Abstract
Abstract Sulfuric acid dew point corrosion is still a matter of concern with respect to early failure of heating elements used for air preheating in thermal power plants. Therefore, corrosion protection by means of porcelain enamel coatings is widely used. However, insufficient protective properties of the coating can result in a drastic decrease in service life. In the present study, failure analysis was comparatively performed on damaged heating elements showing different degrees of damage after approximately 1.5 years in service in a thermal power plant. The analytical results indicated that a lower degree of damage was observed for the heating element having higher content of silica. The protective properties of coatings decreased with the increasing pore density formed in the coating layer. The heating element coated with a harder porcelain layer was less severely attacked.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
