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This study investigates the corrosive effects of water emulsion biodiesel-diesel fuel (W5B20) on copper performed adhering to ASTM G31 for 1200 h at 25 °C. W5B20 was formed by combining 5 vol% of distilled water, 3 vol% of surfactants (combination of Span 80 and Tween 80), and 92 vol% of a mixture of 20 vol% biodiesel in diesel (B20). The blending method was performed using an XiangYi Homogenizer operated at 80 watts for a period of 9 min. The analysis comprised of total acid number (TAN), mean droplet diameter and corrosion rate. Copper exposed to W5B20 had corrosion rate of 0.002854 mm/yr., whereas exposure to diesel had corrosion rate of 0.0003278 mm/yr. TAN value for W5B20 rose by 30%, whereas for diesel it rose by 36%. Observed 8.7 times higher corrosion immersed in W5B20 than diesel appears to be influenced by the 8.2 times higher initial TAN value of W5B20. To benefit from possible reduction in exhaust emissions using water emulsified biodiesel-diesel fuel rather than diesel, further research is necessary to examine the compatibility between emulsified fuel and fuel delivery metals, especially to identify the acceptable level of metal corrosion rate before considering the utilization of water emulsion biodiesel-diesel fuel.

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Effect of Water-in-High Concentration Biodiesel-Diesel Emulsion Fuel Towards Copper Corrosion

  • 会议论文

  • 发表日期：

    2026年

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  • Davannendran Chandran,
  • Revathi Raviadaran,
  • Taib Iskandar Mohamad,
  • Damilare Samuel Oyebamiji

摘要

This study investigates the corrosive effects of water emulsion biodiesel-diesel fuel (W5B20) on copper performed adhering to ASTM G31 for 1200 h at 25 °C. W5B20 was formed by combining 5 vol% of distilled water, 3 vol% of surfactants (combination of Span 80 and Tween 80), and 92 vol% of a mixture of 20 vol% biodiesel in diesel (B20). The blending method was performed using an XiangYi Homogenizer operated at 80 watts for a period of 9 min. The analysis comprised of total acid number (TAN), mean droplet diameter and corrosion rate. Copper exposed to W5B20 had corrosion rate of 0.002854 mm/yr., whereas exposure to diesel had corrosion rate of 0.0003278 mm/yr. TAN value for W5B20 rose by 30%, whereas for diesel it rose by 36%. Observed 8.7 times higher corrosion immersed in W5B20 than diesel appears to be influenced by the 8.2 times higher initial TAN value of W5B20. To benefit from possible reduction in exhaust emissions using water emulsified biodiesel-diesel fuel rather than diesel, further research is necessary to examine the compatibility between emulsified fuel and fuel delivery metals, especially to identify the acceptable level of metal corrosion rate before considering the utilization of water emulsion biodiesel-diesel fuel.