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scale removal after heattreat
- Thread starter DanL
- Start date
- Joined
- Sep 1, 1999
- Messages
- 259
Vinegar is a crude dilution of acetic acid that varies with type and maker. If you want a uniform solution, go to a photographic supply and buy a bottle of "Short Stop" (dilute acetic acid) and just mix as per instructions. Pickle a test piece of scrap overnight and you will know how to dilute (more or less concentrated.)
I really hate to be the one to have to mention this, but you can obtain an anti-scale compound from Brownells that will totally eliminate scale without effecting heat treatment. I have used this compound for years with a furnace and a torch with uniform results.
I really hate to be the one to have to mention this, but you can obtain an anti-scale compound from Brownells that will totally eliminate scale without effecting heat treatment. I have used this compound for years with a furnace and a torch with uniform results.
- Joined
- Sep 1, 1999
- Messages
- 259
Yes, a magnet works through the coating. I bought a few assorted magnets made by General, called Power Alnico Magnets. With these very strong magnets, you don't have any trouble detecting decalescence. I bought mine from J&L Industrial Supply, 1-800-521-9520.
The only trouble I have had with them is that the family keep taking them to tack notes on the refrigerator door. I suggest you buy several.
The only trouble I have had with them is that the family keep taking them to tack notes on the refrigerator door. I suggest you buy several.
- Joined
- Sep 1, 1999
- Messages
- 259
Brownells, Inc. http://www.brownells.com/Product/index.asp
The product you want is:
#083-015-100 PBC Non-Scale Compound. Ship wt. 2# $14.99 plus shipping.
From Page 139 Catalog #52 (current catalog.)
The product you want is:
#083-015-100 PBC Non-Scale Compound. Ship wt. 2# $14.99 plus shipping.
From Page 139 Catalog #52 (current catalog.)
- Joined
- Sep 1, 1999
- Messages
- 259
I think I should add one final tip. If you use the super alnico magnets, as I do, you will feel the magnetic pull as you place the magnet very near the blade. You don't have to push it onto the surface at all, after some practice. You will feel the magnetic attraction. When you can touch the blade coating with the magnet, with no attraction, you are at Decalescence.
But, for pity sake, practice a few times on scrap pieces before committing a blade you have worked on for days. You'll soon get the "feel" of it and have no further hesitancy to use the method. But, don't try it with ordinary magnets; use only the super alnicos.
They don't cost that much more, anyway.
But, for pity sake, practice a few times on scrap pieces before committing a blade you have worked on for days. You'll soon get the "feel" of it and have no further hesitancy to use the method. But, don't try it with ordinary magnets; use only the super alnicos.
They don't cost that much more, anyway.