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Antique Tractor Paint and Bodywork

paint and rust

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brad siegmund

02-18-2008 09:40:53




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I'm building a pond footbridge using a welded-up series of old steel girders which have various amounts of rust. Before constructing the wooden superstructure part I would like to coat the girders with something fast and easy and safe htat will help them last forever. Any suggestions would help?




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Circus

02-19-2008 04:06:58




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 plagiarized from highway comission in reply to brad siegmund, 02-18-2008 09:40:53  
Performance Experience: Recent and ongoing FHWA-sponsored test programs have found that coating systems employing zinc-rich primers have performed very well as a generic class, even in harsh marine and salt-rich environments when applied over blast-cleaned steel (SSPC SP-10 or SP-5). Three-coat systems such as solvent borne inorganic zinc or organic zinc primer/ epoxy intermediate/ urethane topcoat, have shown performance far superior to all other conventional coatings (without zinc-rich primers) tested in parallel to-date under harsh exposure conditions. The primary performance difference between zinc-rich coating systems and systems based on barrier or inhibitive protection is the resistance to disbondment and underfilm corrosion at holidays or defects in paint films and at corners and edges of structural steel members. Performance of inorganic zinc-rich coating systems has been particularly good in various test programs.1, 2, 3 Organic zinc-rich systems have also performed well over blast-cleaned surfaces, as long as the zinc pigment concentration in the formulation has been sufficient to ensure conductivity of the primer.4, 5 Many formulations are marketed as organic “zinc-rich” with low levels of zinc pigment. These formulations would not be expected to perform better than a similar barrier coating system without the zinc pigment.

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GeneMO

02-19-2008 20:01:32




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 Re: plagiarized from highway comission in reply to Circus, 02-19-2008 04:06:58  
Hmmmmm, dont think we are going to be able to find this stuff in a rattle can huh?



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circus

02-20-2008 03:17:20




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 Re: plagiarized from highway comission in reply to GeneMO, 02-19-2008 20:01:32  
Spraybomb is probably the only way you will find zinc-rich coating. Rustolium zinc-cele and other brands. I've seen it in most hardware stores.



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Dan in Pa

02-18-2008 17:32:31




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 Re: paint and rust in reply to brad siegmund, 02-18-2008 09:40:53  
I would give that old steel at least a half decent cleaning and then apply a good coat of rust converter, available at walmart, or phosphoric acid, sold at advanced auto called The Right Stuff. These products really do a good job stopping rust and preping metal for topcoat.



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brad siegmund

02-19-2008 06:56:15




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 Re: paint and rust in reply to Dan in Pa, 02-18-2008 17:32:31  
would that work only on the exposed metal or corroded surfaces? Most of the girders have some degree of paint left. Iwould hope to just paint over those areas?



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Dan in Pa

02-19-2008 15:54:08




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 Re: paint and rust in reply to brad siegmund, 02-19-2008 06:56:15  
It would only work on exposed metal and rusted surfaces



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GlenIdaho

02-18-2008 14:28:26




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 Re: paint and rust in reply to brad siegmund, 02-18-2008 09:40:53  
Check out the POR 15 website. It is a very tough and duarble rust preventer. It can be brushed on and smoothes out very well. The draw back is there is some prep that must be done and it does not hold up to UV rays and therefore must be top coated.



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