Study On The High Temperature Performance Of Complex Calcium Sulfonate Grease

Complex calcium sulfonate grease is the lubricant industry, "star", since the 1980 s by Canadian scientists after the invention, and soon got a variety of industry recognition in the late 1990 s commercialization, until today, it technology is still being kept secret, is mainly used in the production of manufacturing equipment under more water, heavy-duty, high-temperature working conditions and other harsh environments in. Another advantage of the composite calcium sulfonate grease is green, does not pollute the environment, do not contain heavy metals and other toxic substances, in line with the national environmental protection requirements.We find that, although the use of high temperature evaluation methods commonly used in the industry- dropping point(GB / T 3498) to test their level is good, but with some other high-temperature evaluation methods, such as: the amount of high-temperature automotive wheel bearing leakage, heat penetration, thorough testing and other methods of bearing life, and with the traditional high-temperature grease- lithium complex and polyurea grease contrast, found flaws in their performance(> 100 ?) temperature conditions; by studying calcium sulfonate complex grease formulation and process, to obtain a method: the first uses a dicarboxylic acid a, and twelve-hydroxystearic acid at a mass ratio of 5: 9 complex, two acids with lithium hydroxide to form a composite thickening agent, thickener accounting system when the composite total mass of 6.5%, 0.5Mpa pressure autoclave at a pressure of preparation, sample temperature to achieve optimal performance, enhance its temperature reaches the level of the test objectives; and also by comparing the autoclave pressure autoclave process discovered: better than the atmospheric pressure autoclave reactor, the former shorter working hours, more economical, the product performance is excellent, Qieyi better than the international mainstream. The most important thing is to grease lubrication, often used to characterize the lubricating oil film thickness in the industry- that the film-forming ability, the last chapter, the ability to conduct research on a film by film thickness meter, and concluded: foreign sample in contrast, under the same conditions, the paper samples with the ideal film thickness, wheel bearings for the automotive industry, iron and steel high-temperature equipment and other conditions provide lubrication protection.At present, high temperature grease generally choose lithium complex grease and polyurea-based grease. Results of this study, one of the key factors determining the complex calcium sulfonate grease high-temperature performance: Pressure complex thickener and preparation process to find an improved method, which is some special equipment grease provides new options to expand its field of application.