抗氧剂对复合磺酸钙基润滑脂表面硬化及摩擦学性能的影响

研究了抗氧剂L57（辛基／戊基二苯胺）和L135（高相对分子质量液体酚）对复合磺酸钙基润滑脂表面硬化的影响,采用MFT-R4000高速往复摩擦磨损实验仪,考察了添加剂对复合磺酸钙基润滑脂放置40天后的摩擦学性能的影响,并借助扫描电子显微镜和能谱分析仪对磨斑表面形貌进行表征。结果表明,加入抗氧剂L57和L135能够减缓复合磺酸钙基润滑脂锥入度的变化速率,改善表面硬化情况,并可提高复合磺酸钙基润滑脂的减摩抗磨性能,放置40天后润滑脂的摩擦系数曲线依然平稳,且保持良好的摩擦学性能,其中以加入2%L57或2%L135时效果较为明显。     

高碱性复合磺酸钙基润滑脂

高碱性复合磺酸钙基润滑脂综合性能优异,在国外已广泛使用。简要介绍了高碱性复合磺酸钙基润滑脂的发展,基本理论和国外主要专利技术。     

高碱值复合磺酸钙基润滑脂的制备工艺优化

采用单因素试验法,通过考察润滑油基础油(简称基础油)种类、加料顺序、转化阶段反应温度与反应时间对制得润滑脂性能的影响,优化高碱值复合磺酸钙基润滑脂的制备工艺。结果表明：在以基础油A为润滑脂基础油、加料顺序为在转化阶段同时加入高碱值磺酸钙和脂肪酸D、转化反应温度为85℃、反应时间为2.5 h的条件下制得的高碱值复合磺酸钙基润滑脂的性能最好,其滴点超过343℃,高于GB/T 3498—2008标准中的滴点高限,工作锥入度(0.1 mm)为279,钢网分油率为2.17%,极压抗磨性能优秀,多项性能优于市售同类润滑脂。     

复合磺酸钙基润滑脂的制备

通过对相变转化剂和高碱值磺酸钙的选择,制备了一种滴点超过330℃的复合磺酸钙基润滑脂。     

合成磺酸钙及复合磺酸钙基润滑脂中游离氢氧化钙测试方法的探讨

游离氢氧化钙是超高碱值合成磺酸钙（T106D）和复合磺酸钙基润滑脂在生产中残留的氢氧化钙。     

复合磺酸钙基润滑脂的普适性

被称为新一代润滑脂的复合磺酸钙基润滑脂具有优良的高温性能、机械安定性、胶体安定性、氧化安定性、抗水抗腐蚀性,尤其具有优异的极压抗磨能力,因其优异而全面的性能表现,可作为通用润滑脂替代现用的钙基润滑脂、钠基润滑脂、锂基润滑脂、铝基润滑脂等产品,用于各类机械设备的润滑。[编按]     

复合磺酸钙基润滑脂表面硬化因素探讨

重点考察了低分子酸、硼酸、脂肪酸、酸A的用量对复合磺酸钙基润滑脂表面硬化、老化的影响。采用实验室确定的最佳配比，在车间实施了放大生产，并重点考察了产品的储存安定性，结果表明产品质量稳定。     

高性能复合磺酸钙润滑脂

复合磺酸钙基润滑脂是优良的通用润滑脂.介绍了复合磺酸钙基润滑脂的高低温性能,极压抗磨性能,抗水性能,氧化安定性能以及在造纸、钢铁、核电厂、汽车行业的应用.     

复合钛基润滑脂的成脂机理浅析

以苯甲酸、硬脂酸、钛酸酯、水为稠化剂原料,调配不同黏度的基础油,进行复合钛基润滑脂的制脂实验.对复合钛基润滑脂成脂过程的各阶段反应产物进行红外光谱表征,分析出其成脂的一系列化学反应式和最终生成的复合钛皂分子;用试验法研究了基础油黏度对成脂和皂纤维生成效果的影响.从化学反应、固-液作用2个角度对复合钛基润滑脂的成脂机理进...     

