Additives for modification of deposits and inhibition of corrosion Historically, low speed Diesel engines have used fuel additives based on silicone compounds. Silicone compounds combine with vanadium and sodium contaminants to form soft, friable deposits at the operating temperatures of the low speed engine. SFA offers products compatible with low speed engine operation. Medium speed engines represent a different problem. Higher temperatures result in operating problems more like those found in combustion turbines operating under derated conditions.
Severe deposit build up occurs on the piston crown and exhaust valve leading to corrosion.
In extreme cases, corrosion leads to metal failure of the piston crown with exhaust gasses and flame entering the crankcase. Failure of the exhaust valve leads to loss of compression and failure of the cylinder to produce power. In this case, oil soluble magnesium products manufactured by SFA International will control deposits and corrosion. The actual treating ratio depends on a number of factors including power, derating factor and speed of the engine. An on-site survey of the engine is generally required to develop the best treating condition.