Effects of yttrium on the oxidation behavior of 304 stainless steel with coating by laser remelting in high temperature water
Effects of Y _2 O _3 on the oxidation behavior of 304 SS with coating by laser remelting after exposed to 290 °C water containing 3 ppm O _2 for 72 h were investigated. It was found that the corrosion behavior of remelted layer on 304 SS with the addition of Y _2 O _3 was completely different from t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ab6803 |
| Summary: | Effects of Y _2 O _3 on the oxidation behavior of 304 SS with coating by laser remelting after exposed to 290 °C water containing 3 ppm O _2 for 72 h were investigated. It was found that the corrosion behavior of remelted layer on 304 SS with the addition of Y _2 O _3 was completely different from that of 304 SS and remelted layer on 304 SS without the addition of Y _2 O _3 . More Cr _2 O _3 hematite oxides were formed around strengthening phase near the Y _2 O _3 particles. With increasing exposure time, a little number of Fe _3 O _4 spinel oxides were continuing formed on the surface outside the Mn/Si enrichment area. The growth of Fe _3 O _4 spinel oxides were hindered because of the massive Cr _2 O _3 hematite oxides around the Y _2 O _3 particles. Some small Fe _3 O _4 spinel oxides were formed. Finally, the types of oxide film formed on the surface of the remelted layer with the addition of Y _2 O _3 were mainly Cr _2 O _3 hematite oxides and a few of fine FeCr _2 O _4 spinel oxides. The addition of Y _2 O _3 in laser remelting layer can obviously change the corrosion behavior of 304 SS exposed to high temperature water and the related mechanisms are also discussed. |
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| ISSN: | 2053-1591 |