Currently, there is information about the harmful effects on aluminum parts in contact with biofuels.
First of all, the term E5 or E10 means that the value of biocomponents is not 5 or 10% and cannot exceed these values. This means that E10 fuel may have 6 or 8%.
The commonly used E5 fuels also contain biocomponents. We have used such fuels in injection systems with aluminum parts for many years and no traces of corrosion of aluminum elements have been found. Due to the properties of aluminum, it is covered with an effective passivation layer. Neither temperature nor pressure damaged the passivation layer.
Currently, E10 fuels with component contents of up to 10% are used. We have been using E10 fuel in our pumps for a year for testing purposes and, as in the first case, we did not find any traces of corrosion.
Perhaps the use of E50 fuels would have some impact, but for E10 fuels, after one year of operation, no traces of corrosion or degradation of the aluminum surface were found.
This is the inside of the test pump after using E10 fuel for a year
