Survey on Potential Sedimentation and Corrosion in Drinking Water Resources of Malekshahi City Using Stability Indexes in 2014

Background and Aims: One of the important factors in controling water quality is potential corrosion and scale-forming. Scaling in pipes can cause sedimentation and reduction of water flow in pipes. As a result, more energy is required for water conveying. Therefore, The aim of this study was evaluation of chemical quality of corrosiveness and scaling of drinking water in Malekshahi water distribution network. Materials and Methods: this cross-sectional study was conducted in 2012. 144 samples were examined using Langelier (LSI), Rayznr (RSI), Pokurious (PSI) and aggressive (AI) indices to determine the corrosive and scaling potential in drinking water resources of Malekshahi city. Results: The results showed that the Langelier index, Reynar index, aggressive or corrosion index andindex Puckorius were -0.54 (±0.12), 7.63 (±0.19), 11.59 (±0.15) and 6.44 (±0.13) respectively which indicates that most of water supplies don�t tend to scale formation, however tendto mild corrosion. Conclusion:The results showed that drinking water supplies of Malekshahicity were under a mild corrosion situation. Therefore,water quality needs to be controled. Also, water pipelines should be preserved with several modes of corrosion inhibition