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<p>In marine seawater pipelines and coolers, copper-nickel alloys such as B10 and B30 are the main material of choices. Due to the differences in nickel content, the corrosion potentials of these two alloys are significantly different. When the pipelines of these two alloys are connected with cooling equipment, there is a risk of electric couple corrosion. In order to effectively control the electric couple corrosion between B10/B30 and prolong the service life of seawater pipeline systems, this study uses an electrochemical method to test the electric couple potential and electric couple current of B10 and B30 tubular pairs in static seawater. In addition, the electric couple corrosion rate with time is also analyzed in depth. Through a mixed potential theory analysis, the electric couple corrosion rate of B10/B30 is found to be mainly controlled by the reaction kinetics of B10 anode and B30 cathode. Thus, B30 as the inner tube and B10 as the outer tube were used in marine air coolers with effectively improved service life. This study provides an important theoretical basis for optimizing the material selection of marine seawater pipelines and coolers.</p>

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Corrosive study of B10/B30 copper-nickel alloys coupled pipeline in static seawater

  • 期刊论文

  • 发表日期：

    2025年1月7日

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  • Feng Qian,
  • Xvhui Liu,
  • Rui Cui,
  • Kai Wang,
  • Chao Wang,
  • Xiong Bao,
  • Dongsheng Dong,
  • Mengni Zhou,
  • Zunhua Zhang,
  • Xiaofeng Guo,
  • Jie Wang

摘要

In marine seawater pipelines and coolers, copper-nickel alloys such as B10 and B30 are the main material of choices. Due to the differences in nickel content, the corrosion potentials of these two alloys are significantly different. When the pipelines of these two alloys are connected with cooling equipment, there is a risk of electric couple corrosion. In order to effectively control the electric couple corrosion between B10/B30 and prolong the service life of seawater pipeline systems, this study uses an electrochemical method to test the electric couple potential and electric couple current of B10 and B30 tubular pairs in static seawater. In addition, the electric couple corrosion rate with time is also analyzed in depth. Through a mixed potential theory analysis, the electric couple corrosion rate of B10/B30 is found to be mainly controlled by the reaction kinetics of B10 anode and B30 cathode. Thus, B30 as the inner tube and B10 as the outer tube were used in marine air coolers with effectively improved service life. This study provides an important theoretical basis for optimizing the material selection of marine seawater pipelines and coolers.