What is the Langlier Saturation Index (LSI)?
The LSI is a simple calculation developed by a boiler engineer to try and predict whether calcium will form scale or water will become corrosive. It is based on the false assumption that all scale formation is due only to saturation and that the water is in direct contact with the metallic surface.
It is easy to use, simple to calculate, and is used by chemical companies and water treatment companies to predict scale or corrosion and monitor their treatment plans.
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