phyregod
!!YTINASNI
Fire your welder and get a new one.. Nothing like a sexy "stack of coins" weld on some aluminum..
You need to use 100% argon shielding gas.. Clean before the weld with a stainless steel brush. That will clean up most of that porosity. Those bubbles are contaminants entering through atmospheric gas or contaminated aluminum.
You need to use 100% argon shielding gas.. Clean before the weld with a stainless steel brush. That will clean up most of that porosity. Those bubbles are contaminants entering through atmospheric gas or contaminated aluminum.