A lead-tin or lead-tin-antimony alloy could stand for 1000 years at a liquid state and will never separate ("stratify").
"Fluxing" does not "re-alloy" or re-mix the metal.
"Fluxing" does not "re-alloy" or re-mix the metal.
Cast method
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fredj338
Member
I & others will disagree.
"[13]Dross forms in a pot of molten metal by oxidation of the metal from exposure to heat, air, impurities, and dirt, and from running the alloy below its liquidus. As the metals melt, dross's (oxides of the metals) appear on the surface of the molten metal. They must be returned to the melt by fluxing, or else their removal as dross seriously depletes some of the important constituents of the alloy. Additionally, running the alloy too hot causes metal loss through oxidation and more frequent fluxing to return dross to the melt.
Do not allow the level of alloy in the pot to get below about half full so that proper temperature can be maintained, the temperature of many electric pots will rise as the level of alloy in the pot falls. Be cautious of the temperature falling below the liquidus point. Do not run the pot temperature any higher above its liquidus temperature than necessary, about 50o - 75o F".
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Fredj338, you and others are free to disagree as much as you would like, but remember, while we can have our own opinions, we can not have our own facts. It is a fact that lead-tin-antimony in solution (alloyed) will not gravity segregate.
Add salt or sugar to water up to, but not past, saturation. That salt or sugar is in solution with the water. Now seal the container so the water will not evaporate. The solution can stand for 1000 years, and the salt or sugar will still be dissolved and distributed in the water evenly; there will be no gravitational segregation/stratification.
Add salt or sugar to water up to, but not past, saturation. That salt or sugar is in solution with the water. Now seal the container so the water will not evaporate. The solution can stand for 1000 years, and the salt or sugar will still be dissolved and distributed in the water evenly; there will be no gravitational segregation/stratification.
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Magload
US Veteran
I believe that is because it is being stirred constantly by molecular motion. Don
Sure are some armchair chemists are weighing in here. 
I am not a chemist for sure, but I believe Glen Fryxell. He's a PhD in chemistry, so IMHO he knows his stuff. In his ebook, "From Ingot to Target" linked above, he'll tell you that alloys don't stratify. He gives a common sense example. He also says that surface oxides >can't< be returned to the alloy by fluxing - something about the reversal of oxidization being reduction. Reduction requires energy input to move electrons around. Now I said I'm not a chemist, so my apologies to all real chemists if I've confused things. Go to the directly to the source and read it for yourself. Fryxell debunks a lot of "tribal wisdom" that's been around for eons.
I am not a chemist for sure, but I believe Glen Fryxell. He's a PhD in chemistry, so IMHO he knows his stuff. In his ebook, "From Ingot to Target" linked above, he'll tell you that alloys don't stratify. He gives a common sense example. He also says that surface oxides >can't< be returned to the alloy by fluxing - something about the reversal of oxidization being reduction. Reduction requires energy input to move electrons around. Now I said I'm not a chemist, so my apologies to all real chemists if I've confused things. Go to the directly to the source and read it for yourself. Fryxell debunks a lot of "tribal wisdom" that's been around for eons.
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fredj338
Member
Sure are some armchair chemists are weighing in here.
I am not a chemist for sure, but I believe Glen Fryxell. He's a PhD in chemistry, so IMHO he knows his stuff. In his ebook, "From Ingot to Target" linked above, he'll tell you that alloys don't stratify. He gives a common sense example. He also says that surface oxides >can't< be returned to the alloy by fluxing - something about the reversal of oxidization being reduction. Reduction requires energy input to move electrons around. Now I said I'm not a chemist, so my apologies to all real chemists if I've confused things. Go to the directly to the source and read it for yourself. Fryxell debunks a lot of "tribal wisdom" that's been around for eons.
That quote is from Glenn's site on casting. I know it is true, based on my own casting exp for the last 35yrs.
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