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<p>The corrosion behavior of B30 copper-nickel alloy fabricated with various cooling methods in simulated marine environment was studied. The analysis reveals that a decrease in cooling rate leads to a diminished capacity for corrosion resistance of B30 alloy, and the water-cooled specimen possesses superior corrosion resistance, attributing to the key factors of grain size and the protective effect of passive film. The dense and uniform passivation film produced on the water-cooled specimen significantly enhances its anti-corrosion performance. Moreover, the alloy treated by water cooling method displays the smallest susceptibility to metastable and stable pits, and the passive film on its surface exhibits good self-repairing property. By contrast, plentiful pits with different sizes appear and obvious intergranular corrosion characteristics are observed on the furnace-cooled specimen, presenting the most severely corrosion degree. And, pits predominantly occur around grain boundaries (GBs). Furthermore, the substrate of B30 alloy mainly undergoes selected dissolution of Cu element.</p>

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Influence of Various Cooling Methods on Corrosion Behavior of B30 Alloy in NaCl Solution Containing CO32−

  • 期刊论文

  • 发表日期：

    2025年2月17日

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  • S. T. Guo,
  • M. Zhu,
  • Y. F. Yuan,
  • S. M. Yin,
  • S. Y. Guo

摘要

The corrosion behavior of B30 copper-nickel alloy fabricated with various cooling methods in simulated marine environment was studied. The analysis reveals that a decrease in cooling rate leads to a diminished capacity for corrosion resistance of B30 alloy, and the water-cooled specimen possesses superior corrosion resistance, attributing to the key factors of grain size and the protective effect of passive film. The dense and uniform passivation film produced on the water-cooled specimen significantly enhances its anti-corrosion performance. Moreover, the alloy treated by water cooling method displays the smallest susceptibility to metastable and stable pits, and the passive film on its surface exhibits good self-repairing property. By contrast, plentiful pits with different sizes appear and obvious intergranular corrosion characteristics are observed on the furnace-cooled specimen, presenting the most severely corrosion degree. And, pits predominantly occur around grain boundaries (GBs). Furthermore, the substrate of B30 alloy mainly undergoes selected dissolution of Cu element.