The Rover-Landers of BC

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PostPosted: Wed Dec 06, 2017 10:12 pm 
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Grease Monkey

Joined: Wed Sep 28, 2016 3:14 pm
Posts: 6
In UK, the accepted treatment for newly galvanized parts, generally complete chassis, is to treat them with a chemical solution known as T-wash, produced by WM Barr. I've been unable to identify an equivalent treatment here. Please, what is used to treat freshly hot dip galvanized components before painting? Many thanks, in advance, for any and all suggestions.

Mike


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PostPosted: Wed Dec 06, 2017 11:13 pm 
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Half Shaft
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Joined: Mon Mar 02, 2015 1:30 pm
Posts: 130
You can download the product specs and safety data here:

https://www.crowntrade.co.uk/product/exterior-products/crown-trade-protective-coatings-t-wash/

The safety data sheet (similar to our MSDS) lists the material composition. Seems it is an etching primer. You should be able to find something similar from an industrial paint supplier. More into on painting over galvanizing is available here:

http://daamgalvanizing.com/wp-content/uploads/2015/12/Paint_Guide_Prepare_Galvanized_Steel2011.pdf

M.

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'96 Discovery 1 - Hothead
'80 Triumph TR7v8 (Rover 4L)


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PostPosted: Thu Dec 07, 2017 8:59 am 
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Tomb Raider

Joined: Tue Sep 28, 2010 6:56 pm
Posts: 373
Location: Southern Vancouver Island
Hi Mike

Fresh galvanized metal has kind of a oily finish so what you can do is first wire brush the metal (to etch it a bit so the paint sticks) then wash down with pure white vinegar (vinegar is a acid) rinse with clean water then use a primer made for galvanized metal then top coat with the finish coat.
I have used this method with no problems.

Victor 1962 Dormobile ( In hibernation for the winter)


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PostPosted: Sat Dec 09, 2017 11:39 am 
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Grease Monkey

Joined: Wed Sep 28, 2016 3:14 pm
Posts: 6
Many thanks, both, for the replies and links. I've sent Crown an e-mail to ask if their products are available over here, and ann e-mail to Daam to ask if they can recommend a specific product(s).

I've read up on the different requirements for the various conditions of galvanized steel, but I'm really stuck on getting actual brand names of suitable etch primer. The American Galvanizers Association (http://www.galvanizeit.org) is a great source of information, but it stops short of recommending actual products.

After using vinegar as an etch solution what primer do you use, island dormy? Have you had any of the painted galvanized items exposed to road salt, and have you had any paint failures? Since I'm doing a complete rebuild I don't want to have to come back in a couple of years time to re-do anything.

Mike


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