A model was developed to generate charts that fit the conditions as diverse\ntemperatures and ionic strengths, and that estimate the diversified state of\nwater. The chart can be used as a tool for controlling corrosive waters resulted\nin internal corrosion and the model producing charts composed of a number\nof sub modules, and each module incorporated parameters including acidity,\nalkalinity, pH, and calcium ion. Utilizing the chart water quality of the raw\nwater in G water purification works was estimated to be unsaturated and\nLangelier index becomes âË?â??1.4 which means that the water is highly corrosive\nand calcium carbonate would not be precipitated. Thus, the water requires\ntreatment as the injection of water stabilizing chemicals to promote an oversaturated\n(protective) condition. As a result of adding 5 mg/L of lime, it is\npossible to be precipitated with 5 mg/L, and the water becomes noncorrosive.\nIn addition, when 5 mg/L of caustic soda is added as a conditioning chemical,\nit signifies to be precipitated with 9 mg/L, and the water also turns out to be\nlargely noncorrosive. Both chemicals are possible to use for the water to be\nfavorable for the formation of a protective film. Optimum injection rate for\ncontrolling corrosion can be found by repeating the procedures until the\nwell-conditioned water criteria are satisfied.
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