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AS 3894.1-2002


Site testing of protective coatings, Method 1: Non-conductive coatings — Continuity testing — High voltage (brush) method

This Standard provides a practical test method for the on-site determination of the presence of pinholes, holidays, cracks and other discontinuities that penetrate to the substrate, in a non-conductive, protective coating of at least 150 µm thickness on a conductive substrate, using the high voltage or ‘brush’ method.
Published: 07/06/2002
Pages: 18
Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope
2 Application
3 Referenced documents
4 Definitions
5 Principle
6 Materials
6.1 Cleaning solutions/agents
6.2 Marker
7 Apparatus
7.1 High voltage tester
7.1.1 General
7.1.2 Power supply
7.1.3 Detector
7.1.4 Electrical output
7.1.5 Indicators
7.1.6 Electrodes
7.1.7 Ground wire
7.2 Thermometer
7.3 Dewpoint apparatus
7.4 Certified voltmeter
8 Sample and test preparation
8.1 Testing conditions
8.1.1 Field testing
8.1.2 Laboratory testing
8.2 Preliminary inspection of test item
8.3 Preparation of test area
9 Procedure
10 Report
Appendix A
A1 Scope
A2 Operators
A3 Testing location
A4 Environmental hazards
A4.1 Hazardous areas
A4.2 Ventilation
A4.3 Paints
A5 Use of testing equipment
A5.1 Instructions
A5.2 Routine check
A5.3 Warning signs
A5.4 Protective clothing
A6 Earthing
Appendix B
B1 Scope
B2 Principle
B3 Calibration frequency
B4 Calibration voltages
B5 Stability and precision of output
B6 Information to accompany an instrument requiring calibration
Appendix C
C1 Scope
C2 Principle
C3 Methods
C3.1 Method A—Coating on test plate
C3.1.1 Apparatus
C3.1.2 Procedure
C3.2 Method B—Using insulating shims
C3.2.1 Apparatu
C3.2.1.1 Insulating sheets (see Note)
C3.2.1.2 Steel plate
C3.2.2 Procedure
Appendix D
D1 Scope
D2 General
Appendix E
Cited references in this standard
Site testing of protective coatings, Method 7: Determination of surface temperature
Glossary of paint and painting terms
AS/NZS 2243.7
Safety in laboratories, Part 7: Electrical aspects
Paints and related materials — Methods of test, Method 101.5: Conditions of test — Temperature and humidity control
Voltage measurement — Sphere-gap method (one sphere earthed)
Content history
AS 3894.1-2002 Rec:2013
DR 01385
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