Invited Speaker

Assoc. Prof. Zhao Shen

Shanghai Jiao Tong University
E-mail: shenzhao081@sjtu.edu.cn

Title: Mechanistic Study on the Influence of Pre-Corrosion on the Oxidation Behavior of FeCrAl coating under Accident Conditions

Profile:

Dr. Shen Zhao, Associate Professor and Doctoral Supervisor at the School of Materials Science and Engineering, Shanghai Jiao Tong University. Recognized as a National Young Talent (Overseas Excellent Young Scientist), Shanghai Leading Talent (Overseas), Shanghai Pujiang Scholar, and CNNC Young Elite (Jingying). Ranked among the World's Top 2% Scientists. Research Focus: Design, fabrication, and service behavior of corrosion-resistant metallic materials/coatings. Principal Investigator of over 10 major research projects, including National Natural Science Foundation of China (NSFC) Excellent Young Scientists Fund (Overseas), NSFC General Program, NSFC Basic Research Program for Young Students (as Advisor), Key R&D Program for Young Scientists, Shanghai "Explorer Program" Project, Shanghai "Pujiang Scholar" Project, CNNC Young Elite (Jingying) Project, CNNC Innovation Leadership Fund Project, External Collaboration Projects with Shanghai Nuclear Engineering Research & Design Institute

Publications & Patents:

Granted: 12 Chinese patents, 1 U.S. patent

Published: 80+ SCI-indexed papers, including 60+ as first/corresponding author, 7 ESI Highly Cited Papers, 3 ESI Hot Papers, 2 cover-featured articles in journals such as:

Progress in Materials Science (1 paper)

Nature Communications (1 paper)

Acta Materialia (7 papers)

Corrosion Science (30 papers)

Editorial Roles:

Editor-in-Chief, High-Temperature Corrosion of Materials (formerly Oxidation of Metals)

Associate Editor, Journal of Materials Science

Youth Editorial Board Member:

Journal of Materials Science & Technology

Corrosion Communications

Acta Metallurgica Sinica (Chinese/English editions)

Journal of Chinese Society for Corrosion and Protection

Abstract:

Experimental Kinetic Data Analysis indicate that FeCrAl coatings subjected to prior uniform corrosion treatment exhibit significantly higher mass gain under identical high-temperature steam oxidation conditions (1000°C-2h, 1200°C-2h, 1400°C-2h) compared to untreated samples. Comparative tests reveal that untreated samples maintain structural integrity after 2 hours of exposure to 1400°C steam, whereas pre-corroded samples undergo destructive oxidation under the same conditions.This performance degradation is attributed to the detrimental effect of the hematite (Fe₂O₃) layer formed during prior uniform corrosion on the high-temperature oxidation resistance of FeCrAl cladding materials. Microstructural analysis demonstrates that during high-temperature steam oxidation, the phase transformation of hematite particles (from prior corrosion) into iron-aluminum spinel (FeAl₂O₄) inhibits the formation of a protective α-alumina (Al₂O₃) layer. This leads to a sharp deterioration in the material's resistance to high-temperature steam oxidation.By simulating more realistic service conditions of nuclear fuel cladding, this study elucidates the mechanism by which prior corrosion influences the oxidation behavior of FeCrAl coatings under accident scenarios.