EFFECTS OF ETHANOLAMINE, PH CHANGE, AND INCREASED HYDRAZINE LEVELS ONDEPOSIT-COVERED ALLOY-600 AND BRASS CORROSION

Chemical dissolution tests and electrochemical tests were carried out on alloy 600 (UNS N06600) specimens covered with synthetic deposit sim ulating the tube deposits in the steam generators at Indian Point 2 St ation in Buchaman, New York. The tests showed that the introduction of ethanolamine (ETA) and a moderate increase in pH gave rise to lower c orrosion rates, but enhancement of hydrazine levels caused than to ris e. In tile case of brass, both types of tests showed that raising the pH caused thr corrosion rates to increase, but the introduction of ETA led to a mild decrease in these rates.