What Does Larson-Skold Index Mean?
The Larson-Skold index refers to an empirical scale used to measure the degree of corrosiveness of water relative to mild steel metal surfaces. It is generated based on the in-situ corrosion of mild steel pipelines used to transport naturally occurring water from lakes and other freshwater sources.
Corrosionpedia Explains Larson-Skold Index
The Larson-Skold index is the ratio of twice the number of moles per liter (mol/L) of sulfate (SO42-) plus chlorides (Cl-), to the moles per liter of alkalinity that is typically in the form of bicarbonate and/or carbonate. The Larson-Skold index scale presents the following outcomes of corrosion tendency:
|LR||Tendency to corrosion|
|< 0.2||No metal tendency|
|0.4<LR=>0.2||Light metal tendency|
|0.5<LR=>0.4||Low metal tendency|
|1.0<LR=>0.5||Mid metal tendency|
|=> 1.0||High metal tendency|