Study on corrosion behaviors of stainless steels and refractory alloys in pseudo-critical zone
Creators
- 1. Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu (China)
Description
The general corrosion behavior of three super alloys and four austenitic stainless steels was investigated in 380℃/25 MPa deionized water. Morphology and composition of the surface oxide scale after various exposure time were analyzed through FEG-SEM and EDS. For all the tested materials, the weight gain (WG) represents no apparent regularity while the weight loss (WL) follows typical logarithmic law. HR3C showed the least WL while 347 the most, an order of magnitude difference. All the exposed samples developed relatively enact and compact dual oxide layer, with the outer layer rich in O, depleted in Cr, Ni and lack of Mo. Several alloys (316Ti, 718, 825, 800H and HR3C) displays pitting. The pits were rich in Nb and Ti, depleted in Cr and Ni, and lack of Mn and Mo, based on the alloy composition. (authors)
Additional details
Publishing Information
- Journal Title
- Nuclear Power Engineering
- Journal Volume
- 34
- Journal Issue
- 1
- Journal Page Range
- p. 157-161
- ISSN
- 0258-0926
INIS
- Country of Publication
- China
- Country of Input or Organization
- China
- INIS RN
- 47112226
- Subject category
- S36: MATERIALS SCIENCE; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- AUSTENITIC STEELS; CORROSION; GAIN; HEAT RESISTING ALLOYS; LAYERS; LOSSES; MORPHOLOGY; OXIDES; PRESSURE RANGE MEGA PA 10-100; SCANNING ELECTRON MICROSCOPY; SPECTROSCOPY; STAINLESS STEELS; SUPERCRITICAL STATE; SURFACES; WATER; WATER COOLED REACTORS; WEIGHT; ZONES
- Descriptors DEC
- ALLOYS; AMPLIFICATION; CARBON ADDITIONS; CHALCOGENIDES; CHEMICAL REACTIONS; ELECTRON MICROSCOPY; HEAT RESISTANT MATERIALS; HIGH ALLOY STEELS; HYDROGEN COMPOUNDS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MICROSCOPY; OXYGEN COMPOUNDS; PRESSURE RANGE; PRESSURE RANGE MEGA PA; REACTORS; STEELS; TRANSITION ELEMENT ALLOYS
Optional Information
- Notes
- 8 figs., 4 tabs., 13 refs.