A preliminary study was made of the corrosiveness of 15% by volume methyl fuel/gasoline blends on materials conventionally used for gasoline service in automotive fuel systems. The presence of water, salt and air dramatically increased the corrosiveness of the fuel. Of the metals studied, aluminum was relatively unaffected, while copper, brass, steel (types 1181 and 1008), zinc and template all showed signs of corrosion. Non-metallic samples, particularly expanded polyurethane and Buna-N. underwent greater attack in the presence of methyl fuel. Conductivity measurements showed that the presence of water and salt in the fuel can cause galvanic corrosion to occur.
On a fait une etude preliminaire de l'effet corrosif que produit un melange a 15% en volume, forme d'un combustible methyle et d'essence, sur les materiaux ordinairenient employes en prasence dans les vehicules moteurs. La presence d'eau, de sel et d'air a augmente considerablement l'effet corrosif du combustible. Parmi les metaux etudies, l'aluminium n'a pas ete relativement affecte, tandis que le cuivre, le laiton, l'acier (types 1181 et 1108), le zinc et la tole plombee ont manifeste des signes de corrosion, Les produits non metalliques, particulierement le polyurethane expanse et le caoutchouc synthetique, Buna-N, ont ete affectes davantage en presence du combustible methylique. Les mesures de conductivite out demontre que la presence d'eau t de sel dans le combustible peut produire de la corrosion galvanique.
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