硼酸钾做润滑油添加剂的抗磨性能之研究

作者利用Shell-Seta四球试验机研究了白油中所含硼酸钾的抗磨特性,以及分散刘中性烷基苯磺酸钙对硼酸钾抗磨性能的影响,并且利用X-射线光电子能谱仪(XPS)和俄歇电子能谱仪(AES)考察了摩擦表面的元素组成及硼元素的价态。结果表明,含硼酸钾的白油能够在摩擦表面形成含硼酸钾的表面膜而具有较好的抗磨性,硼在摩擦表面膜中以硼酸钾的形式存在,分散剂烷基苯磺酸钙会影响硼酸钾沉积腆的形成及其与金属表面的结合强度而降低抗磨性能。

Study of the Antiwear Properties of Potassium Borate as an Oil Additive

The antiwear properties of potassium borate as an oil additive, the effect of dispersant calcium sulfonate on the antiwear property of potassium borate was evaluated using a Four-ball Machine. Auger Electron Spectroscopy (AES) and X-ray Photoelectron Spectroscopy (XPS) were used to examine the composition and the valence state of boron on the worn surfaces. It was shown that potassium borate posseses a good antiwear function since the formation of a deposited potassium borate film. The wear rate increased as the potassium borate concentration increased, which was related to the weak film strength for surface film containing more potassium borate. No B2O3 and FeB were detected by XPS, the boron on the friction surfaces was in the form of K2B4O7, which is soluble in water. The dispersant calcium sulfonate has great effect on the antiwear properties of potassium borate, which increased the wear rate significantly even though it's concentration is 0.1%(wt).AES analysis revealed that strong sulfur (S) and boron (B) peaks appeared, so a weak deposited film strength to steel surface mechanism was proposed.