grayseal
Materials
- Jun 29, 2001
- 78
We are experiencing problems with electopolishing .025" thick x 7" round discs of 301 stainless steel. The supplier says that water spots are the cause.
The parts are blanked on a die and then washed. The detergent is an alkaline material and is used in an industrial spay washer. Compositon by weight % is as follows:
5-10 % potassium hydroxide
5-10 % sodium silicate
10-20 % tetrapotassium pyrophosphate
5-10 % 4 Na ethylene diamate tetra acetate
After the parts are washed, they are heated in a oven at 600 degrees F for one hour. The suppier claims the electropolishing operation will not remove the spots.
Can this be possible?
The parts are blanked on a die and then washed. The detergent is an alkaline material and is used in an industrial spay washer. Compositon by weight % is as follows:
5-10 % potassium hydroxide
5-10 % sodium silicate
10-20 % tetrapotassium pyrophosphate
5-10 % 4 Na ethylene diamate tetra acetate
After the parts are washed, they are heated in a oven at 600 degrees F for one hour. The suppier claims the electropolishing operation will not remove the spots.
Can this be possible?
