 Consensus on Lap Joint Weld Prep? |
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| bkrantz |
 Dec 17 2019, 09:45 PM
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#1
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914 Guru  Group: Members Posts: 8,616 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains 
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So based on experience and expert knowledge, what's the best way to prep metal for lap joints, especially with plug welds? No paint or treatment? Ospho? Weld-through primer? And what about seam sealant after welding before paint?
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| bretth |
Dec 18 2019, 04:18 PM
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#2
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Senior Member Group: Members Posts: 899 Joined: 23-June 15 From: Central TX Member No.: 18,882 Region Association: Southwest Region |
Weld through primers I have used always contaminated the welds if they get into the welding puddle. I masked off the areas with tape where the actual welding will be then sprayed on the primer just to have some sort of protection in areas that may harbor rust in the future. Make sure the back side of the weld has no primer either for same reason.
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Posts in this topic
bkrantz Consensus on Lap Joint Weld Prep? Dec 17 2019, 09:45 PM
cary Metal : ?
Old on old ?
New on Old ?
New on new ?
... Dec 17 2019, 11:22 PM Literati914 Scuff to clean metal, then phosphoric acid, let dr... Dec 17 2019, 11:42 PM
bbrock
Scuff to clean metal, then phosphoric acid, let d... Dec 18 2019, 09:00 AM
FL 000
This was my process too. Only thing I'll ad... Dec 18 2019, 01:43 PM BeatNavy
(I've paid good money for Weld Thru primer th... Dec 18 2019, 04:06 PM Costa05 Definitely no expert here but I lap welded my fron... Dec 17 2019, 11:54 PM Tdskip UPol high zinc does not burn back much it at all i... Dec 18 2019, 11:18 AM cary I use the same U-Pol weld thru primer.
But it only... Dec 18 2019, 02:09 PM FourBlades Weld through primer is a misnomer in my opinion. M... Dec 18 2019, 02:49 PM Superhawk996 Just a generalized statement.
Avoid lap welds i... Dec 18 2019, 03:58 PM doug_b_928 I've been following a similar procedure to mos... Dec 18 2019, 04:21 PM rjames FCA Explains Ban on Weld-Through Primer Dec 18 2019, 08:27 PM doug_b_928 Here's a link to a discussion I had a couple o... Dec 18 2019, 09:38 PM bkrantz Thanks, everyone. Dec 18 2019, 11:06 PM mb911 The ban link is a good one.. Remember steel melts ... Dec 19 2019, 05:52 AM |
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