At TATA Chemical Haldia factory, they had to paint an acid storage tank with 28 mtr diameter and height of 10 mtr. High humidity conditions during monsoons posed a problem of condensation during the painting job inside the surface of the tank leading to dilution of adhesive and loss of its strength. As a consequence, the rubber lining was not binding properly and the coating process had to be repeated. Further, condensation led to blooming and peeling of paint which weakened the coating, causing delays in the project.
TDS (Technical Drying Services) installed Dehumidifier of various capacities to control RH to 60-65 % in the acid storage tank during the painting job.
The dehumidifier removed moisture from the tank and helped to prevent condensation between coats which resulted in smooth sticking of rubber lining to the surface.