Boiler tubes are exposed to several damaging factors because of their specific utilization conditions. The most important damaging factor in boiler tubes is corrosion. The causes of damage in boiler tubes in petrochemical industries are investigated in this study. These investigations include visual observations, scanning electron microscopy (SEM) images, composition and XRD analysis of scales, measurements of surface density of scales and elemental analysis of feed water and wastewater of boilers. In order to prevent damaging and corrosion in boilers it is proposed to enhance the quality of DM feed water, so that intense variations of pH and chlorine content in feed water is minimized. Meanwhile, boiler feed water treatment based on application of both mineral and organics additives is recommended to change to application of only organic additives.
