Effect of CeO2 on the H2O/NaCl-Induced Corrosion Behavior of Ni-Co Coating at 650 °C

IF 2.9 2区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Acta Metallurgica Sinica-English Letters Pub Date : 2025-02-18 DOI:10.1007/s40195-025-01818-0

Yifei Gao, Peng Zhang, Pan Ren, Yingfei Yang, Guofeng Han, Wenbo Du, Wei Li, Qiwei Wang

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Abstract

The corrosion behavior of Ni-Co-CeO₂ composite coating was investigated under a simulated high-temperature marine atmosphere alongside Ni-Co coating. The corrosion kinetics, phase composition and microstructure evolution of the coatings were analyzed. A multi-layered oxide scale formed due to the synergistic corrosion by H₂O and NaCl. The growth mechanism of the Co₃O₄, Fe₃O₄, Fe₂O₃, CoFe₂O₄, NiFe₂O₄ and NiO in the scale was proposed according to the distribution of the CeO₂ particles. Compared to Ni-Co cating, the Ni-Co-CeO₂ coating exhibited superior corrosion resistance in the H₂O/NaCl steam, which is beacause the CeO₂ exerted a blocking effect on retarding the diffusion of Fe atoms and corrosive medium, contributing to a reduced corrosion rate and an improved oxide adhesion compared to Ni-Co coating.

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CeO2对650℃Ni-Co涂层H2O/ nacl腐蚀行为的影响

研究了Ni-Co- ceo2复合涂层与Ni-Co涂层在模拟高温海洋大气中的腐蚀行为。分析了涂层的腐蚀动力学、相组成和显微组织演变。由于H2O和NaCl的协同腐蚀，形成了多层氧化垢。根据CeO2颗粒的分布，提出了Co3O4、Fe3O4、Fe2O3、CoFe2O4、NiFe2O4和NiO在水垢中的生长机理。与Ni-Co涂层相比，Ni-Co-CeO2涂层在H2O/NaCl蒸汽中表现出更强的耐腐蚀性，这是因为CeO2对Fe原子和腐蚀介质的扩散起到了阻滞作用，与Ni-Co涂层相比，降低了腐蚀速率，提高了氧化物的附着力。

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来源期刊

Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

6.60

自引率

14.30%

发文量

122

审稿时长

2 months

期刊介绍： This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.