Imac 2022 stopped trolling. The cooler here has always worked quietly, but the temperature of the blown air has increased significantly. In fact, under load over time, temperatures reach the same 80 degrees - but here the problem is more likely in the general modesty of the cooling system for the desktop processor. As for corrosion, let's wait and see. Now I probably would not apply it to the cooling system, you will find its horseradish for replacement