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  11. Effect Of Interlayers On Microstructure And Corrosion Resistance Of 304/45 Stainless Steel Cladding Plate

Effect of Interlayers on Microstructure and Corrosion Resistance of 304/45 Stainless Steel Cladding Plate

Yongtong Chen1, Yi Ding1

  • 1College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China.

Materials (Basel, Switzerland)
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Nickel-based interlayers (NiP, NiCuP) prevent carbon diffusion and sensitization in stainless steel cladding. The NiCuP interlayer significantly enhances corrosion resistance, forming a dense passive film.

Area of Science:

  • Materials Science
  • Corrosion Engineering
  • Metallurgy

Background:

  • High-temperature preparation of stainless steel cladding plates leads to carbon diffusion from carbon steel.
  • Carbon diffusion causes carbide precipitation at grain boundaries (450-850 °C), initiating intergranular sensitization and reducing corrosion resistance.

Purpose of the Study:

  • To design and evaluate NiP and NiCuP interlayer alloys for blocking carbon diffusion.
  • To investigate the impact of these interlayers on the microstructure and corrosion resistance of stainless steel cladding.

Main Methods:

  • Optical microscopy and scanning electron microscopy (SEM) for microstructural analysis.
  • Electrochemical tests to assess corrosion resistance.
  • Analysis of intergranular corrosion susceptibility and pitting potential.
Keywords:
carbon diffusioncorrosion resistanceinterlayerstainless steel cladding plate

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Main Results:

  • Unprotected 304/45 specimens showed severe carbon diffusion and poor corrosion resistance.
  • NiP and NiCuP interlayers improved corrosion resistance to varying degrees.
  • The 304/NiCuP/45 specimen exhibited excellent performance: 0.25% intergranular corrosion susceptibility and 0.336 V pitting potential.

Conclusions:

  • NiCuP interlayers effectively mitigate carbon diffusion and intergranular sensitization in stainless steel cladding.
  • The 304/NiCuP/45 composite demonstrates superior corrosion resistance due to a denser passive film with n-type semiconductor characteristics.