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<p>The degradation mechanism in tribocorrosion is governed by corrosion, wear and the interaction between these two aspects. One approach that has been used to describe mechanical wear and corrosion contributions in tribocorrosion is the mechanistic approach when the material loss due to corrosion is distinguished from that loss due to mechanical wear. However, this approach is limited to applying anodic potential, which is unrealistic in the real world. In the current work, the electrochemical noise technique was employed to perform tribocorrosion testing under open circuit potential in a mechanistic approach, yielding more realistic data on tribocorrosion. Three different sliding speeds were examined for two of the most important passive alloys (Ti6Al4V and SS 304) immersed in Ringer’s solution at 37&#xa0;°C. Detailed analysis of the current signal during rubbing was performed using the wavelet transform, WT, to study the mechanism of tribocorrosion. The current flow due to scratching the surface was always higher for the SS 304 alloy compared to the Ti6Al4V alloy, and it increases with sliding speed. However, SS 304 alloy exhibited a lower total volume of material loss due to lower mechanical wear contribution. Under sliding speed conditions, the two tested alloys showed a trend of partial repassivation.</p>

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Using Electrochemical Noise EN To Study the Tribocorrosion Mechanisms for Ti6Al4V and SS 304 in Ringer’s Solution

  • 期刊论文

  • 发表日期：

    2025年12月7日

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  • Righdan Mohsen Namus,
  • Ammar Dawood Ghali Al-Rubaye,
  • Muhaed Sadiq Alali

摘要

The degradation mechanism in tribocorrosion is governed by corrosion, wear and the interaction between these two aspects. One approach that has been used to describe mechanical wear and corrosion contributions in tribocorrosion is the mechanistic approach when the material loss due to corrosion is distinguished from that loss due to mechanical wear. However, this approach is limited to applying anodic potential, which is unrealistic in the real world. In the current work, the electrochemical noise technique was employed to perform tribocorrosion testing under open circuit potential in a mechanistic approach, yielding more realistic data on tribocorrosion. Three different sliding speeds were examined for two of the most important passive alloys (Ti6Al4V and SS 304) immersed in Ringer’s solution at 37 °C. Detailed analysis of the current signal during rubbing was performed using the wavelet transform, WT, to study the mechanism of tribocorrosion. The current flow due to scratching the surface was always higher for the SS 304 alloy compared to the Ti6Al4V alloy, and it increases with sliding speed. However, SS 304 alloy exhibited a lower total volume of material loss due to lower mechanical wear contribution. Under sliding speed conditions, the two tested alloys showed a trend of partial repassivation.