Corrosion and Limescale in the Cooling Loops User: Denka Advantech, Singapore Denka Advantech has been facing several problems with the water quality in their cooling systems. In the first cooling loop, there has been a lot of brown water found in the sump of the cooling towers. The customer tried to rinse these with clean water to flush out rust particles. Treating the water with chemicals is not possible, as the pipes are a mixed installation made from copper and (stainless) steel. Therefore every kind of chemical treatment would harm the surfaces. Water samples were taken at the return line of the cooling loop right before entering the cooling tower. The picture shows that the water in the first bottle is rusty brown. It was assumed from the customer, the color of the water is coming fr

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