So I'm replacing panels on my mini and obviously want to coat the panel before tacking it in place as wont be able to once fit can someone help me with this process, can you zinc primer then weld over it is there then rust paints to then cover the primer im confused lol.
Zinc Primer?
Started by
stevewidds
, Apr 30 2021 04:22 PM
6 replies to this topic
#2
hulsmeier
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Posted 30 April 2021 - 04:28 PM
Depends on the method of welding. Having said that I think most welding will burn through the paint regardless.
I've been using Screwfix cold galvanising spray, it's weldable. On panels I have painted in epoxy then ground areas to be welded to bare metal and coated in the zinc primer. Once welded I recoat with the primer, but usually go back and cover with epoxy primer
I've been using Screwfix cold galvanising spray, it's weldable. On panels I have painted in epoxy then ground areas to be welded to bare metal and coated in the zinc primer. Once welded I recoat with the primer, but usually go back and cover with epoxy primer
#3
Maccmike8
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Posted 30 April 2021 - 04:51 PM
I thought zinc/galvanised surfaces gave off highly poisonous fumes when welded?
I would personally used weld through primer on weld sites.
Edited by Maccmike8, 30 April 2021 - 04:52 PM.
#4
sonikk4
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Posted 30 April 2021 - 05:38 PM
I use Upol's Zinc rich weld through primer. Also if you can get to the welded flange / area afterwards, i use a piece of scotchbrite to remove any burnt bak primer and then re coat.
Areas like the outer sill, the best thing you can do is force some epoxy primer into the void followed by topcoat (is does not need to be anything colour specific, plain Black will do.)
#5
hulsmeier
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Posted 30 April 2021 - 11:11 PM
I thought zinc/galvanised surfaces gave off highly poisonous fumes when welded?
I would personally used weld through primer on weld sites.
Most weld through primers contain zinc. Pretty much the same thing as cold galvanising spray.
I would guess the coating on hot galvanised sheet metal is thicker and more concentrated than what comes out of a can
https://www.frost.co...a4aAuaWEALw_wcB
#6
Maccmike8
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Posted 01 May 2021 - 08:41 AM
I thought zinc/galvanised surfaces gave off highly poisonous fumes when welded?
I would personally used weld through primer on weld sites.
Most weld through primers contain zinc. Pretty much the same thing as cold galvanising spray.
I would guess the coating on hot galvanised sheet metal is thicker and more concentrated than what comes out of a can
https://www.frost.co...a4aAuaWEALw_wcB
Ah ok, good to know thank you.
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