ASTM C715-90(2011)e1
(Test Method)Standard Test Method for Nickel on Steel for Porcelain Enameling by Photometric Analysis
Standard Test Method for Nickel on Steel for Porcelain Enameling by Photometric Analysis
SIGNIFICANCE AND USE
This test method is primarily used to control the nickel dipping operation to ensure that the desired level of nickel deposition is attained. It is also used to prepare test plates used for calibration in Test Method C810.
SCOPE
1.1 This test method covers the determination of the amount of nickel deposited on sheet steel during its preparation for porcelain enameling. It is a photometric method commonly used on production parts and is suitable for determining the heavier nickel deposits that may be obtained during the processing of steel for one-coat enameling.
Note 1—An alternative X-ray emission spectrometry method is Test Method C810.
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
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Standards Content (Sample)
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Designation: C715 − 90 (Reapproved 2011)
Standard Test Method for
Nickel on Steel for Porcelain Enameling by Photometric
Analysis
This standard is issued under the fixed designation C715; 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—Test Method was corrected editorially in 2011
INTRODUCTION
The test is designed to give a sufficiently accurate and rapid test of the amount of nickel deposited
on sheet steel for enameling plant control work via a photometric method. However, the approxima-
tions used in the method prevent its use where extremely accurate nickel determinations are required.
The method is applicable to control the weight of nickel coating on the metal.
1. Scope Materials by Spectrophotometry
1.1 This test method covers the determination of the amount
3. Significance and Use
of nickel deposited on sheet steel during its preparation for
3.1 This test method is primarily used to control the nickel
porcelain enameling. It is a photometric method commonly
dipping operation to ensure that the desired level of nickel
used on production parts and is suitable for determining the
deposition is attained. It is also used to prepare test plates used
heavier nickel deposits that may be obtained during the
for calibration in Test Method C810.
processing of steel for one-coat enameling.
4. Apparatus
NOTE 1—An alternative X-ray emission spectrometry method is Test
Method C810.
4.1 Photoelectric Photometer, conforming to Practice E60.
1.2 This standard does not purport to address all of the
4.2 Weighted Rubber Ring Assembly, required to confine
safety concerns, if any, associated with its use. It is the
stripping agents to a definite area, consisting of a molded
responsibility of the user of this standard to establish appro-
rubber ring and a metal outer ring. The rubber ring shall have
priate safety and health practices and determine the applica-
an inside diameter of 1.35 in. (34.3 mm) in order to encircle an
bility of regulatory limitations prior to use.
2 2
area of 0.01 ft (0.000929 m ), a wall configuration as shown
in Fig. 1, and the lower portion beveled at a 45° angle (0.78
2. Referenced Documents
rad) to reduce the contact area and ensure a better seal. The
2.1 ASTM Standards:
metal outer ring shall weigh about 3.5 lb (1.5 kg), suitably
C810 Test Method for Nickel on Steel for Porcelain Enam-
machined to fit over the top of the rubber ring as shown in Fig.
eling by X-Ray Emission Spectrometry
1.
E30 Test Methods for ChemicalAnalysis of Steel, Cast Iron,
4.2.1 The exact area covered by the rubber ring will
Open-Hearth Iron, and Wrought Iron (Withdrawn 1995)
gradually increase as the rubber ring itself is consumed by the
E60 Practice for Analysis of Metals, Ores, and Related
acidreagentused.Inthemostaccurateanalysis,theareaetched
by the rubber ring shall be calculated occasionally, factored
against the prescribed area, and that number applied to the
This test method is under the jurisdiction ofASTM Committee B08 on Metallic
reading obtained from the graph.
and Inorganic Coatings and is the direct responsibility of Subcommittee B08.12 on
Materials for Porcelain Enamel and Ceramic-Metal Systems.
4.3 Aspirator, consisting of a calibrated 500-mL flask,
Current edition approved April 1, 2011. Published April 2011. Originally
equipped with a twohole stopper, an aspirator bulb, and a
approved in 1977. Last previous edition approved in 2006 as C715 – 90 (2006).
suction tube formed from 0.079-in. (2-mm) inside diameter
DOI: 10.1520/C0715-90R11E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or capillary glass tubing.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on 5. Reagents and Materials
the ASTM website.
5.1 Reagent grade chemicals shall be used in all tests.
The last approved version of this historical standard is referenced on
www.astm.org. Unless otherwise indicated, it is intended that all reagents shall
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C715 − 90 (2011)
the steel surface are obtained as prescribed. (Iron in solution
that is dissolved from the steel surfaces has a negligible effect
on the nickel determinations.) Using the standard analytical
procedures described in 8.2, determine the percent transmis-
sion at a wavelength of approximately 525 nm for each of the
six increments of nickel sulfate standard solution. Then plot a
graph on appropriate graph paper of the percent light transmis-
sion against the known nickel concentration representing 0.2 to
NOTE 1—The outer ring is a steel disk approximately 6 by ⁄2 in. (152
2.1 g of nickel deposit per square metre of surface. The
by 13 mm), weighing approximately 3 ⁄2 lb (1.58 kg).
resulting graph, which should be a straight line, will be used to
FIG. 1 Detailed Drawing of Rubber Ring
obtain nickel-coating masses from light transmission results.
conform to the specifications of the Committee of Analytical
8. Determinations of Nickel Coating Masses
Reagents of the American Chemical Society. Other grades
8.1 Sampling a Nickel-Coated Steel Surface:
may be used, provided it is
...
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