Article | REF: B5340 V1

Lubricants - Properties and features

Author: Jean AYEL

Publication date: August 10, 1996

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


Overview

Français

Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.

Read the article

AUTHOR

  • Jean AYEL: Engineer from the École nationale supérieure des arts et industries de Strasbourg and the École nationale supérieure du pétrole et des moteurs - Doctor-Engineer - Head of the Petroleum and Energy Applications program at the École nationale supérieure du pétrole et des moteurs

 INTRODUCTION

A lubricant is qualified for a specific application by the properties required for that use. These properties are set out in a specification, standard or norm. Some of them are summarized in technical data sheets intended for users. The composition of the products is never given. In some cases, the presence in the formula of valuable or original constituents (synthetic bases, very high VI hydrotreated bases, new additives, etc.) is mentioned, enabling the product to be better promoted, but the indication always remains rather vague as to the exact nature of the components and in no case provides information on their concentrations.

Properties fall into two groups: identification and use characteristics, and performance characteristics.

Identification (density, refractive index, pour point, etc.) and use characteristics are physical and/or chemical properties, usually referred to as "physico-chemical properties", assessed by simple laboratory tests. Some of these characteristics are actually functional properties (usage characteristics), such as compressibility or dynamic viscosity.

Physico-chemical, mechanical or complex performance characteristics are assessed by tests carried out in the laboratory, in cells on test benches or in actual service.

This article describes only the most commonly used properties and characteristics of both liquid lubricants and greases. A complete list of all test and analysis methods is given in the documentation at the end of the study, together with the equivalences between the various national and international standardization bodies.

You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

This article is included in

Friction, wear and lubrication

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
Lubricants
Outline