[TowerTalk] Rust & paint

[Mike Reublin NF4L]

Thanks Mickey. Sounds like Reformer or Ospho is a step up from the cold galvanizing coatings. The rust in question is light surface stuff.

Mike NF4L

On Dec 2, 2013, at 10:21 AM, Mickey Baker <fishflorida at gmail.com> wrote:

> You have several answers, but they don't seem to answer your question directly.
> 
> From Rustoleum's MSDS from the product, http://www.rustoleum.com/MSDS/ENGLISH/3575402.PDF, it appears that it uses tannic acid as a rust conversion compound.
> 
> This is safe for consumer use and does something different than a "cold galvanizing" coating. It converts some of surface coat of rust (iron oxide) to ferric tannate, a black and more stable compound than rust. Rustoleum provides a wetting agent that should find all the flakes and cracks on the surface, particularly if it is applied thickly with a brush rather than sprayed.  It contains paint that, when it dries, keeps the ferric tannate surface in place and provides a protective coat.
> 
> This is intended for surface rust only. 
> 
> You might consider Ospho, a phosphoric acid based converter. It is a bit more powerful, so it acts on deeper rust than the tannic acid solutions.  It would also require another covering coat of paint, if you don't like the mottled black that Ospho tends to leave behind.
> 
> The "cold galvanizing" compounds should generally not be used over active (red) rust. Although it may successfully stop rust, it does not chemically address the oxides that already exist on the surface of the metal, other than fixing them in place. You should remove or convert the existing rust before coating with cold galvanizing.
> 
> Hope this helps.
> 
> Mickey N4MB
> 
> 
> 
> 
> On Mon, Dec 2, 2013 at 8:14 AM, Mike Reublin NF4L <nf4l at comcast.net> wrote:
> Anybody got an opinion about Rustoleum Rust Reformer vs cold galvanizing? Would you use it with cold galvanizing, or alone?
> 
> 73, Mike NF4L
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> -- 
> Mickey Baker, N4MB
> Fort Lauderdale, FL
> “Tell me, and I will listen. Show me, and I will understand. Involve me, and I will learn.” Teton Lakota, American Indian Saying.