The right way to close up a welding project, Primer? Weld Through? Weld putty? POR15? |
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The right way to close up a welding project, Primer? Weld Through? Weld putty? POR15? |
ctc911ctc |
Sep 26 2018, 05:41 PM
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#1
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Senior Member Group: Members Posts: 893 Joined: 9-June 18 From: boston Member No.: 22,206 Region Association: North East States |
Hi,
I am looking for definitive guidance and perhaps a pointer to a thread on this topic. We have finished all of the welding on metal that was primed with weld-through. We will now grind the welds. Is this the correct thing to do in this order? Zinc Primer Weld Weld some more plug up the holes with weld or epoxy (screw holes and small gaps) Grind the weld and expoy smooth (smoother) Treat the welds with 3M weld putty spray another coat of Primer Coat with POR15 Do I have this right? Flame ON!!!! (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/ar15.gif) |
VaccaRabite |
Sep 27 2018, 07:29 AM
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#2
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En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Weld. Grind. Etching primer or epoxy sealer.
The etching primer has acid in it and puts a fine etch into the metal which makes a good bond to the metal. Etching primer is not water resistant. It is porous. It will slow down rust forming, but not stop it in wet environments. The epoxy primer seals the metal. You will want to buff the metal with 400 grit paper before putting down the epoxy, as it is not self etching. I used epoxy on my car instead of etching primer. Epoxy will stop rust from forming, and encapsulate flash rust to keep it from spreading. POR15 is a type of epoxy primer sealer, but there is better stuff on the market these days at any auto paint supply place. Zach |
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