: This method is ideal for quick, low-cost laboratory checks that do not require specialized computer software.
Measuring this area percentage is crucial for quality control and performance validation. It helps engineers monitor how changes in spray parameters (like temperature or spray distance) affect coating quality. Depending on the application—whether a coating is used for corrosion protection, thermal barriers, or electrical insulation—the level of tolerable porosity varies. As the standard states, for some uses, "some or none of this porosity may be tolerable." astm e2109-01 pdf
Excessively high or poorly distributed porosity reduces the cohesive strength of the coating, leading to premature delamination, cracking, or spalling under mechanical loads. Core Methodologies of ASTM E2109-01 : This method is ideal for quick, low-cost
determining the area fraction of porosity in thermal spray coatings using microscopic image analysis. Overview of ASTM E2109-01 Depending on the application—whether a coating is used
This guide explains everything you need to know about this standard, including how to get the ASTM E2109-01 PDF and put it to practical use.
: As of November 20, 2025, ASTM International has initiated Work Item WK97130 to revise E2109-01(2021). The rationale states: "This work item is for the review and modernization of E2109-01(2021) Standard Test Methods for Determining Area Percentage Porosity in Thermal Sprayed Coatings which is due now."