润滑脂用高碱值烷基苯磺酸钙的研究

Six kinds of alkylbenzene sulfonic acids were selected to prepare the sulfonates S1—S6. Among them, the sulfonates S3, S4, and S6 could be incorporated into lubricating grease with good performance in comparison with the grease produced from commercial sulfonates T106-1 and T106-2. The optimized conditions for synthesis of the sulfonates S3, S4, and S6 were explored by using different mass ratios of methanol, water and the type of copromoters. It was found out that the appropriate conditions for synthesis of the sulfonate S3 included a methanol to M(M is the total mass of alkylbenzene sulfonic acid and base oil) mass ratio of 16%, a water to M mass ratio of 4%, and a copromoter A to M mass ratio of 2%; the appropriate conditions for synthesis of the sulfonate S4 included a methanol to M mass ratio of 24%, a water to M mass ratio of 2%, a copromoter B to M mass ratio of 2%; and the optimized conditions for synthesis of the sulfonate S6 included a methanol/ M mass ratio of 8%, a water/M mass ratio of 4% and a copromoter B/M mass ratio of 2%. The new sulfonates S3, S4, and S6 produced under the optimized conditions exhibited higher TBN and better antiwear property in camparison with the previous products. Grease samples G9, G10, and G11 were prepared with new sulfonates S3, S4, and S6 successfully and exhibited improved water stability and high temperature performance.     

Overbased Calcium Sulfonate Detergent Technology Overview

Overbased calcium sulfonate is used widely as detergent in automotive and marine lubricants, as well as various industrial oil applications. In this paper, the process to produce overbased calcium sulfonate is overviewed. The sulfonate structure and molecular weight and its molecular weight distribution, the enclosed calcium carbonate nanoparticle size and crystalline structure, properties of the carrier oil, all influence its properties, such as stability, viscosity, and detergency of the system.     

高碱性磺酸盐复合钙基润滑脂的研究进展

高碱性磺酸盐复合钙基润滑脂是一种高温多效润滑脂,自20世纪80年代问世以来,已经在国内外获得迅速发展。这类润滑脂适合用在高温、重负荷、水淋、防锈等场合,已经在冶金、造纸、化工、汽车等领域获得良好应用。文章综述了高碱性磺酸盐复合钙基润滑脂的研究历程、制备方法、性能及应用,将有助于认识和了解这类润滑脂。同时还对高碱性磺酸盐复合钙基润滑脂下一步的研究重点和发展方向进行了分析和展望,希望能促进对该类润滑脂的研究和应用。     

超高碱值磺酸钙替代高碱值磺酸钙的可行性评价

评价了6种超高碱值磺酸钙的热氧化安定性.曲轴箱模拟试验证明,在4030中速船用柴油机油和CD15W -40柴油机油中,部分超高碱值磺酸钙替代高碱值磺酸钙是可行的.     

红外光谱分析在复合磺酸钙润滑脂研制中的应用

高性能复合磺酸钙基润滑脂的制备过程中需要将碳酸钙的晶型转变为方解石晶型,介绍了利用红外光谱来选择转化剂和确定转化条件制备高性能复合磺酸钙基润滑脂的方法。低碳醇是合适的转化剂。     

硼酸、磷酸对改善复合钙基润滑脂硬化现象的机理探讨

In the 1950’s, complex calcium lubricating grease had been widely used. However, due to the hardening problem in the process of storage and use, the production of complex calcium lubricating grease decreases year by year. Domestic and foreign researchers have done a lot of work on its hardening problem, and it has been found that boric acid and phosphoric acid can effectively improve the hardening problem. In this paper, the water absorption test of several calcium salts was carried out, and it was found that calcium 12-hydroxystearate did not absorb water, and calcium acetate, calcium phosphate and calcium borate had different degrees of water absorption. Calcium acetate has the highest water absorption rate, and calcium phosphate and calcium borate have comparable water absorption rates. Using molecular simulation technology, it is found that in the complex calcium grease system, calcium phosphate and calcium borate prefers to combine with water, which inhibits the water absorption of calcium acetate and makes the hardening problem better.