Treatment of Water to Prevent Corrosion

Baylis, John R.

doi:10.1002/j.1551-8833.1935.tb18424.x

Cited by 15 publications

(6 citation statements)

References 4 publications

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“…Extension of the use of calcium carbonate scale for prevention of corrosion and the control of excessive scale deposition has been encouraged by the constructive and able research of Professor W. F. Langelier (l). He advanced the idea-now widely accepted -of a calculated saturation index as a means of predicting the corrosive or scaling behavior of a natural water (2,3,4,5,6,7,8,9). Previously, other investigators had done work along somewhat similar lines but had employed different methods for calculating and expressing their data.…”

Section: Controlled Calcium Carbonate Scalementioning

confidence: 99%

Recent Developments in Corrosion Control

1946

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Section: Controlled Calcium Carbonate Scalementioning

confidence: 99%

Recent Developments in Corrosion Control

1946

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“…Prediction, monitoring and consequences of CaCO 3 formation has long been a key issue in drinking water treatment. An initial concern was that water strongly undersaturated with CaCO 3 would be corrosive to metal and concrete pipe infrastructure (Baylis 1935). On the other hand, for water highly supersaturated with CaCO 3 , these are problems concerning scaling.…”

Section: Introductionmentioning

confidence: 99%

Scale precipitation on HDPE pipe by degassing of CO2 dissolved in water

Ketrane

Yahiaoui

2021

Journal of Water Supply: Research and Technology-Aqua

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In Algeria, high-density polyethylene (HDPE) is widely used in drinking water pipes. This study is focused on the precipitation of calcium carbonate, a major constituent of scale, from calcocarbonically pure (CCP) water in HDPE pipe. Studying scaling in natural conditions is very difficult because it occurs over many years. For this, accelerated scaling is caused by the degassing CO2 dissolved in water. The kinetic study has shown that the germination time and the critical pH decrease with the hardness (30, 40 and 50 °f) and temperature (30, 40 and 50 °C) of water. On the other hand, scaling process efficiency (η) and the supersaturation coefficient (Ωcal) of CaCO3 increase with these parameters. The CaCO3 precipitation occurs both in solution and on walls of HDPE. By the weighing method, it is shown that the deposit mass increases with hardness and temperature. Calcium carbonate precipitates much more in homogeneous phase than in heterogeneous one. The study also showed that heterogeneous nucleation on HDPE is much less important than on PA, PVC, chrome and Inox. These measurements are supported by the characterization of X-ray diffraction deposits and by scanning electron microscopy, which recognizes that the precipitate obtained consists mainly of calcite.

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“…Waters highly supersaturated with respect to CaCO 3 can cause severe scaling problems including pipe blockage and energy loss in heat transfer elements of hot water systems . Nearly a century ago, waters that were highly undersaturated with respect to CaCO 3 were also assumed to be corrosive to metallic and concrete pipe infrastructure, leading to studies attempting to reduce corrosivity by increasing the likelihood of CaCO 3 precipitation as monitored with Langelier and similar indices.…”

Section: Introductionmentioning

confidence: 99%

Effect of Corrosion Inhibitors on In Situ Leak Repair by Precipitation of Calcium Carbonate in Potable Water Pipelines

Wang

Devine

Edwards

2017

Environ. Sci. Technol.

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Corrosion inhibitors can affect calcium carbonate precipitation and associated in situ and in-service water distribution pipeline leak repair via clogging. Clogging of 150 μm diameter leak holes represented by glass capillary tubes, in recirculating solutions that are supersaturated with calcite (Ω = 13), demonstrated that Zn, orthophosphate, tripolyphosphate, and hexametaphosphate corrosion/scaling inhibitors hinder clogging but natural organic matter (NOM) has relatively little impact. Critical concentrations of phosphates that could inhibit leak repair over the short-term in one water tested were: tripolyphophate (0.05 mg/L as P) < hexametaphosphate (0.1 mg/L) < orthophosphate (0.3 mg/L). Inhibitor blends (Zn+orthophosphate and Zn+NOM+orthophosphate) had stronger inhibitory effects compared to each inhibitor (Zn, orthophosphate or NOM) alone, whereas Zn+NOM showed a lesser inhibitory effect than its individual component (NOM) alone due to formation of smaller CaCO particles with a much more negative zeta-potential. Overall, increased dosing of corrosion inhibitors is probably reducing the likelihood of scaling and in-service leak repair via clogging with calcium carbonate solids in potable water systems.

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Treatment of Water to Prevent Corrosion

Cited by 15 publications

References 4 publications

Recent Developments in Corrosion Control

Recent Developments in Corrosion Control

Scale precipitation on HDPE pipe by degassing of CO2 dissolved in water

Effect of Corrosion Inhibitors on In Situ Leak Repair by Precipitation of Calcium Carbonate in Potable Water Pipelines

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