Ground vehicles are operated in severe environments at the risk of corrosion. The corrosion would degrade military readiness and cause a large amount of cost. This paper describes some engineering practices of corrosion prevention for ground vehicles based on results of the environmental test and field operation from previous products and similar ones. The influence of environmental factors on the corrosion of ground vehicles is analyzed. And then some corrosion control methods proven by engineering practices are introduced. These practices could enhance the operational readiness and reduce unquantifiable lifecycle maintenance costs of ground vehicles.

A statistical procedure of the lifetime prediction for a certain missile is established by the reliability analysis using the field data. First, the reliability at given time point is estimated by the Kaplan-Meier method according to samples undergoing long time storage. Second, the lifetime distribution mode is obtained by fitting the relationship of the reliability and time with linear regression method. Third, parameters of the lifetime distribution are calculated by the Newton-Raphson method. Finally, the lifetime of a certain missile is predicted with the right censored field data. Results show that the field-reliability method could provide a clear reference model to estimate the lifetime of a certain missile through the field data and give some useful feedbacks for future design improvements.

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