Setembro 2023 vol. 10 num. 1 - XXX Simpósio Internacional de Engenharia Automotiva

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Otimização de design para reduzir a corrosão na bomba elétrica de combustível flex fuel

Design optimization to reduce corrosion in electric flex fuel pump

PERES, Vinícius Araújo ; MELO, Lazaro Benedito de Oliveira ; FERNANDES, Luiz Eduardo de Azevedo ;

Trabalho completo:

By the 2nd law of thermodynamics for metal oxidation, it is known that corrosion cannot be avoided, but mitigating it is essential for the safety and protection of people and of the environment. In the automotive industry, one of the components most susceptible to corrosion is the fuel pump due to its electrical operation and direct exposure to fuels. This situation can lead to electrochemical corrosion and, consequently, it can contaminate the vehicle fuel supply system. With the growing incentive to use ethanol and hence the flex fuel pumps, this scenario should be focus of attention due to the properties of ethanol. This work focuses on investigating the root cause of a characteristic corrosion appearing on the fuel pump housing in durability tests. Based on the theory of electrochemical corrosion, the influence of an exposed and unused grounding terminal of the fuel pump electrical connector is proved and its removal is proposed to mitigate the corrosion. After conducting a durability test with aggressive ethanol and at high temperature on samples with and without the grounding terminal, it is found that the proposed design significantly improves the housing protection against corrosion and corroborates with the electrolysis theory.

Trabalho completo:

By the 2nd law of thermodynamics for metal oxidation, it is known that corrosion cannot be avoided, but mitigating it is essential for the safety and protection of people and of the environment. In the automotive industry, one of the components most susceptible to corrosion is the fuel pump due to its electrical operation and direct exposure to fuels. This situation can lead to electrochemical corrosion and, consequently, it can contaminate the vehicle fuel supply system. With the growing incentive to use ethanol and hence the flex fuel pumps, this scenario should be focus of attention due to the properties of ethanol. This work focuses on investigating the root cause of a characteristic corrosion appearing on the fuel pump housing in durability tests. Based on the theory of electrochemical corrosion, the influence of an exposed and unused grounding terminal of the fuel pump electrical connector is proved and its removal is proposed to mitigate the corrosion. After conducting a durability test with aggressive ethanol and at high temperature on samples with and without the grounding terminal, it is found that the proposed design significantly improves the housing protection against corrosion and corroborates with the electrolysis theory.

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DOI: 10.5151/simea2023-PAP55

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Como citar:

PERES, Vinícius Araújo; MELO, Lazaro Benedito de Oliveira; FERNANDES, Luiz Eduardo de Azevedo; "Otimização de design para reduzir a corrosão na bomba elétrica de combustível flex fuel", p. 335-341 . In: Anais do XXX Simpósio Internacional de Engenharia Automotiva . São Paulo: Blucher, 2023.
ISSN 2357-7592, DOI 10.5151/simea2023-PAP55

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