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espanolResumen En esta investigacion se estudian los efectos corrosivos del Biodiesel en la fundicion de hierro gris a temperatura ambiente. Los ensayos de inmersion estatica se realizaron mediante tecnicas gravimetricas con ausencia de luz y con cinco diferentes materias primas: sebo vacuno, manteca de cerdo, aceite de girasol, aceite de soya y aceite de coco. La afectacion de los acidos grasos que componen los diferentes Biodiesel fue determinada por medio de la regresion lineal con los datos obtenidos de velocidad de corrosion. Los resultados muestran que el Biodiesel con mayor nivel de insaturacion en su composicion es el que afecta la perdida de masa en el material de manera mas significativa, llevando a procesos mas corrosivos sobre la fundicion gris. portuguesResumo Esta pesquisa estuda os efeitos corrosivos do Biodiesel no ferro fundido cinzento a temperatura ambiente. Os ensaios de imersao estatica foram realizados mediante tecnicas gravimetricas com ausencia de luz e com cinco materias primas diferentes: sebo bovino, gordura suina, oleo de girassol, oleo de soja e oleo de coco. O efeito dos acidos graxos que compoem os diferentes Biodiesel foi determinado atraves da regressao linear com os dados avaliados da taxa de corrosao. Os resultados demonstram que os Biodiesel com maior concentracao de esteres insaturados afetam de forma mais significativa a perda de massa no material, causando processos mais corrosivos sobre o ferro fundido cinzento. EnglishAbstract The corrosive effects of biodiesel on gray cast iron at room temperature were studied. Static immersion tests were carried out through gravimetric techniques and in the absence of light, using five raw materials: beef tallow, lard, sunflower oil, soybean oil, and coconut oil. The influence of fatty acids that make up biodiesel was determined through linear regression with data obtained from the corrosion rate. Results show that biodiesels with a higher degree of unsaturated fats in their composition have a more significant effect on the loss of mass in the material, leading to more corrosive processes in gray cast iron.

Corrosiveness of biodiesel obtained from different raw materials on gray cast iron