I build sculpture out of 316L Stainless Steel and am having serious RUST issues. It seem anywhere I grind using a hard disk to grind down welds will ends up with a ton of surface rust where ever the sparks of the grinding hit the sculpture. I'm having to RE-finish pieces to remove the millions of specks of rust that develop.
What's going on here? Is there carbide precipitation happening in each spark? (I can't get away from hard grinding some areas of my work after final assembly and the finish polish is already on 90% of sculpture.)
Is it the grinding wheel I'm using? (Do some disks have Ferrous material in them or something??) I usually don't use grinding wheels stamped "for stainless" because of their cost, but I always thought that was a matter of HOW they remove material, not that they would contaminate stainless steel.
James, Port Orchard