鲜重的最大增重速率高。
致密细小氧化物膜具有很强的耐蚀性，腐蚀增重速率先是大幅降低，然后逐渐平缓。
The compact and small particle oxide film was very corrosion resistant. The weight gain rate of samples declined very much firstly, and then changed little.
生产上选择增重速率及最大增重速率较快的中熟或中晚熟品种和材料是获得高产的关键。
The key to gain high yield should choose those varieties with mean filling rate and maximum filling rate to be quick from middle or middle late materials.
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