What is the shear stability of the oil?

What is the shear stability of the oil?

Measure the oil quality index and parameters of many, today we are going to speak/shear stability, it is representative of the oil which aspects of nature? Day state carefully explain for you.

What is the cut? Before about [shear stability], we'll be the first to introduce the concept/shear and shear is a term of architecture. Within easy reach of specific refers to: in a pair of the same size, pointing to the opposite lateral forces (i.e., perpendicular to the role of the force), the material of the cross section along the direction of the external force of relative faulting and deformation phenomenon.

At first glance some abstract, but please highlight: deformation shear force reaction of oil in the oil, is refers to the oil molecules under high temperature and high pressure, due to the stress and the shear stress of oil molecules are broken and the deformation, affecting the viscosity of the oil itself.

Shear stability, in front of the understanding of two concepts, let's officially to shear stability a definition: shear stability is the representative of a lubricating oil under mechanical shear, the nature of the RCC can keep stable viscosity.

Good shear stability, lubricating oil can keep stable in the mechanical shear viscosity, use cycle, engine oil lubrication effect is more stable. Shear stability, lubricating oil viscosity decrease due to shear. Intuitively, is the oil is thinning.

Conclusion: shear stability is good or bad, will affect the use effect of oil under high temperature and high pressure, as well as the effective service life of the engine oil.

How to improve the shear stability in order to improve the shear stability of oil, the scientists will be added in the oil viscosity index improver, this is a kind of temperature sensitive polymer.

At higher temperatures, its molecular chain stretching, friction increase of the base oil, the oil liquid blocking effect, namely viscosity increase, lubricant viscosity decreased to some extent.

In general, due to the constant iterative oil formula, free to allocate the total synthesis of oil have more advantages in shear stability.