Weld through ceramic coatings??

[p5.0ny]

Does anyboby know if you can weld through ceramic coating or does it have to be ground off?

The real question is on a pair of MAC LTs. If they are bolted up to the block and I cut some 3/8" steel to bridge between the tubes and welded it, would it work? Anybody try it. I can't be the first person with the idea. Would the coating bubble and pool in the weld?

Thanks

 

[R2D2]

wont work

 

[RYC CUKR]

coating has to be ground down. You gotta have bare metal to weld to .

 

[bluevenom867]

The exhaust shop was able to weld tabs onto our ceramic coated header collecter.I was also able to weld a small aera of the pipe to flange,and the enitre header is coated inside and out.As long as the work cable is is making a good connection,I think it will work.

 

[BlooDReigN]

The exhaust shop was able to weld tabs onto our ceramic coated header collecter.I was also able to weld a small aera of the pipe to flange,and the enitre header is coated inside and out.As long as the work cable is is making a good connection,I think it will work.

I bet those are some strong welds you got there!

 

[bluevenom867]

I bet those are some strong welds you got there!

Actualy they are,%100 penitration at the flange to pipe joint and the tabs are very secure.

 

[fastford91]

i am a welder by trade and you must take the coating off before trying to weld or all youll get is a huge mess and probably a usless part!! do it right and save time and money !!!

 

[bluevenom867]

i am a welder by trade and you must take the coating off before trying to weld or all youll get is a huge mess and probably a usless part!! do it right and save time and money !!!

What kinda welder did you try it on?

I used a flux core type,so perhapse most of the molten ceramic ended up in the slag?

 

[fastford91]

What kinda welder did you try it on?

I used a flux core type,so perhapse most of the molten ceramic ended up in the slag?

ya some of your coating did end up in the slag but some of it also got mixed into the base metal creating a weak weld! i guarantee if you xrayed or ultrasound the weld it will show impurites and weak spots in the weld though not visable with the eye! they are there ! but it dosnt mean that they will break ! not yet anyway! but like i said do it right and save time and money! just a little grinding no big deal!!!