Ni-201连接incoly 800H合金在MgCl2-KCl传热流体中的高温腐蚀模型

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

High Temperature Materials and Processes Pub Date : 2023-01-01 DOI:10.1515/htmp-2022-0291

Yuxiang Peng, Muhammad A. Imam, Ramana G. Reddy

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引用次数: 0

摘要

摘要:在1073 K共晶mgcl2 -KCl熔盐中，对incoly 800H (800H)进行了与Ni-201合金连接和不连接的长期浸渍腐蚀实验。与Ni-201合金连接时，800H腐蚀速率为4.47±0.26 mg·cm−2·day−1(10−3.55±0.02 A·cm−2)。而未连接Ni-201合金的800H的腐蚀速率为3.00±0.27 mg·cm−2·day−1(10−3.71±0.04 A·cm−2)。因此，Ni-201合金在相互连接的同时，加速了800H在熔融MgCl 2 -KCl盐中的腐蚀速率。此外，通过计算Ni-Fe-Cr合金的吉布斯能和800H在MgCl 2 -KCl盐中的交换电流密度，建立了预测800H合金腐蚀速率的Tafel模型。模型计算的腐蚀速率为10 ~ 3.74 A·cm−2，与实验数据吻合较好。

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High-temperature corrosion model of Incoloy 800H alloy connected with Ni-201 in MgCl₂–KCl heat transfer fluid

Abstract Long-term dipping corrosion experiments on Incoloy 800H (800H) in molten eutectic MgCl 2 –KCl salt at 1,073 K with and without connection with Ni-201 alloy were carried out. While connecting with Ni-201 alloy, the corrosion rate of 800H was 4.47 ± 0.26 mg·cm −2 ·day −1 (10 −3.55±0.02 A·cm −2 ). However, the corrosion rate for the 800H that was not connected to the Ni-201 alloy was 3.00 ± 0.27 mg·cm −2 ·day −1 (10 −3.71±0.04 A·cm −2 ). Therefore, Ni-201 alloy accelerates the corrosion rate of 800H in the molten MgCl 2 –KCl salt while connecting to each other. In addition, based on the calculation of Gibbs energy of Ni–Fe–Cr alloy and exchange current density of 800H in MgCl 2 –KCl salt, a new Tafel model was developed to predict the corrosion rate of 800H alloys. The corrosion rate calculated by the new model is 10 −3.74 A·cm −2 , which agrees with the experimental data.

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来源期刊

High Temperature Materials and Processes 工程技术-材料科学：综合

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

3.9 months

期刊介绍： High Temperature Materials and Processes offers an international publication forum for new ideas, insights and results related to high-temperature materials and processes in science and technology. The journal publishes original research papers and short communications addressing topics at the forefront of high-temperature materials research including processing of various materials at high temperatures. Occasionally, reviews of a specific topic are included. The journal also publishes special issues featuring ongoing research programs as well as symposia of high-temperature materials and processes, and other related research activities. Emphasis is placed on the multi-disciplinary nature of high-temperature materials and processes for various materials in a variety of states. Such a nature of the journal will help readers who wish to become acquainted with related subjects by obtaining information of various aspects of high-temperature materials research. The increasing spread of information on these subjects will also help to shed light on relevant topics of high-temperature materials and processes outside of readers’ own core specialties.