Study on the high-temperature oxidation behavior of high strength steels for photovoltaic applications

LIU Yujia; RAN Changrong; GUO Taixiong; JIN Yongqing; LI Qinglong; YU Hengxiang; CAO Guangming

doi:10.7513/j.issn.1004-7638.2026.01.020

Volume 47 Issue 1

Feb. 2026

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LIU Yujia, RAN Changrong, GUO Taixiong, JIN Yongqing, LI Qinglong, YU Hengxiang, CAO Guangming. Study on the high-temperature oxidation behavior of high strength steels for photovoltaic applications[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 171-179. doi: 10.7513/j.issn.1004-7638.2026.01.020

Citation:

LIU Yujia, RAN Changrong, GUO Taixiong, JIN Yongqing, LI Qinglong, YU Hengxiang, CAO Guangming. Study on the high-temperature oxidation behavior of high strength steels for photovoltaic applications[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 171-179. doi: 10.7513/j.issn.1004-7638.2026.01.020

Citation:

LIU Yujia, RAN Changrong, GUO Taixiong, JIN Yongqing, LI Qinglong, YU Hengxiang, CAO Guangming. Study on the high-temperature oxidation behavior of high strength steels for photovoltaic applications[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 171-179. doi: 10.7513/j.issn.1004-7638.2026.01.020

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Study on the high-temperature oxidation behavior of high strength steels for photovoltaic applications

doi: 10.7513/j.issn.1004-7638.2026.01.020

1.
State Key Laboratory of Digital Steel, Northeastern University, Shenyang 110819, Liaoning, China
2.
Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma’anshan 243002, Anhui, China
3.
Pangang Group Panzhihua Iron and Steel Research Institute Co., Ltd., State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China
4.
Pangang Group Panzhihua Iron & Steel Vanadium Co., Ltd., Panzhihua 617000, Sichuan, China

More Information

Received Date: 2025-08-22
Accepted Date: 2025-09-15
Rev Recd Date: 2025-09-10

Available Online: 2026-02-25

Publish Date: 2026-02-25

Abstract

Abstract

The high temperature oxidation behavior of high-strength steels S350GD and S420GD for photovoltaic applications was systematically studied by a high-temperature thermal gravimetric analyzer (TGA) under dry and humid atmospheres. X-ray diffraction (XRD) and electron probe microanalysis (EPMA) were used to characterize the phase composition, cross-sectional morphologies and element distribution of the oxide scales. The results show that the oxidation weight gain curves of both S350GD and S420GD follow a parabolic law. Compared to S350GD, the oxide scale formed on S420GD is thinner and exhibits a higher fraction of high-valence iron oxides. A silicon-enriched interfacial layer was detected at the oxide/metal substrate interface in S420GD, where SiO₂ and Fe₂SiO₄ phases synergistically reduce the diffusion coefficient of Fe²⁺ ions. When comparing oxidation under dry and humid atmospheres, both steels show similar oxides growth mechanisms; however, the oxide scales are thicker and the content of low-valence iron oxides is increased in humid environments. Moreover, the oxide scales formed under humid conditions contain a significant density of pores and microcracks, which act as fast diffusion pathways for ionic species, thereby accelerating the oxidation process.
- high strength steels for photovoltaic applications,
- oxide scale,
- high temperature oxidation,
- silicon,
- humid atmosphere

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References(26)

References

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