AS/NZS 1580.481.1.6:1998

1 - AS/NZS 1580.481.1.6:1998 PAINTS AND RELATED MATERIALS-METHODS OF TEST - COATINGS-EXPOSED TO WEATHERING-DEGREE OF EROSION
1 - PREFACE
1 - METHOD
1 - 1 SCOPE
1 - 2 REFERENCED DOCUMENTS
2 - 3 DEFINITIONS
2 - 4 PRINCIPLE
2 - 5 APPARATUS
2 - 5.1 Clean water
2 - 5.2 Cotton wool
2 - 5.3 Dry film thickness apparatus
2 - 6 VIEWING ENVIRONMENT
2 - 7 PROCEDURE
2 - 7.1 General
2 - 7.2 Method A - Determination of percentage erosion
3 - 7.3 Method B - Visual assessment
3 - 8 REPORT

This Standard describes two methods for assessing the degree of erosion of a test film that has been exposed to weathering. Method A - determination of the decrease in film thickness on a metal test panel as a percentage of the original dry film thickness; or Method B - a visual examination to check for evidence of exposure, or ‘grinning through’, of an underlying substrate of contrasting colour.

This Standard describes two methods for assessing the degree of erosion of a test film that has been exposed to weathering. These are as follows:(a) Method A -determination of the decrease in film thickness on a metal test panel as a percentage of the original dry film thickness; or(b) Method B -a visual examination to check for evidence of exposure, or 'grinning through', of an underlying substrate of contrasting colour.NOTES:1 Method A is not applicable to non-metallic substrates that prevent a determination of the film thickness using non-destructive techniques.2 Method B is usually sufficient for evaluating conventional decorative paint films, of less than 100 µm thickness, whereas Method A is suitable for heavy duty finishes of greater than 100 µm thickness.

Originated in Australia as part of AS K41.481.1-1962.
Previous edition AS 1580.481.1.6-1991.
Jointly revised and redesignated as AS/NZS 1580.481.6-1998.