51 TF 52 TF 53 When corrosion is controlled by O2 diffusion, the corrosion rate approximately doubles for every 30C rise in temperature. Increase in temperature affects the chemical composition and physical properties of the electrolyte. Thermo-galvanic effects arise in which the potential of the metal varies with temperature Proper heat treatment means heating and cooling metals with the control of time only. Proper heat treatment means heating and cooling metals with the control of time and temperature. TF 54 TF 55 TF