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ASTM D4146-10

(Test Method)

Standard Test Method for Formability of Zinc-Rich Primer/Chromate Complex Coatings on Steel

Standard Test Method for Formability of Zinc-Rich Primer/Chromate Complex Coatings on Steel

SIGNIFICANCE AND USE
The results of the combined deformation and tape test are related to the ability of the coated metal to withstand stamping in factory applications.
This test can be used to control the manufacturing process or in development work to improve the product.
It should be recognized that variability in the results persist due to the test conditions and forming machine variations.
SCOPE
1.1 This test method covers the evaluation of the formability and adhesion of factory applied zinc-rich primer/chromate complex coatings on steel with thicknesses of 0.65 to 1.25 mm (0.025 to 0.05 in.) typical of those used in the coil coating industry.
1.2 The degree of oil removal prior to forming, the techniques of taping, and differences in adhesive strength of the tape can affect the adhesion rating.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement, see Section 7.

General Information

Status
Historical
Publication Date
31-May-2010
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.53 - Coil Coated Metal
Current Stage
Ref Project

Relations

Replaces
ASTM D4146-96(2003) - Standard Test Method for Formability of Zinc-Rich Primer/Chromate Complex Coatings on Steel (Withdrawn 2009)
Effective Date
01-Jun-2010
Referred By
ASTM D3794-22 - Standard Guide for Testing Coil Coatings
Effective Date
01-Jun-2010

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ASTM D4146-10 - Standard Test Method for Formability of Zinc-Rich Primer/Chromate Complex Coatings on SteelASTM D4146-10 - Standard Test Method for Formability of Zinc-Rich Primer/Chromate Complex Coatings on Steel
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ASTM D4146-10 - Standard Test Method for Formability of Zinc-Rich Primer/Chromate Complex Coatings on Steel
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D4146 − 10
Standard Test Method for
Formability of Zinc-Rich Primer/Chromate Complex
1
Coatings on Steel
This standard is issued under the fixed designation D4146; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 dome height, n—the height of the dome formed in the
test.
1.1 Thistestmethodcoverstheevaluationoftheformability
3.1.2 indenting ball diameter, n—the diameter of the
and adhesion of factory applied zinc-rich primer/chromate
spherical-ended penetrator (ball) used to deform the specimen.
complex coatings on steel with thicknesses of 0.65 to 1.25 mm
5
3.1.2.1 Discussion—The 41-mm (1 ⁄8-in.) diameter ball was
(0.025 to 0.05 in.) typical of those used in the coil coating
selected because it minimizes the variability in the localized
industry.
peak strain. This size ball is commercially available and is as
1.2 The degree of oil removal prior to forming, the tech-
large as most testing machines can accommodate.
niques of taping, and differences in adhesive strength of the
3.1.3 percent strain, n—the percent elongation of scribed
tape can affect the adhesion rating.
gage lengths after forming. For the draw height of 13 mm
1.3 The values stated in SI units are to be regarded as the
5
(0.512 in.), using a 1 ⁄8-in. diameter ball, the localized peak
standard. The values given in parentheses are for information
strain is about 19 % (see Fig. 1).
only.
1.4 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 A coated specimen is biaxially stretched a given dis-
responsibility of the user of this standard to establish appro-
tance in an appropriate machine, adhesive tape is applied to the
priate safety and health practices and determine the applica-
deformed area (dome) and then pulled off, and the amount of
bility of regulatory limitations prior to use. For a specific
coating removed is compared with a photographic standard to
hazard statement, see Section 7.
determine the coating adhesion rating.
2. Referenced Documents
5. Significance and Use
2
2.1 ASTM Standards:
5.1 The results of the combined deformation and tape test
D3330/D3330M Test Method for PeelAdhesion of Pressure-
are related to the ability of the coated metal to withstand
Sensitive Tape
3
stamping in factory applications.
2.2 Other Document:
Pictorial Standards of Coating Defects
5.2 This test can be used to control the manufacturing
process or in development work to improve the product.
3. Terminology
5.3 It should be recognized that variability in the results
3.1 Definitions of Terms Specific to This Standard:
persist due to the test conditions and forming machine varia-
tions.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
6. Apparatus and Materials (see Fig. 2)
Subcommittee D01.53 on Coil Coated Metal.
CurrenteditionapprovedJune1,2010.PublishedJuly2010.Originallyapproved
6.1 Forming Machine, equipped with a spherical-ended
in 1983. Last previous edition approved in 2003 as D 4146 – 96 (2003) which was
penetrator to deform the specimen with appropriate dies, until
withdrawn February 2009 and reinstated in June 2010. DOI: 10.1520/D4146-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the required height is obtained, and clamping arrangement to
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
hold the specimen with a minimum pressure of 8.9 kN (2000
Standards volume information, refer to the standard’s Document Summary page on
lbf).
the ASTM website.
3
6.1.1 The speed of forming shall be between 4.8 and 25
Copies of the pictorial photographic reference standard are contained in the
publication Pictorial Standards of Coating Defects and may be obtained from the
mm/min (0.2 and 1.0 in./min). The speed is usually slowed to
Federation of Societies for Coatings Technology (FSCT), 492 Norristown Rd., Blue
measure more accurately the final height as shown on the dial
Bell, PA 19422-2350, http://www.coatingstech.org. The silver halide gelatin photo-
indicator, but the final punch speed shall be controlled at 6 mm
graphs are intended to be the only primary reference standards for this test method.
Thereproductionsoftheminthistestmethodareforthepurposeofillustrationonly. (0.24 in.)/min maximum.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4146 −
...

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