ASTM D2197-98

Standard Test Method for Adhesion of Organic Coatings by Scrape Adhesion

SCOPE
1.1 This test method covers the determination of the adhesion of organic coatings such as paint, varnish, and lacquer when applied to smooth, flat (planar) panel surfaces.  
1.2 This standard 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.>

General Information

• Status: Historical
• Publication Date: 09-Feb-1998
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.23 - Physical Properties of Applied Paint Films

Relations

• Replaced By: ASTM D2197-98(2002) - Standard Test Method for Adhesion of Organic Coatings by Scrape Adhesion
• Effective Date: 10-Feb-1998

Standards Content (Sample)

Designation: D 2197 – 98
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
1
Adhesion of Organic Coatings by Scrape Adhesion
This standard is issued under the fixed designation D 2197; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This method has been approved for use by agencies of the Department of Defense.
1. Scope 4. Significance and Use
1.1 This test method covers the determination of the adhe- 4.1 Coatings to perform satisfactorily must adhere to the
sion of organic coatings such as paint, varnish, and lacquer substrates on which they are applied. This test method has been
when applied to smooth, flat (planar) panel surfaces. found useful in differentiating the degree of adhesion of
1.2 The values stated in inch-pound units are to be regarded coatings to substrates. It is most useful in providing relative
as the standard. The values given in parentheses are for ratings for a series of coated panels exhibiting significant
information only. differences in adhesion.
1.3 This standard does not purport to address all of the 4.2 Studies performed in a laboratory using the loop stylus
safety concerns, if any, associated with its use. It is the specified in the previous edition showed meaningful adhesion
responsibility of the user of this standard to establish appro- data were impossible when loads of 10 to 20 kg were required
priate safety and health practices and determine the applica- to break the surface of a solvent based coating. The chrome
bility of regulatory limitations prior to use. platted loop stylus chattered and skipped across the coating
surface when loads of this magnitude were required. Similar
2. Referenced Documents
meaningless data were obtained when powder coatings were
2.1 ASTM Standards:
tested that required more than 10 kg to break the surface.
D 609 Practice for Preparation of Cold-Rolled Steel Panels Therefore, testing under these conditions is not applicable.
for Testing Paint, Varnish, Conversion Coatings, and
2
5. Apparatus
Related Coating Products
D 823 Practices for Producing Films of Uniform Thickness 5.1 Application Equipment, as described in Practices D 823.
2
of Paint, Varnish, and Related Products on Test Panels 5.2 Film-Thickness Measuring Apparatus, as described in
D 1005 Test Methods for Measurement of Dry-Film Thick- Test Methods D 1005, D 1186, or D 1400.
2
ness of Organic Coatings Using Micrometers 5.3 Balanced Beam, Scrape Adhesion Tester (Figs. 1 and
D 1186 Test Methods for Nondestructive Measurement of 2), consisting of a balanced beam to which is secured a
Dry-Film Thickness of Nonmagnetic Coatings Applied to platform for supporting weights, and a rod at an angle of 45°
2
a Ferrous Base that holds the scraping loop. The rod shall be set so that the
D 1400 Test Methods for Nondestructive Measurement of scraping loop contacts test surfaces directly below the weights.
1
Dry Film Thickness of Nonconductive Coatings Applied to The loop shall be ⁄16-in. (1.6-mm) diameter rod, bent into a
2
a Nonferrous Metal Base “U” shape with an outside radius of 0.128 6 0.002 in. (3.25 6
0.05 mm) and hardened to Rockwell HRC 56 to 58, and shall
3. Summary of Test Method
be a smooth finish. The loop can be either chromium plated,
3.1 The materials under test are applied at uniform thickness
nickel plated, or heat treated polished steel, as agreed upon
to flat panels, usually sheet metal of uniform surface texture. between the purchaser and the supplier. These testers are
After drying, the adhesion is determined by pushing the panels
adjustable to accommodate flat, metallic, and nonmetallic
beneath a rounded stylus or loop that is loaded in increasing specimens to 0.5-in. (12-mm) thick and 4 to 16 in. (100 to 400
1
amounts until the coating is removed from the substrate
mm) wide and long; the specimen should be at least ⁄2-in.
surface. (12-mm) wide.
6. Preparation of Specimens
1
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
6.1 Apply the materials under test to panels of the compo-
and Related Coatings, Materials, and Applications and is the direct responsibility of
sition and surface condition on which it is desired to determine
Subcommittee D01.23 on Physical Properties of Applied Paint Films. Current
adhesion. The panel material (6.1.1), surface preparation,
edition approved Feb. 10, 1998. Published October 1998. Originally published as
e1
D 2197 – 63 T. Last previous edition D 2197 – 86(1991) .
thickness, and number of coats shall be specified or agreed
2
Annual Book of ASTM Standards, Vol 06.01.
1

---------------------- Page: 1 ----------------------
D 2197
FIG. 1 Balanced-Be
...