Greetings Mpkearns:
A short article at http://www.msue.msu.edu/msue/imp/mod02/01500109.html
titled "Concrete-Characteristics and Cleaning" suggests "a hot
solution
of 2 to 2 1/2 ounces washing soda or 1/2 ounce trisodium phosphate
(for example Spic and Span) per gallon of water."
I then searched for "washing soda" and located this information at
http://www.care2.com/channels/solutions/home/440 :
"Washing soda--sodium carbonate--is in the same family as baking soda.
It has just been processed differently. It is much more
caustic/alkaline, with a pH of 11, and while it doesn't give off
harmful fumes, you do need to wear gloves. It is found in the laundry
section of most supermarkets. Arm & Hammer is one brand; Shop and Save
has a generic house brand."
It may be that your friend meant washing soda instead of baking soda.
The recommendations there include a suggested solution for cleaning.
Also, at the site at http://doityourself.com/brick/concrete.htm it is
suggested for rust "Apply a hot solution of 2 to 2 1/2 ounces washing
soda or 1/2 ounce TSP (tri-sodium phosphate) per gallon of water. TSP
can be found in paint, hardware and home center stores."
*********
I also located a few other methods and products for your
consideration:
On a thread at Bob Vila's website, the following methods are
suggested:
** SAFE n' EASY Rust Remover by Dumond Chemicals
** naval jelly and a steel brush
** "Naval Jelly, or anything that has Oxycilic Acid in it. A few
products you can get at the store are ZUD (Z-U-D), and Barkeeper's
Friend."
You may view the thread at
http://www.bobvila.com/wwwboard/messages/26495.html
*********
From an article at the Washington Post at
http://www.washingtonpost.com/wp-srv/homeandgarden/housecleaning/hc_floor_rustconcrete.html
lists Oxalic acid, Rust Spotter, Trisodium phosphate (TSP) and suggest
trying a plumber's compound called Iron Out.
*********
At http://www.sting-ray.com/wackyuses/board/msgs/14124.html it is
recommended to use Barkeeper's Friend.
*********
The website at http://irc.nrc-cnrc.gc.ca/cbd/cbd153e.html recommends
(for iron rust):
** Iron rust, light - Oxalic acid, ammonium bifluoride; 10 per cent
muriatic acid; phosphoric acid
** Iron rust, deep - Poultice of whiting, sodium or ammonium citrate
and glycerine; poultice of sodium hydrosulphite and fuller's earth.
*********
A product for removing rust called "Polly's 1" is for sale at
http://www.pollyproducts.biz/
*********
Regarding references to baking soda, muriatic acid is recommended to
clean tile and masonry at
http://www.aldonchem.com/popup-ab-clean-rust.htm - The site also
suggests using a product called Grout Bright and then sealing the
concrete afterwards.
*********
This is from http://www.s-t.com/daily/09-99/09-26-99/f04ho213.htm
"Another excellent product for the removal of concrete rust stains is
Whink Rust & Iron Stain Remover, a multipurpose powder that routs rust
from almost any surface except marble. It is recommended for concrete,
stone and brick surfaces and is marketed by Whink Products Co., P.O.
Box 230, Eldora, IA 50627; phone (800) 247-5102."
*********
If you require any clarification of the links or information I have
presented, please request it before rating and closing your question
and I will be happy to respond.
Best regards,
journalist-ga
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