ISO 12921:2024 石油製品および潤滑油 | ページ 2

Foreword

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This document was prepared by Technical Committee 28, Petroleum and related products, fuels and lubricants from natural or synthetic sources.

Introduction

Numerous standards exist to evaluate the influence of water on grease properties. These standards are described in Annex A.

The purpose of this document is to describe a method for the evaluation of the effect of water on the working stability of a grease, by comparing the penetrations of the grease worked without water and the grease worked in presence of water. This allows to predict the mechanical behaviour of the grease, the risk of leakages due to excessive softening, the risk of lubricating properties losses by excessive hardening or complete solubilization.

1 Scope

This document specifies a method for evaluating the change of consistency of a grease when it is submitted to working and prolonged working in presence of 10 % of water.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

No terms and definitions are listed in this document.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

Bibliography