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<p>The corrosion resistance of compact materials and composite coatings in the (TiB<sub>2</sub>–SiC)–(Ni–20% Cr) system was studied in a 3% NaCl solution simulating seawater using potentiodynamic polarization curves. Both the compact materials and the composite coatings in the (TiB<sub>2</sub>–SiC)–(Ni–20% Cr) system exhibited high corrosion resistance in aggressive environments. It was established that the corrosion resistance of the coatings in a 3% NaCl solution could be significantly increased by adjusting its composition: specifically, by reducing the nickel content and increasing the TiB<sub>2</sub>–SiC content. The starting materials for spraying were (TiB<sub>2</sub>–SiC)–x(Ni–20% Cr) powders with x = = 20, 30, and 40 wt.%. Coatings were deposited onto Steel 3 substrates by detonation and plasma spraying. For detonation spraying (Dnipro-5M installation), composite powders with a particle size fraction of −63+40 μm were used. Plasma spraying (UPU-3D installation) employed powders with a size fraction of −120+63 μm. The spraying process proceeded with a mixture of argon and hydrogen as plasma-generating gases in an open atmosphere. The results demonstrate the feasibility of using detonation- and plasma-sprayed coatings in the (TiB<sub>2</sub>–SiC)–(Ni–20% Cr) system with enhanced properties in mechanical engineering and aerospace applications.</p>

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Structure and Corrosion Behavior of (TiB2–SiC)–(Ni–20% Cr) Composite Coatings in Natural Electrolytes

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • V. L. Syrovatka,
  • V. M. Talash,
  • A. V. Minitskyi,
  • A. A. Bondarenko,
  • K. M. Galtsov,
  • O. Ye. Terentiev,
  • T. M. Chevychelova,
  • V. T. Varchenko,
  • I. S. Martseniuk

摘要

The corrosion resistance of compact materials and composite coatings in the (TiB2–SiC)–(Ni–20% Cr) system was studied in a 3% NaCl solution simulating seawater using potentiodynamic polarization curves. Both the compact materials and the composite coatings in the (TiB2–SiC)–(Ni–20% Cr) system exhibited high corrosion resistance in aggressive environments. It was established that the corrosion resistance of the coatings in a 3% NaCl solution could be significantly increased by adjusting its composition: specifically, by reducing the nickel content and increasing the TiB2–SiC content. The starting materials for spraying were (TiB2–SiC)–x(Ni–20% Cr) powders with x = = 20, 30, and 40 wt.%. Coatings were deposited onto Steel 3 substrates by detonation and plasma spraying. For detonation spraying (Dnipro-5M installation), composite powders with a particle size fraction of −63+40 μm were used. Plasma spraying (UPU-3D installation) employed powders with a size fraction of −120+63 μm. The spraying process proceeded with a mixture of argon and hydrogen as plasma-generating gases in an open atmosphere. The results demonstrate the feasibility of using detonation- and plasma-sprayed coatings in the (TiB2–SiC)–(Ni–20% Cr) system with enhanced properties in mechanical engineering and aerospace applications.