Astm E2109-01 Pdf High Quality -
| Designation | Status | Key Points | |---|---|---| | ASTM E2109-01 | Original (2001) | Inactive; historical reference only | | ASTM E2109-01(2007) | Reapproved 2007 | Inactive; use current version | | ASTM E2109-01(2014) | Reapproved 2014 | Inactive; use current version | | ASTM E2109-01(2021) | Current active version | Most up-to-date |
Understanding ASTM E2109-01: The Standard for Determining Area Fraction Using Automated Image Analysis
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Hard, brittle coatings may suffer from micro-fracturing where pieces of the coating are pulled out, artificially inflating the measured porosity. Step-by-Step Testing and Analysis (Method B)
High porosity creates interconnected pathways. These pathways allow corrosive liquids or gases to penetrate the coating and attack the underlying substrate.
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Before conducting measurements, labs must metallographically prepare cross-sections according to . Poor preparation introduces two primary defects that skew results:
Thermal sprayed coatings are widely used to protect surfaces from wear, corrosion, and high temperatures across a diverse range of industries, including aerospace, automotive, power generation, and medical devices. During the high-velocity spraying process, TSCs are highly susceptible to the formation of porosity—tiny voids within the coating structure—due to a lack of fusion between sprayed particles or the expansion of gases generated during spraying.
Because variations in spray distances, gas expansion rates, and particle speeds shift these internal void structures, technicians rely on ASTM E2109-01 to consistently evaluate application performance. Scope and Core Prerequisites Printed editions are also available for the same
To ensure statistical accuracy, the following steps are typically followed in professional labs:
2001
The standard outlines two main methods for evaluation, both requiring the use of a reflected light metallurgical microscope:
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