ASTM D5796-99
Historical Standard: ASTM D5796-99 Standard Test Method for Measurement of Dry Film Thickness of Thin Film Coil-Coated Systems by Destructive Means Using a Boring Device
SUPERSEDED (see Active link, below)
ASTM D5796
1. Scope
1.1 This test method covers the measurement of dry film thickness (DFT) of coating films by microscopic observation of a precision-cut shallow-angle crater in the coating film.
1.2 The substrate may be any rigid, metallic material, for example, cold-rolled steel, hot-dipped galvanized steel, aluminum, etc. The substrate should be planar.
Note-Variations in the surface profile of the substrate may result in nonrepresentative organic coating thickness readings. This condition may exist over substrates such as hot-dipped, coated steel sheet. This is true of all 'precision cut' methods that are used to determine dry film thickness of organic coatings.1.3 The range of thickness measurement is 0 to 3.5 mils (0 to 88 [mu]m).
1.4 Measurements may be made on coil-coated sheet, certain formed products, or on test panels.
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D3794 Guide for Testing Coil Coatings
Keywords
borer bit; boring; crater; destructive; dry film; measure stage; micrometer; optical measurement; thickness; thin films; video camera; Boring devices; Coatings (paint/related applications); Coating thickness; Destructive testing--coatings; Dry film thickness;
ICS Code
ICS Number Code 17.040.20 (Properties of surfaces)
DOI: 10.1520/D5796-99
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