Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
ISSN-L : 0917-0480
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The Effect of Hydrazine Addition for the Behavior of Flow Accelerated Corrosion under the Oxidizing Environment
Yoshinori HashimotoKazutoshi FujiwaraYutaka YamaneAkihiro Sato
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2016 Volume 65 Issue 5 Pages 205-210

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Abstract

An all volatile treatment (oxidizing) (AVT (O)) is expected as countermeasures against flow accelerated corrosion (FAC) of carbon steel piping at a power plant. Dissolved oxygen (DO) in the feed water inhibits FACs while DO can cause local corrosions at high temperature. A hydrazine (N2H4) eliminates DO at high temperature. We discussed the FAC mitigation effect of AVT (O+N2H4) where N2H4 was added to the feed water under AVT (O) condition. From the corrosion test of carbon steel pipes in NH3 solution at 150 ℃ under the high flow rate condition, FAC inhibition effect of DO at 15 μg/L is indicated in the presence of N2H4.

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© 2016 Japan Society of Corrosion Engineering
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