your done. Also, if somethings a little greasy or oily it cuts that too. How about a solution poured right in the tank? It works in a few hours too, by the way, you can see it happening. Before and after pics possible? Good luck!
Link to comment
Share on other sites

Yep, it does, I usually scrub after rinsing thoroughly. Gloves are a must, its nasty on your skin. I'm wondering if it reacts with carbon (surface migration?) to produce the grey film.. Maybe I'll play with different steels to see the effect.
Link to comment
Share on other sites

Phosphoric acid chemically reacts with rust (iron oxide) to form iron phosphate (a rust inhibitor), which is a protective coating. This may be the gray coating you are talking about. If so, then you probably don't want to try and remove it. Just paint over it. The washing with water is a way of neutralizing the acid to stop any additional chemical reaction and make the part safe to handle. This is my opinion, but I am not a chemist, so use accordingly.
Link to comment
Share on other sites

Ambler, I am a proponent of phosphoric acid based rust removers/converters. Others in the club are not. Rod is correct in that unlike other acids, P.A. leaves a film of iron phosphate which is a natural rust inhibitor. Hydrochloric acid (muriatic acid) is much too harsh on iron based materials on the other hand. Leave the grey iron phosphate coating there; maybe sand it smooth first before painting. Tom(PK)
Link to comment
Share on other sites

Tom(PK), I'm with you on the use of phosphoric acid. I like it and have used it successfully for years. Nice to know someone else uses the stuff. Cheers,
Link to comment
Share on other sites

Actually the rust is inside the gas tanks. I plan to do a gross clean out, then fill them up for three hours, pour the solution into next tank and hose them out. No painting yet. I will use it for deck preping this spring fefore primaring.
Link to comment
Share on other sites

Phosphoric acid may be used by direct application to rusted iron or steel tools or surfaces to convert iron oxide (rust) to a water soluble phosphate compound. It is usually available as a greenish liquid, suitable for dipping (acid bath), but is more generally used as a component in a gel, commonly called Naval jelly. As a thick gel, it may be applied to sloping, vertical, or even overhead surfaces. Care must be taken to avoid acid burns of the skin and especially the eyes, but the residue is easily diluted with water. When sufficiently diluted can even be nutritious to plant life, containing the essential nutrients phosphorus and iron. It is sometimes sold under other names, such as "rust remover" or "rust killer". It should not be directly introduced into surface water such as creeks or into drains, however. After treatment, the reddish-brown iron oxide will be converted to a black iron phosphate compound that may be scrubbed off. Multiple applications may be required to remove all rust. The resultant black compound does not provide any further corrosion resistance (such protection is somewhat provided by the superficially similar Parkerizing process). After application and removal of rust using phosporic acid compounds the metal should be oiled (if to be used bare, as in a tool) or appropriately painted, most durably by using a multiple coat process of primer, intermediate, and finish coats.
Link to comment
Share on other sites

Guest
This topic is now closed to further replies.
  • Who's Online (See full list)

    • Robert A McNaughton
  • Recent Status Updates

    • gwiseman

      gwiseman

      As you know SimpletrACtors.com has changed some recently. Working through this so PM me with questions, suggestions, and/or challenges you have. Appreciate your patience and feedback.
      · 0 replies
    • gwiseman

      gwiseman

      Site programming updates were made 3/23/2024. As a result some things have changed including dues payment options. We will continue maintenance and work with technicians to regain credit card payment option and clear up minor challenges. On positive it appears attaching pictures is now easier. Good day. Gene 
      · 1 reply
  • Adverts

×
×
  • Create New...