Langelier is a term that is primarily associated with water chemistry and is often used to refer to the Langelier Saturation Index (LSI). The Langelier Saturation Index is a measure of the potential for scale formation or corrosion in water based on its calcium carbonate concentration.
In water treatment, the Langelier Index is calculated by comparing the actual pH, alkalinity, calcium concentration, and temperature of the water sample to its equilibrium values. This index is used to determine whether the water is corrosive, scaling, or balanced.
A negative Langelier Saturation Index indicates that the water is undersaturated, meaning it has a tendency to leach calcium carbonate from surfaces, potentially causing corrosion. On the other hand, a positive Langelier Index suggests that the water is oversaturated, which can lead to the deposition of calcium carbonate scale on pipes, plumbing fixtures, and other surfaces.
By monitoring and adjusting the Langelier Index, water treatment professionals can better control the corrosiveness and scaling potential of water systems. This helps ensure the longevity and efficiency of equipment, such as boilers, heat exchangers, and water distribution systems.
In summary, Langelier is a term associated with the Langelier Saturation Index, which is a measure used in water chemistry to determine the potential for scale formation or corrosion based on the calcium carbonate concentration.
