Langelier index


Also found in: Acronyms.

Langelier index

[‚länzh·əl‚yā ′in‚deks]
(chemistry)
A measure, based on pH, of the degree of calcium carbonate saturation in water, where negative values indicate that corrosion may result (pH below 7, dissolves calcium carbonate), and positive values indicate that scale deposition may result (pH above 7, precipitates calcium carbonate).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In contrast, RO would produce a water (permeate) that had no hardness and would be too soft and corrosive for drinking water without blending with untreated feed water, another source water, or post-treating for corrosiveness by adjusting the Langelier Index or the use of zinc orthophosphate corrosion inhibitors.
In the corrosion investigation, the 1990 statistics were studied using the following the following indexes: the Baylis curve, the Langelier index, and the calcium carbonate stability curve.