Zahn黏度杯测定液体黏度规范的比较

黏度是液体的重要理化性能指标。工程上常用Zahn黏度杯快速检查不同液体的黏度。不同的制造商生产出来的Zahn黏度杯有一定的差异,企业在使用Zahn黏度杯时有其具体引用的规范或标准。目前,国际通用的Zahn黏度杯的规范标准为ASTM D4212,而波音等国外飞机制造商的Zahn黏度杯规范中关于液体黏度和流出时间特性转换公式与通用标准存在差异。基于同一种标准黏度液体,系统地比较了两种规范中特性转换公式的差异,并分析产生差异的原因,同时给出了这些差异可能造成的影响。

Comparison of Zahn Viscosity Cups Specifications for Determination of Liquid Viscosity

Viscosity of the fluid is an important physical and chemical property index of the liquid. Zahn viscosity cups are used to check the viscosity of different liquids quickly in engineering. Each manufacturer produces a different cup. And a specific specification or standard has been noted in every enterprise when using these cups. ASTM D4212 is currently regarded as general international standards. The equation of converting the time of flow in seconds to kinematic viscosity in Zahn viscosity cup specification from Boeing or other foreign aircraft manufacturers is different from the general international standards (ASTM D4212). Based on the same standard viscosity liquid, the differences between the two specifications were systematically compared, and the reasons for these differences were analyzed, the possible effects of these differences were also given.