BibTeX:

@article{IJIRSTV2I4008,
     title={Impact of Boiler Water Chemistry on Waterside Tube Failures},
     author={Amrita kumari, Suchandan Kumar Das and Prem Kumar Srivastava},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={2},
     number={4},
     pages={28--35},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV2I4008.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

This paper emphasis on the study of typical premature failure of water wall tubes of two thermal power plant boiler of same capacity (250 MW) and same operational parameter but with different boiler water chemistry. The investigation concludes on the waterside corrosion in both of the case. One boiler is running with coordinated phosphate treatment (CPT) and another with all volatile treatment (AVT). The causes of corrosion were discovered and proposed measures for their elimination were given. Visual examination, chemical analysis of deposits, oxide scale thickness measurement and micro structural examination were carried to ascertain the probable cause/causes of failure. From the investigation, it was finally concluded that the combination of localized high tube metal temperature and wall thinning due to under deposit corrosion led to the premature tube failure in boiler running with coordinated phosphate treatment and localized pitting corrosion in boiler running with AVT. Based on the results and discussions, a possible way to combat the corrosion was proposed.

Boiler Water Chemistry, Boiler Tube Failure, Caustic Gauging Corrosion, Pitting Corrosion, Boiler Deposits