The formation of zinc dithiophosphate antiwear films

Author:

Fujita H1,Spikes H. A.2

Affiliation:

1. Idemitsu Kosan Company Limited Chiyoda-Ku, Tokyo, Japan

2. Imperial College London Mechanical Engineering Department Exhibition Road, London

Abstract

In situ spacer layer interferometry has been used to monitor and compare the formation of both tribo- and thermal zinc dialkyldithiophosphate (ZDDP) films on steel surfaces. For the ZDDP solution studied, negligible thermal film formation takes place below a temperature of 110°C, but a ZDDP tribofilm is generated on rubbed surfaces even at room temperature. The ZDDP tribofilm formation is critically dependent on the extent of direct solid solid contact during rubbing and does not take place if the elastohydrodynamic film thickness is significantly greater than the surface roughness. Tests at different slide-roll ratios indicate that the rate of ZDDP tribofilm formation is proportional to the product of sliding distance and rubbing time. Based on the results, it is not possible to explain ZDDP tribofilm formation in terms of a response to contact pressure or flash temperature. It is likely that the tribofilm reaction is either strongly catalysed by species released during rubbing, such as soluble FeII or FeIII, or is triggered by triboelectronic processes such as exoelectron emission.

Publisher

SAGE Publications

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering

Cited by 151 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3