Pengaruh Kualitas Air Dari Waduk Jatiluhur Sebagai Pendingin Terhadap Korosi Pada Unit Penukar Panas [Effects Of Water Quality Of Reservoir Jatiluhur As To Corrosion On Cooling Unit Heat Exchanger]

Abstract

The problems of corrosion and scale formation often occur in the industrial sector, especially in heat exchanger unit. The factors, which influence the corrosion of metals and scale formation are the quality of the cooling water, the temperature, pH and the kind of metals. Some of observations had been performed to analyze the influence of the cooling water from Jatiluhur Dam to corrosion at the material tube of the heat exchanger and utility which made from carbon steel type : A179C;1045; A192; and A515-70 in the variable of temperatures: 32, 37 and 50 °C, by means of the polarization method and the prediction of scale formation tendency, which determined from the chemical composition analysis of the cooling water on base of Langelier Saturation Index method. The results of observation showed that the corrosion rates of carbon steels are affected by the quality of the cooling water; the temperature, the chemicals composition. The analysis results from both samples of the cooling water have negative value of the saturation index degree. These showed that cooling water from the Jatiluhur Dam tend to a corrosive.