In order to design a NiCr coating with the strongest corrosion resistance, the corrosion behavior of Ni, Ni10Cr and Ni20Cr coatings was studied using molecular dynamics, in which Ni20Cr coating exhibited the best corrosion resistance. The corrosion behavior of Fe9Cr heat-resistant steel with or without Ni20Cr coating in a supercritical CO at 650 ℃ and 15 MPa for 1000 h was carried out by corrosion test, which significantly reduced the experimental period and cost. The Ni20Cr coating was intact and uniform after exposure for 1000 h. A dense and continuous Cr-rich oxide film with low growth stress could rapidly formed on the Ni20Cr coating. The Ni20Cr coating could effectively enhance the corrosion and carburization resistance of Fe9Cr heat-resistant steel.

中文翻译：

---

基于ReaxFF分子动力学理论分析和实验验证的超临界CO2镍铬涂层新设计方法


为了设计出具有最强耐腐蚀性能的NiCr涂层，利用分子动力学研究了Ni、Ni10Cr和Ni20Cr涂层的腐蚀行为，其中Ni20Cr涂层表现出最好的耐腐蚀性能。通过腐蚀试验对带或不带Ni20Cr涂层的Fe9Cr耐热钢在超临界CO中650℃、15MPa下1000h的腐蚀行为进行了腐蚀试验，显着缩短了实验周期和成本。暴露1000h后Ni20Cr镀层完好、均匀。 Ni20Cr涂层上能快速形成致密、连续、低生长应力的富Cr氧化膜。 Ni20Cr涂层能有效增强Fe9Cr耐热钢的耐蚀性和耐渗碳性能。