How is aggressivity index calculated?
The formulae used in the aggressive Index is stated as AI = pH + log (A * H). In this statement, “AI” represents the aggressive Index. “A” is the alkalinity of the water.
What is the saturation index?
Saturation Index is a tool for determining if your pool’s water is corrosive or scaling. If your water is corrosive, the pool’s water will dissolve calcium in pool linings and protective coatings. If your water is scaling, calcium will be deposited on pipelines, filters, valves, and pump.
How do you calculate the saturation index of water?
The formula to calculate LSI is: (pH) + (Temperature ºF) + (Calcium Hardness) + [(Total Alkalinity) – (CYA correction factor @ current pH)] – (TDS factor) = LSI. This water would be slightly off balance, leaning a little toward the corrosive side, but still within acceptable range.
What is corrosivity ratio?
A three-tier classification system based on the chloride-to-sulfate mass ratio (CSMR) developed by Nguyen and others (2010, 2011) is used to assess levels of concern related to galvanic corrosion of lead in water distribution systems.
How is the Langelier Saturation Index calculated?
The LSI index is calculated at two temperatures: 25oC (room temperature) and 82oC (cage wash cycle)….pHs = (9.3 + A + B) – (C + D) where:
- A = (Log10[TDS] – 1)/10 = 0.15.
- B = -13.12 x Log10(oC + 273) + 34.55 = 2.09 at 25°C and 1.09 at 82°C.
- C = Log10[Ca2+ as CaCO3] – 0.4 = 1.78.
- D = Log10[alkalinity as CaCO3] = 1.53.
How do you balance Saturation Index?
How do I lower the saturation index in my pool?
To lower your LSI value, add muriatic acid (can be found in pool supply stores). Consult the calculator above to determine the target pH value (recommended range is 7.2 to 7.6).
What is the formula for the aggressive index?
The hardness of the water turned by a water mineral content test. The formulae used in the aggressive Index is stated as AI = pH + log (A * H). In this statement, “AI” represents the aggressive Index. “A” is the alkalinity of the water.
What is the aggressive Index in AWWA C-400?
The aggressive Index is a part of Standard C-400 established by the American Water Works Association (AWWA). It relates to the corrosive tendency of water and to its effect on asbestos cement pipe.
Which is the best definition of aggressive water?
Aggressive water is water that has some excess of carbon dioxide. It is also called carbon anhydride or carbonic acid. In order to foster an equilibrium state and avoid any deposit of chemical elements into water, there is a need for the presence of carbon dioxide.
How is the Langelier Saturation Index related to corrosion?
The Langelier Saturation Index (LI), a measure of a solution’s ability to dissolve or deposit calcium carbonate, is often used as an indicator of the corrosivity of water. The index is not related directly to corrosion, but is related to the deposition of a calcium carbonate film or scale; this covering can insulate pipes,