Coal fired powerplants are very high-pressure, high-temperature systems subject to corrosion, duh.
If a utility gets 35-years of production with routine maintenance that's a good plant.
The plant-by-plant retirement needs are not well-understood yet to achieve the rapid transition away from coal use. Here the authors found that operational lifetimes of existing units must be reduced to approximately 35 years to keep warming well below 2 °C or 20 years for 1.5 °C, even if no new...
www.nature.com
Even if no new plants are built, the lifetimes of existing units are reduced to approximately 35 years in a well-below 2 °C scenario or 20 years in a 1.5 °C scenario.