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<p>Enamel coatings with different thicknesses of 5&#xa0;µm, 15&#xa0;µm and 30&#xa0;µm were deposited on 316L stainless steel. The coated steels were exposed to 600, 700, and 805&#xa0;℃ in an environment of NaCl + water vapor + air. The effect of coating thickness on the hot corrosion behavior was investigated. Results demonstrated that the corrosion resistance of the enamel coating declines with reducing thickness. The 5&#xa0;µm thick coating exhibits minor cracks at 600&#xa0;℃ and peels off at higher temperatures. Small amounts of spalling pits emerge on the surface of the 15&#xa0;µm thick coating at 805&#xa0;℃. The 30&#xa0;µm thick coating effectively protects the steel substrate at the&#xa0;three temperatures&#xa0;studied.</p>

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Effect of Enamel Coating Thickness on the Hot Corrosion Resistance of Coated 316L Steel in NaCl + Water Vapor + Air

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Junan Pan,
  • Shujiang Geng,
  • Minghui Chen,
  • Fuhui Wang

摘要

Enamel coatings with different thicknesses of 5 µm, 15 µm and 30 µm were deposited on 316L stainless steel. The coated steels were exposed to 600, 700, and 805 ℃ in an environment of NaCl + water vapor + air. The effect of coating thickness on the hot corrosion behavior was investigated. Results demonstrated that the corrosion resistance of the enamel coating declines with reducing thickness. The 5 µm thick coating exhibits minor cracks at 600 ℃ and peels off at higher temperatures. Small amounts of spalling pits emerge on the surface of the 15 µm thick coating at 805 ℃. The 30 µm thick coating effectively protects the steel substrate at the three temperatures studied.