[en] A report is presented of corrosion information obtained during the third examination of samples of N Reactor control rod cooling system materials after 297 days exposure to the recirculating demineralized water in the right side control rod cooling system test facility. All samples of N Reactor control rod cooling system aluminum and admiralty brass materials experienced corrosion averaging less than 0.60 mils per year during the 297 day exposure period. The A 106-B carbon steel material samples experienced corrosion averaging 1.1 mils per year during the 297 day exposure period. The average yearly corrosion rates and individual sample corrosion rates for the 297 day period are presented