Water is very commonly found in diesel tank systems. The sulfur in diesel served as a critical biocide, which minimized microbial growth. So almost immediately, the tanks containing diesel fuel with virtually no sulfur started showing signs of aggressive microbial growth and corrosion. Diesel tanks and fueling systems developed corrosion that was growing so quickly, what would typically take many years to emerge
was surfacing in a matter of months.
Read more: http://fuelmarketernews.com/vendor-view-addressing-corrosion-and-microbial-growth-in-todays-fuel-environment/