Bob from Memphis - Solutions to Sodium silicate problems
- Yes, all of these additives work well with aluminum. The sodium silicate
binder system works BEST with aluminum, OK for copper base and steel, and
WORST with iron. This has to do with retained strength after pouring at the
Yes, we often use corn syrup or molasses as an addition. If you use corn
syrup, use a low Dextrose Equivalent corn syrup. It is less hygroscopic (it
won't pick up moisture in storage).
I have spent 30 years trying to make silicates do all kinds of things. It is
one of the most widely used chemicals in the metals industry. We use it as a
sand binder, as a binder in refractories, as a flux and as a binder in
coatings. If you drink water from a municipal water system, it probably
contains about 0.1% of sodium silicate to prevent the iron pipes from
corroding. Hell, I also use it to knock down high acid contents in my
winemaking activities. (my other passion).
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