Corrosion studies under conditions of thermal desalination I. Pilot test loops for the simulation of plant conditions

Abstract

This work is dedicated t o Prof. Dr.-Ing. h.c. mult. K. Winnacker on the occasion of his 75th birthday SummaryIn a pilot test loop conditions of thermal sea-water desalination were simulated, i. e., temperatures between room temperature and 120 "C, oxygen contents between saturation and 2 ppb, flow velocities up to 6 mfs and various pH values were controlled over a long time with appropriate regulation devices. In two specimen chambers of different design corrosion rates of non alloyed and low alloyed steels were measured and compared by weight loss and polarisation resistance. Good agreement was obtained in 100 hr experiments and short duration parameter studies. This work contains the experimental and methodical requirements for investigation into the influence o f oxygen, flow velocity, pH value and impurities during sea-water desalination which will be presented in part II o f the publication.