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The standard outlines two main methods for evaluation, both requiring the use of a reflected light metallurgical microscope:
E2109 Standard Test Methods for Determining Area Percentage Porosity in Thermal Sprayed Coatings. ASTM International
: This method uses computerized image analyzers to calculate porosity more objectively, though it requires careful calibration to avoid "halo effects"—where the equipment incorrectly detects phase boundaries as pores. Critical Requirements for Accurate Testing
: It provides the methods for measurement but does not define what levels of porosity are "acceptable"; those limits are typically set by specific project requirements or industry contracts. Key Test Methods Defined
: Technicians compare a cross-section of the coating under high magnification against a series of standard reference images that represent various porosity levels.
: The standard describes how to measure the area percentage of porosity through visual comparison or automated tools.
: Samples must be prepared according to ASTM Guide E1920 . Poor preparation can create "artifacts" like smearing or pullouts that look like pores but aren't, leading to false results.
: Testing must be done by someone familiar with TSC visual features to distinguish between actual porosity and oxides. How to Access the ASTM E2109-01 PDF
ASTM standards are copyrighted documents. You can obtain the official or its latest reapproved version through authorized distributors: E2109 Standard Test Methods for Determining Area ... - ASTM
The standard outlines two main methods for evaluation, both requiring the use of a reflected light metallurgical microscope:
E2109 Standard Test Methods for Determining Area Percentage Porosity in Thermal Sprayed Coatings. ASTM International
: This method uses computerized image analyzers to calculate porosity more objectively, though it requires careful calibration to avoid "halo effects"—where the equipment incorrectly detects phase boundaries as pores. Critical Requirements for Accurate Testing astm e2109-01 pdf
: It provides the methods for measurement but does not define what levels of porosity are "acceptable"; those limits are typically set by specific project requirements or industry contracts. Key Test Methods Defined
: Technicians compare a cross-section of the coating under high magnification against a series of standard reference images that represent various porosity levels. The standard outlines two main methods for evaluation,
: The standard describes how to measure the area percentage of porosity through visual comparison or automated tools.
: Samples must be prepared according to ASTM Guide E1920 . Poor preparation can create "artifacts" like smearing or pullouts that look like pores but aren't, leading to false results. Key Test Methods Defined : Technicians compare a
: Testing must be done by someone familiar with TSC visual features to distinguish between actual porosity and oxides. How to Access the ASTM E2109-01 PDF
ASTM standards are copyrighted documents. You can obtain the official or its latest reapproved version through authorized distributors: E2109 Standard Test Methods for Determining Area ... - ASTM
