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石油産品酸值測定儀的測量意義

发表时间：2019-12-17 17:26作者：得利特

測定石油産品酸值的方法，归纳起来有两类:一类是酸碱中和法，是依据 GB/T264和GB/T7599方法规定的；另一类是电位滴定法，是依据GB/T 18609-2001标准设计.那么測定石油産品酸值有哪些意义呢?下面我们一起来了解一下。

①根据酸值含量大小，可判断石油産品中酸性物质的含量。一般说来，石油産品酸值越高，其中所含酸性物质越多。反之，酸值越小，酸性物质含量少。

②酸值可大概地判斷石油産品对金属的腐蚀性能。石油産品中的有机酸含量少，在无水分和温度低时，对金属不会有腐蚀作用.但其含量多及有水存在时，就能腐蚀金属。有机酸分子越小，腐蚀性越强。

③判断石油産品的使用性能。柴油的酸值对柴油机的工作状况有较大影响，酸值大的柴油会使发动机积炭增加，造成活塞磨损和喷嘴结焦。如果酸度过高，可能是酚类或硫醇含量过高，这不仅会影响石油産品的颜色安定性，而且燃烧后生成的有害气体会腐蚀机件和污染环境。

④根據酸值大小可判斷使用中潤滑油的變質程度。潤滑油在使用一段時間後，由于氧化逐漸變質，表現爲酸值增大，當酸值超過一定限度，就應更換新油。

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文章分類：技術知識

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