Killer compressors
Fleet Mechanic
Joined: Sep 2006
Posts: 1,491
Likes: 295
From: Fresno, CA
I was just pointing it out.
I'll add IMO weld seams are usually the weak point, not the weld itself, but the material next to the weld gets annealed and the crystalline structure is altered. Same as doing the stupid move of hardening the base material for a valve seat.
Depending on the filler and base metal, also the potential for creating a galvanic cell (accelerated corrosion) at that location due to the dissimilar metals, as well as any oxygen concentration gradients that may have been created, or any hydrides or oxides which may have formed during the process. Not what you want in an air compressor tank, and why the good ones are more expensive. Way farther down the rabbit hole then I was intending for the comment; geez it's just a diesel forum.....
I'll add IMO weld seams are usually the weak point, not the weld itself, but the material next to the weld gets annealed and the crystalline structure is altered. Same as doing the stupid move of hardening the base material for a valve seat.
Depending on the filler and base metal, also the potential for creating a galvanic cell (accelerated corrosion) at that location due to the dissimilar metals, as well as any oxygen concentration gradients that may have been created, or any hydrides or oxides which may have formed during the process. Not what you want in an air compressor tank, and why the good ones are more expensive. Way farther down the rabbit hole then I was intending for the comment; geez it's just a diesel forum.....
Typically there is a joint down the length of the shell so that's the failure point...
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
Or your wife uses dryer sheets & fabric softener on your work shirt the day you're welding. Prettiest blue flames.
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Primered86XLT
1987 - 1996 F150 & Larger F-Series Trucks
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Mar 23, 2005 05:21 PM
