Investigating the Performance of AntiFouling and aAnti-Corrosion Chemicals in the Cooling Network

The main chemical treatment of the cooling network is done with two chemicals; anti-corrosion and anti-fouling. These two chemicals act as complements. The nature of the make-up water entering the cooling network of Mahabad Petrochemical Complex is sedimentary. In the sedimentary waters, according to LSI, scaling control is more important than corrosion. Therefore, even if the uniform corrosion rate increases up to 1 MPY, its economically and technically better than blocking and scaling damage such as pitting corrosion. The Anti-fouling agent plays a major role in controlling scale. This substance is a combination of different polymers that can control the scale in the circulating water of the cooling system and prevent the formation of scale with the mechanism of dispersing sediment-causing salts and prevent the formation of corrosion under the sediment. The type of polymer used and its concentration are very important in the effectiveness of the antifouling agent. Usually, in order to avoid specifying the formula of the substance, the supply companies refuse to provide the type of polymer used and do not provide measurable laboratory parameters to ensure the effectiveness of the injection of the substance, so the effectiveness of the substance used is determined in test run. to achieve this purpose, two groups of chemicals, including anti-corrosion and anti-fouling materials, were field tested to determine the actual corrosion rate, LSI, RSI coefficients, the appearance of the coupons installed on the corrosion rack, and the actual consumption.