讨论了使用浸渍法测试物体密度中影响测试结果的若干因素, 理论推倒出金属丝直径d与烧杯内径D的比值d/D为密度计算公式中的参数, 试验中应最小化d/D以减少测量偏差; 通过令ρkρs~k(k<1)可使GB/T 1033.1-2008中方法A的测试结果有效, 然而实际操作中局限性大; 常规材料的线膨胀系数很小, 密度测试中, 温度因素可以忽略。

Several factors had been discussed on the process of density determination by immersion method. Theoretically, the ratio d/D was a parameter in the formula of density determination, in which d referring the diameter of wire and D referring the inner diameter of vessel. Minimizing the ratio d/D could decrease the deviation of measurement. ρkρs~k(k<1) should be satisfied to make the immersion method in GB/T 1033.1-2008 available, even though with great limitation. The effect of temperature on determining the density could be eliminated, considering the linear expansion coefficient of conventional materials.