In order to reduce the mass loss of dodecyl phenyl succinic acid rust inhibitor(T746) commonly used in turbine oils due to waterwashing，according to the action principle of rust inhibitor,through increasing the length of carbon chain，two kinds of long chain alkenyl succinic acid and half ester were synthesized.The waterwashing properties and corrosion inhibiting performance in the turbine oils,and the effect on the deemulsibility of oil were evaluated according to the method specified in the US military standard MIL17331J.The results show that the new rust inhibitors present excellence corrosion inhibiting and better waterresistance properties compared with T746.These two kinds of additives have good compatibility with commonly used deemulsifier T1001,which can be used as new waterresistance rust inhibitor of turbine oils.