Products that are prone to high corrosion resistance are cast with silica sol. The reason for using Silica Sol Casting is it has less deviation of dimensions, and its surface quality is outstanding.
On the other hand, water glass casting resembles a lot of investment casting. The only difference is that water glass casting involves water glass as a binder for the shell. Using it, very complex shapes can be achieved with amazing surface finish and outstanding precision. Water glass casting is much cheaper than silica sol casting.
Molding Material And Its Cost
The molding material in silica sol investment casting is silica sol zircons sand. This material can easily withstand 2000 degrees. However, this material is very expensive, which is why the process of silica sol casting is about 6.5 USD/kg.
While water glass casting processes utilize water glass quarts as a molding material and it is much cheaper than that used in silica sol casting. Water glass quartz can bear temperatures as much as 1800 degrees, and it costs about 2.5 USD/kg.
Silica sol casting is the best for metals that are likely to undergo corrosion. Different types of metals can be cast with it as it is quite versatile. You can get detailed casting with silica sol using the thin walls. Other than that, it also has amazing dimensional accuracy and gives perfect finishing at the same time.
The most important benefit of water glass casting is that it is environmentally friendly, and a lot of complex shapes can be achieved through it. It has a great surface smoothness and a few inside defects.