Comparison of the corrosion resistance of Ni2Al3 coating with and without Ni-Re interlayer in dry and wet CO2 gas

Comparison of the corrosion resistance of Ni2Al3 coating with and without Ni-Re interlayer in dry and wet CO2 gas
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有和无Ni-Re夹层的Ni2Al3涂层在干湿CO2气体中的耐蚀性比较

DOI:
10.1016/j.corsci.2019.108121
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发表时间:
2019-07
期刊:
影响因子:
8.3
通讯作者:
Zhou Chungen
Zhou Chungen
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhao XingXing;Li Xiumin;Li Meifeng;Zhou Chungen

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在Fe-Cr-Ni合金表面沉积Ni 2Al 3和Ni 2Al 3/Ni-Re涂层,在650 °C下在干、湿CO2气体中进行氧化。Ni 2Al 3/Ni-Re涂层对干、湿CO2气体的抗氧化性能均优于Ni 2Al 3涂层。这是由于Ni-Re中间层对Ni 2Al 3外层与基体之间的互扩散起到了阻滞作用,从而抑制了腐蚀过程中的内氧化。在CO2湿腐蚀过程中,两种涂层的α-Al 2 O3膜中都存在θ-Al 2 O3。水蒸气通过促进表面快速生长的θ-Al 2 O3的形成,加速了两种涂层在CO2气体中的氧化速率。
Ni2Al3and Ni2Al3/Ni-Re coatings deposited on Fe-Cr-Ni alloy were oxidized in dry and wet CO2gas at 650 °C. Ni2Al3/Ni-Re coating shows higher oxidation resistance to both dry and wet CO2gas than Ni2Al3coating. It is attributed to the retarding effect of Ni-Re interlayer on interdiffusion between Ni2Al3out-layer and substrate, which inhibits the subsequent inner oxidation during corrosion. θ-Al2O3is found in α-Al2O3scales of both coatings during wet CO2corrosion. Water vapor accelerates the oxidation rate of both coatings in CO2gas by promoting the formation of the fast growing θ-Al2O3on the surface.
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