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The Corrosion Resistance Mechanisms of the Mo-Coated 304 Stainless Steel in Molten Nacl-Mgcl-Kcl Salts

SSRN, ISSN: 1556-5068
2024
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  • Usage
    147
    • Abstract Views
      121
    • Downloads
      26

Article Description

The dissolved corrosion 304 stainless plates in NaCl-MgCl-KCl molten salt at 700 °C was substantially mitigated by their surfaces coated with magnetron-sputtered molybdenum (Mo) coatings. After the 200-h immersion, the weight loss rate of the 304 stainless plates was reduced from ~17% to ~5% for its single side coated with Mo. The corrosion-resistance mechanisms depended on the Mo-enriched layer which effectively suppressed the outward diffusion of alloy elements and trapped Cr into Cr-O. However, the Mo-enriched layer locally fell off after four thermal cycles (200 h interval), maybe for a large mismatch of thermal expansion coefficients between Mo and 304 stainless steel.

Bibliographic Details

Sijie Liu; Li Wang; Bingsheng Li; Renda Wang; Kun Liang; Fangfang Ge; Ping Yu; Mengyu Gao; Yang Si; Chuang Zhu

Elsevier BV

Multidisciplinary; Mo coating; 304 stainless steel; Molten chloride salt; High-temperature corrosion; Thermal cycling; Interdiffusion

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