Curious about the yellow color of these turbine blades. Any insights you know why they appear this way?
Which one you guess.:- The presence of a thermal barrier coating (TBC) or the sulfur content in the fuel?
Photo reference from Yugadanavi 300 MW CCPP Major Inspection
Possible reasons are :-
- The yellow coloration on the turbine blades could be due to several factors, including the presence of a thermal barrier coating (TBC) or the effects of sulfur compounds in the fuel used.
- Thermal Barrier Coating (TBC): TBCs are applied to turbine blades to protect them from the high temperatures and corrosive environments found in engines. They can sometimes have a yellowish hue depending on the specific materials used 161718
- Sulfur Content in Fuel: High sulfur content in fuel can lead to the formation of sulfur compounds during combustion. These compounds can cause discoloration and corrosion on turbine blades. The sulfur can react with other elements to form deposits that may appear yellowish.
It’s also worth noting that the color of turbine blades can be influenced by other factors such as the type of fuel used, the combustion environment, and the operational history of the turbine. If the discoloration is a concern, a detailed analysis by material scientists or engineers would be necessary to determine the exact cause and any potential impacts on turbine performance
