Root cause analysis of corrosion in a marine diesel engine cylinder during preservation

Many kinds of marine diesel engines may not be used before or during the period of maintenance, boat overhaul, cold season, etc. Because some parts of an engine or its accessories are not corrosion resistant and during the preservation period, when the engine is no smeared with oil or any protective substance, it is required for the diesel engine to pass a process to ensure its good health. This paper presents a root cause analysis of corrosion in a marine diesel engine liner after years of preservation. So at first, methods of engine and component protection are presented in preservation process. Then, by presenting a diesel engine liner corroded during the preservation process, the effect of careless and inappropriate preservation is assessed. Results show that not complete discharge of cooling fluid from the space between liner and cylinder block and also ambient humidity entrance into engine compartment due to tearing of aluminum protective foil are the main reasons of atmospheric corrosion in this marine diesel engine liner.