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ASTM B916-01(2013)e1

(Test Method)

Standard Test Method for Adherence of Porcelain Enamel Coatings to Sheet Metal

Standard Test Method for Adherence of Porcelain Enamel Coatings to Sheet Metal

SIGNIFICANCE AND USE
2.1 The measurement of adherence in porcelain enamel systems, such as ground coat, ground coat/cover coat, and direct-on cover-coat enamels, is an important procedure for monitoring process variables in metal preparation, enamel application thickness, steel selection, and enamel selection, as well as assuring the ultimate quality of the finished product.
SCOPE
1.1 The scope of this test method is:  
1.1.1 To determine quantitatively the amount of enamel remaining after the porcelain enamel coating specimen has been deformed;  
1.1.2 To standardize the deformation parameters for testing adherence of porcelain enamel to sheet metal; and,  
1.1.3 To provide a quantitative adherence rating scale for comparison to reference standards.  
1.2 This adherence test method is applicable to porcelain enamel coatings on substrates from 18 to 24 gauge (0.0478 to 0.025 in. or from 1.214 to 0.654 mm).  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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.

General Information

Status
Historical
Publication Date
28-Feb-2007
ICS
25.220.50 - Enamels
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.12 - Materials for Porcelain Enamel and Ceramic-Metal Systems
Current Stage
Ref Project

Relations

Replaces
ASTM B916-01(2007) - Standard Test Method for Adherence of Porcelain Enamel Coatings to Sheet Metal
Effective Date
01-Mar-2007
Referred By
ASTM C286-22 - Standard Terminology Relating to Porcelain Enamel and Ceramic-Metal Systems
Effective Date
01-Mar-2007

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ASTM B916-01(2013)e1 - Standard Test Method for Adherence of Porcelain Enamel Coatings to Sheet MetalASTM B916-01(2013)e1 - Standard Test Method for Adherence of Porcelain Enamel Coatings to Sheet Metal
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ASTM B916-01(2013)e1 - Standard Test Method for Adherence of Porcelain Enamel Coatings to Sheet Metal
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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
´1
Designation: B916 − 01 (Reapproved 2013)
Standard Test Method for
Adherence of Porcelain Enamel Coatings to Sheet Metal
This standard is issued under the fixed designation B916; 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.
ε NOTE—Abstract and ratings in Figures 3 and 4 were added editorially in May 2013.
INTRODUCTION
The purpose of this test is to provide a standardized procedure to determine and rate the impact
adhesion of porcelain enamels on sheet steel.
1. Scope 3. Apparatus
1.1 The scope of this test method is: 3.1 Drop Weight Deformation Device , see Figs. 1 and 2.
1.1.1 To determine quantitatively the amount of enamel
3.2 The drop weight deformation device as shown in Fig. 1
remaining after the porcelain enamel coating specimen has
shall impart a single impact blow from a hemispherical
been deformed;
indenter to a coated specimen supported over a sharp-edged
1.1.2 To standardize the deformation parameters for testing
bottomless die. The area of the deformation and the concomi-
adherence of porcelain enamel to sheet metal; and,
cant damage to the coating is largely influenced by the size of
1.1.3 To provide a quantitative adherence rating scale for
the hemispherical indenter; the die opening size and edge
comparison to reference standards.
sharpness; and, the energy of the blow at impact.
1.2 This adherence test method is applicable to porcelain
3.3 A satisfactory degree of deformation and damage are
enamel coatings on substrates from 18 to 24 gauge (0.0478 to
obtained if the conditions in 3.2 use the following parameters:
0.025 in. or from 1.214 to 0.654 mm).
0.50 in. (12.7 mm) diameter hemispherical indenter, 0.75 in.
1.3 The values stated in inch-pound units are to be regarded (19.1 mm) diameter bottomless die (lower plunger guide in
as standard. The values given in parentheses are mathematical Fig. 1) with sharp edge, and 80 in./lb (9.03 J) energy at impact.
conversions to SI units that are provided for information only
3.4 Deformation Devices, of other designs may be used
and are not considered standard.
provided that the parameters in 3.3 are used.
1.4 This standard does not purport to address all of the
3.5 Adherence Reference Standards, see 7.1.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 4. Test Specimens
priate safety and health practices and determine the applica-
4.1 The test specimens shall be flat enameled panels not less
2 2
bility of regulatory limitations prior to use.
in size than 4 in. (101.6 mm ). Larger sizes and shapes may be
used provided that a flat surface can be held firmly against and
2. Significance and Use
parallel to the lower plunger guide during deformation.
2.1 The measurement of adherence in porcelain enamel
5. Safety Precautions
systems, such as ground coat, ground coat/cover coat, and
5.1 During the procedure in 6.1, fine enameled chips may be
direct-on cover-coat enamels, is an important procedure for
released with some force from the steel surface; therefore, it is
monitoring process variables in metal preparation, enamel
recommended that personnel in the immediate vicinity of the
application thickness, steel selection, and enamel selection, as
test wear safety goggles.
well as assuring the ultimate quality of the finished product.
6. Procedure
6.1 Specimen Deformation—The hammer weight of the
This test method is under the jurisdiction ofASTM Committee B08 on Metallic
suggested drop weight device is 5 lb (2268 g), which requires
and Inorganic Coatings and is the direct responsibility of Subcommittee B08.12 on
Materials for Porcelain Enamel and Ceramic-Metal Systems.
Current edition approved March 1, 2007. Published May 2013. Originally A drop weight device that has been found suitable is available from Pacific
approved in 2001. Last previous edition approved in 2007 as B916 – 07 (2007). Scientific Co., Gardner/Neotech Instrument Div., 2431 Linden Lane, Silver Spring,
DOI: 10.1520/B0916-01R13E01. MD 20910.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2
...

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5.1 The results of this test indicate whether or not a sheet steel will cause reboiling under one given set of enameling conditions and enable the enamel processor to establish a possible source of imperfections in the finished coating.  
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