ASTM C283-97(2008)

Standard Test Methods for Resistance of Porcelain Enameled Utensils to Boiling<br> Acid

SIGNIFICANCE AND USE
Test Method A provides the producers of porcelain enameled utensils with a quality control method of testing for resistance to boiling acid for parts randomly selected from the production line.
Test Method B provides the supplier of porcelain enamel raw materials with a laboratory method for testing the resistance of different coatings (intended for use on utensils) to boiling acid.
SCOPE
1.1 These test methods cover the determination of the resistance of porcelain enamel coatings used on utensils to attack by boiling acid.
1.2 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: 31-Jul-2008
• ICS: 25.220.50 - Enamels
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.12 - Materials for Porcelain Enamel and Ceramic-Metal Systems

Relations

• Replaces: ASTM C283-97(2002) - Standard Test Method for Resistance of Porcelain Enameled Utensils to Boiling Acid
• Effective Date: 01-Aug-2008
• Replaced By: ASTM C283-13 - Standard Test Methods for Resistance of Porcelain Enameled Utensils to Boiling Acid
• Effective Date: 01-May-2013
• Referred By: ASTM C286-22 - Standard Terminology Relating to Porcelain Enamel and Ceramic-Metal Systems
• Effective Date: 01-Aug-2008

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C283 − 97(Reapproved 2008)
Standard Test Methods for
Resistance of Porcelain Enameled Utensils to Boiling
Acid
This standard is issued under the fixed designation C283; 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 3.4 Boiling Acid Resistance Apparatus, as shown in Fig. 1.
Three sets will be required.
1.1 These test methods cover the determination of the
resistance of porcelain enamel coatings used on utensils to 3.5 Cutting Equipment, suitable for cutting a 3 ⁄4-in. (82-
attack by boiling acid. mm) diameter plate from the bottom of a porcelain-enameled
steel utensil, as follows:
1.2 This standard does not purport to address all of the
3.5.1 Punch and Die (Fig. 2),
safety concerns, if any, associated with its use. It is the
3.5.2 Shears,
responsibility of the user of this standard to establish appro-
3.5.3 Abrasive Cut-off Wheel,
priate safety and health practices and determine the applica-
3.5.4 Cutting Torch, or
bility of regulatory limitations prior to use.
3.5.5 Any Other Suitable Equipment
2. Significance and Use
3.6 Analytical Balance, having a sensitivity of 0.0001 g.
2.1 Test Method A provides the producers of porcelain
4. Reagent
enameled utensils with a quality control method of testing for
4.1 The test solution shall contain6gofACS grade citric
resistance to boiling acid for parts randomly selected from the
acid per 94 g of distilled water and shall be prepared fresh for
production line.
each test.
2.2 Test Method B provides the supplier of porcelain
enamel raw materials with a laboratory method for testing the
5. Test Specimens
resistance of different coatings (intended for use on utensils) to
5.1 The test specimens shall consist of three plates, 3 ⁄4 in.
boiling acid.
(82 mm) in diameter, cut from the bottoms of three identical
utensils.
TEST METHOD A
NOTE 1—“Identical utensils” signifies utensils of the same size, shape,
3. Apparatus
and finish.
3.1 Hot Plate, capable of maintaining over its entire surface
6. Preparation of Test Specimens
a uniform temperature that will keep the test solution at a
rolling boil (see section 7.5). The heating element should 6.1 After the test specimens have been cut from the utensils,
file their edges with a triangular file to remove any loose
occupy an area at least 8 in. (203 mm) in diameter.
enamel chips.
3.2 Chemical Glassware—Beakers, a desiccator, and a
6.2 Thoroughly wash the test specimens with soap and
500-mL graduated cylinder.
water to remove any grease picked up in handling. Rinse with
3.3 Drier, capable of maintaining a temperature of at least
distilledwater.Placethespecimensinadrierat220°F(104°C).
220°F (104°C).
After 10 min, remove the test specimens and place them in a
desiccator containing calcium chloride.
These test methods are under the jurisdiction of ASTM Committee B08 on
7. Procedure
Metallic and Inorganic Coatings and are the direct responsibility of Subcommittee
B08.12 on Materials for Porcelain Enamel and Ceramic-Metal Systems.
7.1 Level the hot plate, turn the switch on in the high heat
Current edition approved Aug. 1, 2008. Published September 2008. Originally
position, and allow to preheat for at least 1 h to obtain a
approved in 1951. Last previous edition approved in 2002 as C283 – 97 (2002).
uniform temperature over the entire heating element.
DOI: 10.1520/C0283-97R08.
Test Method A is based on the boiling acid resistance test developed by the
7.2 Remove the test specimens, one at a time, from the
Enameled Utensil Manufacturers’ Council; see Section 16 of Commercial Standard
desiccator, hold at the edges, and inspect the edges for loose
CS100-47, Porcelain Enameled Steel Utensils, United States Department of Com-
merce. chips. Remove any chips found, before the initial weighing.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C283 − 97 (2008)
in. mm in. mm in. mm in. mm
1 1 1
⁄16 1.6 1 ⁄4 32 2.5 64 4 ⁄16 103
1 25 1 1
⁄8 3.2 1 ⁄32 45 3 ⁄4 82 4 ⁄8 105
1 1 3 1
⁄4 6.4 2 ⁄4 57 3 ⁄8 86 5 ⁄2 140
⁄8 9.5 2.31 59 4 102 14 356
(a) Assembly (b) Details
FIG. 1 Boiling-Acid Resistance Apparatus
7.3 Weigh each specimen on an analytical balance, record- solutions begin to boil, decrease the wattage input so that the
ing its weight to the nearest 0.0001 g. solutions remain at a rolling boil for the remainder of the test
period.
7.4 Place the heat-resistant gasket above the hole in the
base-plate of the boiling-acid resistance apparatus (Fig. 1). 7.6 At the end of the test period, remove the units and
Place the test specimen over the gasket, with the surface from condenser tubes from the hot plate and pour out the solutions,
the inside of the utensil up. Next, place a rubber jar ring on the then rinse the insides of the tubes and the test specimens with
test specimen. This serves as a seal between the test specimen distilled water, and dismantle the apparatus. Remove the test
and the heat-resistant glass tube, which shall be placed over it. specimens, rinse again with distilled water scrub the test
Place another rubber jar ring on top of the glass tube, set the specimens gently with a nylon brush (10 t
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