ASTM D7091 - 22
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
| Aviso: | Las normas ASTM en lectura se visualizan a través del área decliente. Los archivos no se pueden descargar |
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| Fecha edición: |
2022-06-01
En Vigor
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| Idiomas disponibles: | Inglés |
| Resumen: | |
| Keywords: | coatings; coating thickness; dry film thickness; eddy current thickness gages; magnetic gages; magnetic method; nondestructive thickness; paint thickness; thickness testing; |
| Scope: | 1.1 This practice describes the use of magnetic and eddy current gages for dry film thickness measurement. This practice is intended to supplement the manufacturers’ instructions for the manual operation of the gages and is not intended to replace them. It includes definitions of key terms, reference documents, the significance and use of the practice, the advantages and limitations of coating thickness gages, and a description of test specimens. It describes the methods and recommended frequency for verifying the accuracy of gages and for adjusting the equipment and lists the reporting recommendations. 1.2 These procedures are not applicable to coatings that will be readily deformed under the load of the measuring gages/probes, as the gage probe must be placed directly on the coating surface to obtain a reading. Provisions for measuring on soft or tacky coatings are described in 5.7. 1.3 Coating thickness can be measured using a variety of gages. These gages are categorized as “magnetic pull-off” and “electronic.” They use a sensing probe or magnet to measure the gap (distance) between the base metal and the probe. This measured distance is displayed as coating thickness by the gages. 1.4 Coating thickness can vary widely across a surface. As a result, obtaining single-point measurements may not accurately represent the actual coating system thickness. SSPC-PA 2 prescribes a frequency of coating thickness measurement based on the size of the area coated. A frequency of measurement for coated steel beams (girders) and coated test panels is also provided in the appendices to SSPC-PA 2. The governing specification is responsible for providing the user with the minimum and the maximum coating thickness for each layer, and for the total coating system. 1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.6 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. 1.7 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. |
| ICS: | 17.040.20 - Estado de las superficies |
| CTN: | D01.23 - D01.23 |
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Otras Relaciones |
Es referenciada por E1797-12R17E01 Es referenciada por D6037-21 Es referenciada por D3276-21 Es referenciada por D4619-12R18 Es referenciada por D4141_D4141M-22 Es referenciada por A0882_A0882M-20 Es referenciada por D6676_D6676M-21 Es referenciada por E2338-22 Es referenciada por D6386-22 Es referenciada por D5064-16AR21 Es referenciada por D0522_D0522M-17R21 Es referenciada por D5178-21 Es referenciada por D5163-16R21 Es referenciada por D4366-16R21 Es referenciada por D5065-17R21 Es referenciada por C1847-21 Es referenciada por D6279-20 Es referenciada por E0376-19 Es referenciada por B1000-21 Es referenciada por A1113_A1113M-20E01 |
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