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Posted by yourname on March 29, 2006, 9:53 am
Please log in for more thread options Lloyd E. Sponenburgh wrote:
>
>>Hey everyone,
>>
>>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.)
>
>
> Those bits of steel that have been heated past incandesence to the
> 'sparking' stage by the grinder have lost their non-corrodable properties.
> The bits are so hot when projected by the wheel that they weld to the
> surface around. Each bit then rusts, and deposits that rust on the surface
> around it.
>
> LLoyd
>
>
reeeeally big vat of nitric acid should do the trick.......
don't try this at home kids, or at least let me watch
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>
> 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.)