`Mexican airline hot corrosion engine failure`

Tom uses the NiCrAlY coating corrosion-rate-vs-temperature diagram to explain why Mexican carriers experienced sulfidation failures on turbine blades. The operational cause: skipping the runway preheat warmup and instead climbing to altitude with engines passing slowly through the 800–1000°C hot-corrosion window at full power.

This is the type of corrosion that occurred on those turbine blades. What you need to understand is when you start that engine, it starts out cold and it has to go through this region, but you don't want it to stay in this region very long. About 900 degrees centigrade is about 1650 Fahrenheit, and that's sort of what you might get with some of the takeoff power in this particular part of the engine.