An oil’s viscosity index (VI) is a measure of how its viscosity changes with temperature. It is calculated using the following formula: VI = (Ln(μ100) – Ln(μ40))/(Ln(μ100) – Ln(μ0)) x 100 Where: In this formula, the natural logarithm of viscosity is used to calculate the ratio of the change in viscosity at 40°C and 100°C…

3 factors that affect viscosity: exploring the secrets of fluid behavior The concept of viscosity may not be common in our daily lives, but it has a crucial impact in many fields. From the flow of lubricants to the application of paint, from food processing to biomedical research, viscosity is everywhere. So, what determines the…

Calcium sulfonate grease and lithium complex grease are two common greases, and there are some distinct differences between them. First, the chemical composition is different. Calcium sulfonate grease is composed of calcium ions and sulfonate ions, while lithium complex grease is composed of lithium ions and fatty acid ions. The difference in the chemical composition…

Selecting chemical additives in a lubricant category is an important subject. In order to meet the needs of mechanical operation, some chemical additives are usually added to lubricating oil to improve its performance and extend its service life. This article will provide a detailed introduction to chemical additives in the lubricating oil category, including their…

Viscosity index is a measure of how an oil’s viscosity changes with temperature. A higher viscosity index indicates that the oil’s viscosity changes less with temperature, meaning it maintains a more consistent thickness throughout the temperature range. Therefore, a viscosity index of 5W-30 indicates that the oil maintains its consistency relatively well at both low…

Oil solidification refers to the phenomenon that oil changes from liquid to solid when the temperature is lower than the oil’s freezing point. During this process, the molecular structure of the oil will change, leading to problems such as clogging of the oil circuit. Therefore, preventing oil from solidifying is crucial to ensure the normal…

In the field of materials science, PIB polymer is a polymer material with multiple advantages. It is copolymerized from the monomers butyl acrylate (BA) and styrene (St), and has the characteristics of tear resistance, high temperature resistance, and easy processing. This article will introduce in detail the main uses of PIB polymers and application cases…

Oil foaming is a common problem in the petroleum industry. During the production and processing of oil, bubbles often occur due to the mixing and stirring of different ingredients. Bubbles will not only affect the quality of the oil, but also cause damage to production equipment and pipelines. Therefore, it becomes crucial to find an…