ASTM-E2338 2022(Redline)

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E2338-22 Standard Practice for Characterization of Coatings Using Conformable Eddy Current Sensors without Coating Reference Standards (Redline)

Published By	Publication Date	Number of Pages
ASTM	2022	11

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Categories: 25.220.01 - Surface treatment and coating in general, ASTM

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Description

ASTM E2338-22

Redline Standard: Standard Practice for Characterization of Coatings Using Conformable Eddy Current Sensors without Coating Reference Standards

ASTM E2338

Scope

1.1 This practice covers the use of conformable eddy current sensors for nondestructive characterization of coatings without standardization on coated reference parts. It includes the following: (1) thickness measurement of a conductive coating on a conductive substrate, (2) detection and characterization of local regions of increased porosity of a conductive coating, and (3) measurement of thickness for nonconductive coatings on a conductive substrate or on a conductive coating. This practice includes only nonmagnetic coatings on either magnetic (μ ≠ μ₀) or nonmagnetic (μ = μ₀) substrates. In addition to discrete coatings on substrates, this practice can also be used to measure the effective thickness of a process-affected zone (for example, shot peened layer for aluminum alloys, alpha case for titanium alloys) and to assess the condition of other layered media such as joints (for example, lap joints and skin panels over structural supports). For specific types of coated parts, the user may need a more specific procedure tailored to a specific application.

1.2 Specific uses of conventional eddy current sensors are covered by Practices D7091 and E376 and the following test methods issued by ASTM: B244 and E1004. Guidance for the use of conformable eddy current sensor arrays is provided in Guide E2884.

1.3 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

coating thickness; conformable sensor; eddy current probe; nondestructive testing; process-affected zone;

ICS Code

ICS Number Code 25.220.01 (Surface treatment and coating in general)

DOI: 10.1520/E2338-22

Additional information

Standard Title	E2338-22 Standard Practice for Characterization of Coatings Using Conformable Eddy Current Sensors without Coating Reference Standards (Redline)
Published Code	ASTM
Publication Date	2022
Pages Count	11
ICS Codes	25.220.01 - Surface treatment and coating in general