• AS 3894.3-2002

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    Site testing of protective coatings Determination of dry film thickness

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  06-07-2002

    Publisher:  Standards Australia

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    Table of Contents - (Show below) - (Hide below)

    1 - AS 3894.3-2002 SITE TESTING OF PROTECTIVE COATINGS - DETERMINATION OF DRY FILM THICKNESS
    3 - PREFACE
    4 - CONTENTS
    5 - FOREWORD
    6 - METHOD
    6 - 1 SCOPE
    6 - 2 REFERENCED DOCUMENTS
    6 - 3 DEFINITIONS
    6 - 3.1 Dry film thickness
    6 - 3.2 Primary standards
    6 - 3.3 Reference substrate
    7 - 3.4 Secondary standards
    7 - 4 TEST METHODS
    7 - 5 PRECAUTIONS
    8 - 6 INSPECTION PERIOD
    8 - 7 INSPECTION PLANS
    8 - 7.1 General
    8 - 7.2 Point reading
    8 - 7.3 Large surface areas
    12 - 7.4 Small surface areas
    12 - 7.5 Statistical sampling
    12 - 8 INSPECTION OBJECTIVES
    12 - 8.1 General
    12 - 8.2 Severe environment
    13 - 8.3 Atmospheric exposure
    13 - 8.4 Large numbers of small components
    13 - 9 MAGNETIC INSTRUMENT METHOD-METHOD A
    13 - 9.1 Scope
    13 - 9.2 Principle
    13 - 9.3 Apparatus
    13 - 9.3.1 Calibration standards
    13 - 9.3.2 Magnetic pull-off instrument
    13 - 9.4 Preparation of test surface
    14 - 9.5 Precautions
    14 - 9.5.1 General
    14 - 9.5.2 Reproducibility
    14 - 9.5.3 Vibration
    14 - 9.5.4 Measuring
    14 - 9.5.5 Probe position
    14 - 9.6 Procedure
    15 - 9.7 Report
    15 - 10 MAGNETIC INDUCTION AND EDDY CURRENT METHODS-METHOD B
    15 - 10.1 Scope
    15 - 10.2 Application
    16 - 10.3 Principle
    16 - 10.4 Apparatus
    16 - 10.5 Preparation of test surface
    16 - 10.6 Precautions
    17 - 10.7 Procedure
    18 - 10.8 Report
    19 - APPENDIX A - MICROGRAPHIC EXAMINATION OF CROSS-SECTIONS
    19 - A1 SCOPE
    19 - A2 PRINCIPLE
    19 - A3 APPARATUS
    19 - A4 PREPARATION OF TEST SPECIMENS
    19 - A4.1 General
    19 - A4.2 Mounting of test specimen (see Note 1)
    19 - A4.3 Grinding and polishing
    20 - A5 PROCEDURE
    20 - A6 REPORT
    22 - APPENDIX B - MICROSCOPIC MEASUREMENT OF PAINT FLAKES
    22 - B1 SCOPE
    22 - B2 PRINCIPLE
    22 - B3 APPARATUS
    22 - B3.1 Optical microscope
    22 - B3.2 Camera
    22 - B4 PREPARATION OF THE TEST SPECIMEN
    22 - B5 PROCEDURE
    23 - B6 REPORT
    24 - APPENDIX C - WET FILM THICKNESS BY COMB GAUGE
    24 - C1 SCOPE
    24 - C2 PRINCIPLE
    24 - C3 APPARATUS - COMB GAUGE
    24 - C4 PROCEDURE
    24 - C5 ESTIMATION OF DRY FILM THICKNESS
    25 - C6 REPORT
    29 - APPENDIX D - CALIBRATION OF MEASURING INSTRUMENTS
    29 - D1 SCOPE
    29 - D2 GENERAL
    29 - D3 CALIBRATION STANDARDS
    29 - D3.1 General
    29 - D3.2 Primary standards
    29 - D3.3 Secondary standards
    29 - D4 REFERENCE SUBSTRATES
    30 - D5 PROCEDURE
    30 - D5.1 General
    30 - D5.2 Magnetic pull-off gauges
    30 - D5.3 Magnetic induction and eddy current instruments
    32 - APPENDIX E - A SAMPLE REPORT FORM FOR DRY FILM THICKNESS TESTING*

    Abstract - (Show below) - (Hide below)

    This Standard provides practical test methods for the on-site determination of the range of thicknesses and the mean dry film thickness of a protective coating system, or its component coats, upon a metallic structure or fabrication. The coated fabrications to which the methods may be applied include tanks or reservoirs, bridge girders, equipment used in processing chemicals or petroleum, pipelines, and articles such as vehicles, white goods and other items of industrial production, where there is lack of uniformity of substrate thickness, metallographic character, surface condition and the film of the protective coating.

