Industrial study of dacromet coating effect on cavitation behavior in impeller of water pump in EF۷ engine

Water pump performance as a part of cooling system has a significant effect on the engine efficiency. Due to the complex nature of the cavitation and the high cost and unavailability of expensive testing equipment, most researchers conduct numerical studies, but this paper presents an industrial experimental process to investigate the corrosion behavior of water pump impeller in EF۷ engines in high cavitation condition. Impeller material in coolant water pump is a sensitive parameter. In Basa Pars Sanat factory, polyphenylene sulfide impeller was used in water pump which had thermal and erosion resistance, but it supplies a low flow rate which is not a proper option to continue the production. So, the most productive impeller with a sheet metal structure was investigated to achieve the highest flow rate and the lowest manufacturing cost. Therefore, choosing a steel alloy with high sheet tension and then electroplating on it is a more reasonable and economical option. In this research, the aim is to investigate the corrosion resistance of water pump impeller with dacromet coating, by cavitation and durability tests.

کلیدواژه ها:

Dacromet ، Water pump Impeller ، Cavitation ، Corrosion