You may want to call or write for the catalogues of the following
companies.
CRC Industrial Products
For U.S.  800-556-5074
Division Headquarters is  Northeastern Sales Office
International Sales Office
885 Louis Drive
Warminster PA 18974
(215) 674-4300 telephone
FAX (215) 674-2207
   Ask about their SP400 Indoor/Outdoor longterm corrosion inhibitor

Also contact  Mirachem Corporation
1045 South Edward Drive
Tempe ,Arizona 85281
800--847-3527
FAX 602-966-0890
The product catalogue I have is for products that remove rust but they
may have a stabilizer that arrests the corrosion and maintains the
appearance you want
Good luck

> -----Original Message-----
> From: Peter Rebernik [SMTP:[log in to unmask]]
> Sent: Thursday, June 25, 1998 5:20 AM
> To:   [log in to unmask]
> Subject:      Rusty Tanks
> 
> We (small Austrian museum) are concerned about our huge (about 10
> meters high), round tanks (old containers for liquids). They were used
> originally for the paper industry. They look beautifully: brown,
> rusty, with decaying colors etc. They must stand in the open air (no
> building around to preserve them).
>  
> We would like to preserve them as they are now: so rusty, so age-old
> looking. 
>  
> Question: Are there methods to your knowledge on how to (1) stop the
> rusting process and (2) preserve the "looks" of the tanks.
>  
> If we cannot find a suitable method, we would have to clean them via
> sandblasting. Then they would look new and neat - but that's not the
> intention.
>  
> Thanks in advance
>  
> Peter, the Rebernik
> 
> +---------------------------------------------------
> | PHAROS International - Bureau for Cultural Projects
> | Peter Rebernik, Dipl.-Ing.
> | Anton Baumgartnerstr. 44/C2/3/2; A-1230 Wien / AUSTRIA
> | Tel.: (... 43 1) 667 7375; Fax: (... 43 1) 667 2984
> | Mobiltel.: (... 43 664) 230 2767
> | E-Mail: [log in to unmask] <mailto:[log in to unmask]> ; Web:
> http://www.rebernik.at 
> +------------------------------------------------------