›› 2019, Vol. 21 ›› Issue (4): 112-118.

• Lubrication Research • 上一篇    

硼酸、磷酸对改善复合钙基润滑脂硬化现象的机理探讨

郑会1,孙洪伟2,何懿峰2,苏朔2,庄敏阳2,刘欣阳2   

  1. 1. 石油化工科学研究院
    2. 中国石化石油化工科学研究院
  • 收稿日期:2019-04-24 修回日期:2019-05-28 出版日期:2019-12-30 发布日期:2019-12-30
  • 通讯作者: 郑会 E-mail:zhenghui.ripp@sinopec.com

Discussion on the Mechanism of Boric Acid and Phosphoric Acid to Improve the Hardening of Complex Calcium Lubricating Grease

Hui ZhengSun Hongwei2,Yi-Feng HE2,Su Shuo2, 2,Liu Xinyang3   

  • Received:2019-04-24 Revised:2019-05-28 Online:2019-12-30 Published:2019-12-30
  • Contact: Hui Zheng E-mail:zhenghui.ripp@sinopec.com

摘要: 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.

关键词: 润滑脂, 复合钙, 硬化

Abstract: 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.

Key words: lubricating grease, complex calcium, hardening