Help! How do I remove flux residue from stainless steel?!

Posted by admin on November 28th, 2009 at 09:33am

We custom make birdcages out of 304L ss rod for exotic birds. After resistance welding, the cross-wire joints are silver brazed for additional strength and to make a smooth fillet so the bird’s claws don’t get stuck.
Our problem lies with the flux residue cleanup. We are presently removing the bulk of the sticky stuff with scotchbrite pads, and then finishing by manually polishing with a small buffing wheel on a Foredom flexshaft. This is very time consuming.
A series of pickling/neutralizing/rinsing tanks would take up quite a bit of room due to the size of the cages, and also be quite a bit of chemicals, expense, etc.
We can’t use the pedestal buffer due to its desire to hurl the cage across the room when it gets a good grip. It also only reaches the outside.
I’ve considered purchasing some kind of industrial steam cleaner that could get hot enough to remove the gooey flux, but I doubt it would do much for the firescale, which seems to need to be manually or chemically removed. This choice would also be expensive and would be one more machine demanding bench space in the shop. Please help us find a solution! If Caswell doesn’t have a product or method for this, can anyone recommend a direction for us to pursue?
Thanks in advance for ANY advice!

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