ASTM D7091
Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals
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About This Item
ASTM D7091 is the ASTM standard for the nondestructive measurement of dry film thickness on nonmagnetic coatings applied to ferrous metals and on nonmagnetic, nonconductive coatings applied to non-ferrous metals. It is used to support consistent coating inspection by defining a practical measurement approach for common metal substrate and coating combinations. For buyers, inspectors, and quality teams, this standard helps align testing practices with a recognized technical document and supports more reliable film thickness evaluation.
Overview of ASTM D7091
The ASTM D7091 standard provides a recognized practice for measuring dry film thickness without damaging the coating system. Its scope is focused on coatings applied to ferrous and non-ferrous metals where the coating and substrate properties make nondestructive thickness measurement appropriate. As a technical reference, it is commonly used to support consistent inspection methods, help reduce measurement variation, and improve communication between suppliers, applicators, and quality control personnel.
Common use cases of ASTM D7091
This standard is commonly used during coating inspection and acceptance checks for metal parts, fabricated components, and finished assemblies where dry film thickness needs to be verified. It is relevant when working with nonmagnetic coatings on ferrous metals and nonmagnetic, nonconductive coatings on non-ferrous metals. ASTM D7091 is also useful in workflows that rely on coating thickness gauges and documented quality control procedures, especially when nondestructive testing is preferred to preserve the coated surface.
Benefits of using ASTM D7091
Using ASTM D7091 can help improve measurement consistency, support compliance with project or procurement requirements, and reduce the risk of coating-related disputes. Because it addresses nondestructive thickness measurement, it is well suited for quality control and product evaluation where the coating must remain intact. It also provides a clear basis for comparing results across inspections, which can help teams make better decisions about coating performance, acceptance, and process control.
- Nondestructive dry film thickness measurement
- Ferrous and non-ferrous metal substrates
- Nonmagnetic coating systems
- Quality control and inspection support
- Consistent coating evaluation practice
- Publication Date: 2022-06-23
- Publisher: ASTM
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