Acid Cleaner 390


Acid Cleaner 390 is a liquid non-electrolytic acid derusting compound for chemically removing rust and scale from ferrous metals.  Acid Cleaner 390 is completely safe to use on all steel parts, as there is no attack or hydrogen embrittlement of the metal itself.


Acid Cleaner 390 can be applied using standard spray washing equipment.




1.       Make up a 10-50% solution of Acid Cleaner 390 depending on amount of rust or scale to be removed.

2.       Spray the parts with Acid Cleaner 390.

3.       Let stand 5 - 10 minutes.

4.       Spray parts again.

5.       Apply Fe phosphate or other desired coating.




            1.  Take a 5 ml sample of the bath.

            2.  Add 50 mls of D.I. Water

            3.  Add 3-4 drops of phenolphthalein. 

            4.  Titrate with 1.0 N Sodium Hydroxide until the solution changes from clear to pink.


Calculation:  mls 1.0 N Sodium Hydroxide x 1.639= % Acid Cleaner 390.


Read Material Safety Data Sheet before using this product.



The information presented herein, while not guaranteed, is to the best of our knowledge true and accurate.  No warranty or guarantee expressed or implied is made regarding the performance of any products, since the manner of use is beyond our control.  No suggestion for product use or anything contained herein, shall be construed as a recommendation for its use in infringement of any existing patent and we assume no responsibility or liability for operations which do infringe any such patents.  The above includes confidential and proprietary information of So Clean Solutions and is furnished to you for your use solely on products or processes supplied by us to you.


Product Data Sheet/KB023                                                     Effective Date: 06-07-07                                         Supersedes: 5-19-03