: The standard describes how to measure the area percentage of porosity through visual comparison or automated tools.
: 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
is the globally recognized standard for Determining Area Percentage Porosity in Thermal Sprayed Coatings (TSCs) . This standard provides a rigorous framework for assessing the quality and performance of coatings used in critical industrial applications, such as aerospace and chemical processing. Scope and Purpose of ASTM E2109-01 astm e2109-01 pdf
: It applies specifically to Thermal Sprayed Coatings (TSCs) .
The standard outlines two main methods for evaluation, both requiring the use of a reflected light metallurgical microscope: : The standard describes how to measure the
The primary goal of ASTM E2109-01 is to establish consistent procedures for "porosity ratings" on metallographic specimens. Because porosity—the presence of voids or "linear detachments" where coating layers haven't bonded—directly impacts a coating's corrosion resistance and structural integrity, having a standardized measurement is essential.
E2109 Standard Test Methods for Determining Area Percentage Porosity in Thermal Sprayed Coatings. ASTM International This standard provides a rigorous framework for assessing
: 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
For a "ASTM E2109-01 PDF" to be useful in a lab setting, it must be used alongside proper specimen preparation.