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Standard Test Method for Determining the Hardness of Organic Coatings with a Sward-Type Hardness Rocker
Automatische name übersetzung:
Standard Test Methode zur Bestimmung der Härte von organischen Beschichtungen mit Sward-Härte Typ Rocker
NORM herausgegeben am 1.11.2012
Bezeichnung normen: ASTM D2134-93(2012)
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.11.2012
SKU: NS-19396
Zahl der Seiten: 3
Gewicht ca.: 9 g (0.02 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
hardness, hardness tests&mdash,Sward hardness, surface hardness, ICS Number Code 25.220.60 (Organic coatings)
Significance and Use | ||||||||||||
3.1 Sward-type hardness rocker instruments have been used by the coatings industry for more than a half a century as a nondestructive test instrument to measure cure and ultimate surface hardness of organic coatings (see Refs. 3.2 In previous task group work designed to establish an ASTM method for measuring hardness of organic coatings with Sward-type hardness rocker instruments, round-robin test results continually showed poor interlaboratory reproducibility. This lack of interlaboratory agreement could have resulted from dimensional variations among instruments, with the contact rocker rings as the most likely offender in that regard. There are several producers of Sward-type hardness rockers making instruments that differ among themselves in net weight and ring radius. Some of them exceed the measurements and net weight called for in this test method. 3.3 This test method, however, is useful within laboratories to quickly screen and measure the surface hardness of candidate coatings. |
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1. Scope | ||||||||||||
1.1 This test method covers the determination of the relative degree of surface hardness of organic coatings using a specific apparatus widely used in the coatings industry. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This test method does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||||||
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