weld thru primer.
Turbo Mini Forums

well, my welder is now here so i can get practicing and then move on to my car.
i have some weld thru zinc primer to use when i do the car, has anyone used this? i am using a mig so will this cause any weakness in the weld or is it ok? i just need opinions/info about it really
cheers
DAN :)

nope its good...

you dont want bare metal under a patch for example, so weld throu primer is great for that.

alex

AlexF

Weld tru primer is ok at the time of welding, however, with patching the rust will keep on going. no matter.
If rust has to stay away than cut out the old rusty part and weld in the new plate.
Leave 0.8 to 1mm between 2 plates so if you grind them you do not remove the total weld.

cheers guys, i will definatley be using it then. and don't worry arno i'll make sure all traces of rust are gone, i have my wire brush attachment on my grinder ready.
DAN :)

any other people have experience/suggestions about the stuff?

You will find it hard to put a coating on the material between the patch and tha original material thats all.

yeh, i use the stuff, seems fine, never had any problems with the welding side of it, dont know how good it is in terms of rust prevention, bit too early to tell. only problem i have is that the nozzle seems to block very easily.

Pete

And on the 7th day........... God created turbochargers!

If your nozzle blocks that means that you are trying to weld other material than steel. That means that the weld tru primer is burned off, so no need for this primer then.
Keep your material as clean as ever possible before welding for the best results than after grinding do the primer bit.

i meant the nozzle of the can, and that's only because im too bloddy lazy to clean it! apologies for any confusion! :)

Pete

And on the 7th day........... God created turbochargers!

my understanding of weldthru primer is for use when spot welding. The paint dosen't stop the current flowing to get the spot heating and does not contaminate the weld. You then get a joint that is painted between it except where the heat was applied for the spot weld.