Corrosivity of anhydrous ethanol, hydrated ethanol(1) and fuel E25(2) (25% ethanol/75% gasoline)


The objective of the work was to study the corrosion of API 5LX 46 and API 5LX 65 alloys, used for pipelines when in contact with anhydrous ethanol, hydrated ethanol and Brazilian gasoline blend (E25) through laboratory immersion tests, NACE TM-0172 tests and dynamic tests (corrosion loops). Based on the results of this study, it was concluded that it is advisable that the internal surface of the pipelines be painted in order to avoid the corrosion of the internal walls when stagnant moments can’t be avoid or when the system isn’t used only for hydrated and anhydrous ethanol. The objective of the painting is only to avoid the ethanol contamination, which could change its corrosiveness and/or its color, which is unacceptable in the market.

PANOSSIAN, Z.; MOREIRA, A.R; SANTOS, C.A.L.; BRAGAGNOLO, G.N; GANDUR. M; MONTEIRO.E Estudo da verificação da corrosividade do etanol anidro, do etanol hidratado e da gasolina brasileira ( 25% etanol/ 75% gasolina) em relação ás ligas API 5LX 46 e API 5LX 65. In: NACE INTERNATIONAL CONFERENCE, 2010, Texas. Proceedigns… / e / CONGRESSO BRASILEIRO DE CORROSÃO, INTERCORR, 30., 2010, Fortaleza. Anais… Fortaleza: ABRACO, 2010. 15 p.

This paper was presented at the INTERCORR Congress 2010. To get full article please contact ABRACO – Brazilian Association of Corrosion by email:

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