Water emulsifying occurs when the additive polar head clings to a micro-droplet of moisture. The result may be an increase in corrosion-related problems. If a high concentration of an anti-wear agent is added to the oil, the corrosion inhibitor may become less effective. Some additives compete with each other for the same space on a metal surface. When the specified concentrations of additives become unbalanced, overall oil quality can also be affected. In addition, increasing the percentage of a certain additive may improve one property of an oil while at the same time degrade another. In other cases, the performance of the additive doesn’t improve, but the duration of service does improve. As more additive is blended into the oil, sometimes there isn’t any more benefit gained, and at times the performance actually deteriorates. When using oil additives, more is not always better. It offers a good reason to repair and eliminate any issues as soon as they are detected through an appropriate oil analysis test slate. You generally will see this in an engine. They are used to peptize (disperse) soot particles for the purpose of preventing agglomeration, settling and deposits, especially at low to moderate temperatures. These additives are metal deactivators, detergents and dispersants. Particle enveloping means that the additive will cling to the particle surface and envelop it. There are a few polar mechanisms such as particle enveloping, water emulsifying and metal wetting that are worthy of discussion. If you are allowing into your system contaminants that additives are attracted to, such as dirt, silica and water, the additives will cling to the contaminants and settle to the bottom or will be filtered out and deplete your additive package. Think about the environment you work in, the products you produce and the types of contaminants It’s important to note that additives are also sacrificial. Things that are not polar include wax, Teflon, mineral base stock, a duck’s back and water repellents. In simple terms, it is anything that water dissolves or dissolves into water.Ī sponge, a metal surface, dirt, water and wood pulp are all polar. Impart new properties to base oils with extreme pressure (EP) additives, detergents, metal deactivators and tackiness agents.Īdditive polarity is defined as the natural directional attraction of additive molecules to other polar materials in contact with oil. Suppress undesirable base oil properties with pour-point depressants and viscosity index (VI) improvers. They typically range between 0.1 to 30 percent of the oil volume, depending on the machine.Įnhance existing base oil properties with antioxidants, corrosion inhibitors, anti-foam agents and demulsifying agents. Lubricant additives are organic or inorganic compounds dissolved or suspended as solids in oil. It’s crucial to understand the role of additives and their function(s) within the lubricant. However, there is more to lubricants than just viscosity. After all, viscosity is the most important property of a base oil.īaselines for incoming oils are set and the health of the lubricant is monitored based on viscosity alone. Lubrication professionals often become very familiar with the base oil viscosity of their lubricants.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |