THE CORROSION OF CARBON-STEEL IN LITHIUM BROMIDE SOLUTION AT MODERATETEMPERATURES

The corrosion of carbon steel was studied in various LiBr solutions of 1-25 m (mol kg-1-H2O) at 100-160-degrees-C in relation to absorption refrigeration and heat pump systems. Increase in temperature suppresse d corrosion slightly in 2 m solution, whereas it promoted corrosion in 23 m solution. The increase in LiBr concentration decreased corrosion slightly at 100-degrees-C, while it accelerated it at 160-degrees-C. Mixed behaviour was observed in intermediate conditions of temperature and concentration. The corrosion morphology was general. Magnetite pa rticles adhered on the surface. These complicated features of the corr osion process are described in relation to the properties of the solut ion, such as the activities of the bromide ion and water, the viscosit y of the solution, as well as the adhered corrosion products.