Does heat make aluminum corrode faster in salty water? Aluminum resists rust under normal conditions. But salt and high temperatures can break down that resistance. You place five aluminum plates in beakers of salt and ferric chloride solution. A thin layer of vegetable oil sits on top to limit contact with air. Each beaker is kept at a different temperature: 25, 40, 55, 70, or 85 degrees Celsius. You hold these temperatures steady for five days using hotplates. After five days you inspect the plates. The ones stored below 70 degrees show no corrosion. The plates at 70 and 85 degrees both show visible corrosion on their surfaces.