Electrochemical corrosion experiments at temperatures above 100 °C

A description is given of a cell with three electrodes-reference, measuring and current electrodes-which permits electrochemical corrosion measurements at temperatures higher than 100 °C and at corresponding pressures. The system consists of a cell normally used for room temperature work enclosed in a pressure chamber. Inside the pressure chamber a dry gas is automatically kept at such a pressure as to minimize pressure differences across the cell wall. A few examples of measurements on stainless steel and aluminium are discussed. The passivity and pitting behaviour of stainless steel in chloride solutions are given as a function of temperature and the cathodic nature of aluminium at high temperatures is demonstrated.