Silica Scaling in Boilers. Silica, in amounts ranging from less than 1 to over 100 ppm, is found in all natural water supplies. In rain hail and snow, silica content range from 1 to 2.8 ppm. In the analyses of various surface and ground waters, silica content range from 1 to 107 ppm. This refers to soluble silica content and not to the silica that may be present in the suspended matter.
Silica Scaling in Boilers - Lenntech
The vaporous silica carryover at a pH of 11.0 is 74% of that at 8.8. The only effective method for preventing excessive silica or other vaporous carryover is reduction of the boiler water concentrations. Another common source of excessive impurities in steam is inadequate attemperation spray water purity.
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The Importance of Boiler Water and Steam Chemistry
The Effects of Corrosion in a Boiler | Chardon Labs
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