    Scope - (Show below) - (Hide below)

    This Standard provides practical test methods for the on-site determination of the range of thicknesses and the mean dry film thickness of a protective coating system, or its component coats, upon a metallic structure or fabrication.The coated fabrications to which the methods may be applied include tanks or reservoirs, bridge girders, equipment used in processing chemicals or petroleum, pipelines, and fabricated articles such as vehicles, white goods and other items of industrial production, where there is lack of uniformity of substrate thickness, metallographic character, surface condition and the film of the protective coating.NOTES: 1 Appendix A provides a laboratory test method for the microscopic determination of the thickness of the film adhering to a substrate. This method would only be used where no other method is acceptable.2 Appendix B provides a method for determining the thickness of a flake of the coating using an optical microscope.3 ISO 2808 provides information on additional methods of determining film thickness.

    General Product Information - (Show below) - (Hide below)

    Committee CH-003
    Document Type Standard
    Product Note Reconfirmation Notice 12/11/2013
    Publisher Standards Australia
    Status Current
    Supersedes

    History - (Show below) - (Hide below)

    First published as AS 3894.3-1993.Second edition 2002.Reconfirmed 2013. Originated as AS 3894.3-1993. Second edition 2002.

    Standards Referenced By This Book - (Show below) - (Hide below)

    AS/NZS 2312:1994 Guide to the protection of iron and steel against exterior atmospheric corrosion
    AS 1580.108.2-2004 Paints and related materials - Methods of test Dry film thickness - Paint inspection gauge (Reconfirmed 2019)
    AS 1399-1990 Guide to AS 1199 - Sampling procedures and tables for inspection by attributes
    AS 2483-1982 Metal finishing - Recommended sampling plans for the inspection and testing of coatings
    AS/NZS 2312:2002 Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings
    AS 1199-1988 Sampling procedures and tables for inspection by attributes
    AS/NZS 2310:2002 Glossary of paint and painting terms (Reconfirmed 2016)
    AS 2483-2003 Metal finishing - Recommended sampling plans for the inspection and testing of coatings (ISO 4519:1980, MOD)
    AS/NZS 2310:1995 Glossary of paint and painting terms

    Standards Referencing This Book - (Show below) - (Hide below)

    AS 2699.2:2020 Built-in components for masonry construction Connectors and accessories
    AS/NZS 4361.1:2017 Guide to hazardous paint management Lead and other hazardous metallic pigments in industrial applications
    AS 4848.1-2006 Application specifications for coating systems Single coat inorganic (ethyl) zinc silicate - Solvent-borne
    AS/NZS 2310:2002 Glossary of paint and painting terms (Reconfirmed 2016)
    AS 2423-2002 Coated steel wire fencing products for terrestrial, aquatic and general use (Reconfirmed 2021)
    AS 3894.9-2003 Site testing of protective coatings Determination of adhesion
    AS 4848.1:2019 Application specifications for coating systems Single coat inorganic (ethyl) zinc silicate - Solvent-borne
    AS 4506-2005 Metal finishing - Thermoset powder coatings
    AS 4321-2001 Fusion-bonded medium-density polyethylene coating and lining for pipes and fittings (Reconfirmed 2019)
    AS/NZS 1580.108.1:1994 Paints and related materials - Methods of test Determination of dry film thickness on metallic substrates - Non-destructive methods (Reconfirmed 2013)
    AS 4795.1-2011 Butterfly valves for waterworks purposes Wafer and lugged (Reconfirmed 2022)
    AS 5100.8:2017 Bridge design Rehabilitation and strengthening of existing bridges
    AS/NZS 2312:2002 Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings
    AS 4883:2017 Air valves for sewerage
    AS/NZS 4158:2003 Thermal-bonded polymeric coatings on valves and fittings for water industry purposes
    AS 4822-2008 External field joint coatings for steel pipelines
    AS 3862:2020 External fusion-bonded epoxy coating for steel pipes
    AS 2699.1:2020 Built-in components for masonry construction Wall ties
    AS 1580.408.2-2004 Paints and related materials - Methods of test Adhesion - Knife test (Reconfirmed 2019)
    AS/NZS 2699.3:2002 Built-in components for masonry construction Lintels and shelf angles (durability requirements)
    AS/NZS 4680:2006 Hot-dip galvanized (zinc) coatings on fabricated ferrous articles (Reconfirmed 2017)
    AS 2699.3:2020 Built-in components for masonry construction Lintels and shelf angles (durability requirements)
    AS 5612-2013 Butterfly valves for general purposes
    AS 4361.1-1995 Guide to lead paint management - Industrial applications
    AS/NZS 5131:2016 Structural steelwork - Fabrication and erection
    AS 3894.5-2002 Site testing of protective coatings Determination of surface profile
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