Heat recovery steam generator (HRSG) cleaning for sulfur dioxide deposit removal eliminates acidic contaminants formed from exhaust gases. Sulfur dioxide reacts with moisture, creating corrosive deposits on heat transfer surfaces that reduce efficiency and accelerate metal degradation.

The process includes isolating the HRSG, controlled water or chemical cleaning using alkaline or neutralizing agents, and thorough rinsing. Proper cleaning restores heat transfer performance, reduces corrosion risk, and extends the service life of HRSG components and operational reliability.