Effect of Fe addition on corrosion behavior of Ni-xFe-5Cr alloys at 570°C in air containing salt vapor

被引：0
|
作者：
Yoneda, Suzue [1 ]
Kogin, Takashi [2 ]
Ishikawa, Eiji [3 ]
Murasue, So [4 ]
Hayashi, Shigenari [1 ]
机构：
[1] Hokkaido Univ, Fac Engn, Div Mat Sci & Engn, N13 W8,Kita Ku, Sapporo, Hokkaido 0608628, Japan
[2] Dai Ichi High Frequency Co Ltd, Kawasaki, Kanagawa, Japan
[3] EBARA Environm Plant Co Ltd, Ota Ku, Tokyo, Japan
[4] EBARA Corp, Fujisawa, Kanagawa, Japan
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2024年 / 75卷 / 12期
关键词：
high-temperature corrosion; oxygen-chlorine containing atmosphere; salt vapor; NI-CR ALLOYS; PART I; SIMULTANEOUS EROSION; COMMERCIAL ALLOYS; GAS-MIXTURES; MECHANISMS; OXIDATION; NICKEL; METALS; ATTACK;
D O I：
10.1002/maco.202414399
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The high-temperature corrosion behavior of Ni-xFe-5Cr alloys (x = 0, 10, or 30 wt.%) was investigated in air containing alkali salt vapor at 570 degrees C to clarify the effect of Fe on the corrosion resistance. Fe addition to Ni-5Cr was found to improve the corrosion resistance under the present conditions. In the case of Ni-5Cr, NiCl2 was formed beneath the NiO scale during the initial stage of corrosion, and it grew thicker over time and then evaporated. The formation and evaporation of NiCl2 resulted in a porous scale that underwent spallation resulting in mass loss. In the Fe-containing alloys, (Fe, Ni, Cr)(3)O-4 spinel and Fe3O4 decreased the partial pressures of oxygen and chlorine and thus prevented the generation of NiO and NiCl2, leading to superior corrosion resistance compared with Ni-5Cr.
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收藏
页码：1628 / 1638
页数：11
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