Influence of Temperature on the Corrosion Behavior and the Hydrogen Evolution Reaction on Chromium in LiBr Solution

Autor: Guiñón-Pina, Virginia, Igual-Muñoz, Anna, Garcia-Anton, José
Zdroj: ECS Transactions; April 2010, Vol. 25 Issue: 37
Abstrakt: Lithium Bromide aqueous solutions used as absorbent in refrigeration machines can cause serious corrosion problems which also facilitate the hydrogen evolution reaction (HER) in the cathodic regions. Hydrogen generation is an important problem in the operating conditions of adsorption machines because they operate under vacuum condition and the efficiency of the system decreases. Chromium is one of the alloying elements of Stainless Steels. The objective of this work is to study the anodic and cathodic behavior of chromium and the HER in 992 g/l LiBr at different temperatures (25, 50 and 75 ºC) using various electrochemical techniques: Open Circuit Potential (OCP), potentiodynamic and galvanostatic measurements and image analysis.
Databáze: Supplemental Index