Drinking water corrosion control

Since replacing plumbing in homes, or municipal water distribution pipes, is very expensive, it makes sense to control the problem of high concentrations of lead in drinking water by controlling the water s aggressiveness. This is referred to as corrosion control. 

CER 141.82, National Primay Drinking Water Regulations-Description of Corrosion Control Treatment Requirements, rev. July 1, 1991. 

The electrolytes are non-corrosive and the electrodes do not corrode with time. This feature is of special significance when compared with an ordinary liquid resistance starter used commonly for slip-ring motors. Electrolytes do not deteriorate and therefore do not require replacement. The evaporated liquid can be replenished with drinking water when the level of the electrolyte falls as a result of evaporation. In Europe such starters have been used for over 15-20 years. Electrolyte switching is a costlier proposition compared to direct on-line or star/delta switching due to additional shorting contactor and timer, and the cost of electrolyte, its tank and thermostatic control etc. The cost may. 

The corrosion rate of copper in water is very low. In drinking water systems, the copper release to the water has to be controlled for hygienic and health reasons. The use of copper in drinking water systems is specified in DIN 50930,... 

In addition to water quality control as per the Safe Drinking Water Act (SDWA), the application of chemicals for adjusting pH is one of the main options of internal corrosion control. It should be noted that pH control alone is not sufficient to counter corrosion problems. In such cases, corrosion inhibitors may be used for internal corrosion control. Corrosion inhibitors consist of chemicals that are used in small quantities to counter corrosion. The impact of inhibitors on water quality and their effectiveness... 

Requirements to Conduct Corrosion Control Chemical analysis of the water and adoption of a corrosion control strategy to reduce the lead release rates are required. Drinking water is analyzed for corrosion by (i) weight loss, (ii) total... 

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