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Homepage>BS Standards>21 MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE>21.100 Bearings>21.100.10 Plain bearings>21/30419771 DC BS ISO 4821. Plain bearings. Dynamic adhesion test method for DLC coated parts under lubricated condition
immediate downloadReleased: 2021-05-11
21/30419771 DC BS ISO 4821. Plain bearings. Dynamic adhesion test method for DLC coated parts under lubricated condition

21/30419771 DC

BS ISO 4821. Plain bearings. Dynamic adhesion test method for DLC coated parts under lubricated condition

CURRENCY
LANGUAGE
English
Standard number:21/30419771 DC
Pages:21
Released:2021-05-11
Status:Draft for Comment
DESCRIPTION

21/30419771 DC


This standard 21/30419771 DC BS ISO 4821. Plain bearings. Dynamic adhesion test method for DLC coated parts under lubricated condition is classified in these ICS categories:
  • 21.100.10 Plain bearings

This document specifies a procedure to measure the adhesion strength of diamond like carbon (DLC) coatings specified in ISO 20523 by detecting acoustic emission signals using ball-on-disk method under the lubricated condition. DLC is normally coated on metal or ceramic.

The test results are not applicable when the DLC coated parts operate in an unlubricated environment.

The positioning of this test method in the process of parts evaluation performed by automobile manufacturers is shown in Annex A, and the correlation between results obtained by the test method specified in this document and results obtained by the test method using conventional engine parts is described in Annex B.


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