ASTM A630-03

Standard Test Methods for Determination of Tin Coating Weights for Electrolytic Tin Plate

SIGNIFICANCE AND USE
This test method covers determination of the total tin in the sample tested and does not apportion the tin to one or the other side of the test specimen. The calculations appearing in Section 27 assume uniform distribution of tin over the two surfaces.  
This test method does not differentiate between free tin on the tinplate surface, tin combined with iron in the intermediate alloy layer, or tin alloyed with the steel as a residual tramp element.
SCOPE
1.1 These test methods include four methods for the determination of tin coating weights for electrolytic tin plate as follows:Test MethodSectionsA-Bendix Test Method3 to 9B-Constant-Current, Electrolytic Test Method (Referee Method)10 to 18C-Sellar's Test Method19 to 28D-Titration Test Method29 to 37
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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-Oct-2003
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.20 - Tin Mill Products

Relations

• Replaces: ASTM A630-98 - Standard Test Methods for Determination of Tin Coating Weights for Electrolytic Tin Plate
• Effective Date: 01-Nov-2003
• Replaced By: ASTM A630-03(2009) - Standard Test Methods for Determination of Tin Coating Weights for Electrolytic Tin Plate
• Effective Date: 01-Apr-2009
• Referred By: ASTM A624/A624M-22 - Standard Specification for Tin Mill Products, Electrolytic Tin Plate, Single Reduced
• Effective Date: 01-Nov-2003
• Referred By: ASTM A599/A599M-07(2017) - Standard Specification for Tin Mill Products, Electrolytic Tin-Coated, Cold-Rolled Sheet
• Effective Date: 01-Nov-2003
• Referred By: ASTM A626/A626M-22 - Standard Specification for Tin Mill Products, Electrolytic Tin Plate, Double Reduced
• Effective Date: 01-Nov-2003

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:A 630–03
Standard Test Methods for
Determination of Tin Coating Weights for Electrolytic Tin
1
Plate
This standard is issued under the fixed designation A 630; 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 standard has been approved for use by agencies of the Department of Defense.
INTRODUCTION
Four test methods for determination of tin coating weights are described.These are typical methods
and represent those most commonly used in the tin plate industry. Publication of these test methods
is not intended to preclude the use of any other methods such as X-ray fluorescence measurement
systems for control purposes by the consumer or supplier. However, in case of dispute, the referee
method is to be used to determine conformance to Specification A 624/A 624M and Specification
A 626/A 626M.
Sampling procedures for tin coating-weight testing and applicable standards for the specific class
designation are outlined in Specification A 624/A 624M and Specification A 626/A 626M.
1. Scope* A 599/A 599M Specification for Tin Mill Products, Elec-
trolytic Tin-Coated, Cold-Rolled Sheet
1.1 These test methods include four methods for the deter-
A 623 SpecificationforTinMillProducts,GeneralRequire-
mination of tin coating weights for electrolytic tin plate as
ments
follows:
A 623M Specification for Tin Mill Products, General Re-
Test Method Sections
quirements [Metric]
A—Bendix Test Method 3 to 9
B—Constant-Current, Electrolytic Test Method (Referee Method) 10 to 18
A 624/A 624M SpecificationforTinMillProducts,Electro-
C—Sellar’s Test Method 19 to 28
lytic Tin Plate, Single Reduced
D—Titration Test Method 29 to 37
A 626/A 626M SpecificationforTinMillProducts,Electro-
lytic Tin Plate, Double Reduced
1.2 The values stated in inch-pound units are to be regarded
D 1125 Test Methods for Electrical Conductivity and Re-
as the standard. The values given in parentheses are for
sistivity of Water
information only.
1.3 This standard does not purport to address all of the
METHOD A—DETERMINATION OF THE TIN
safety concerns, if any, associated with its use. It is the
COATING WEIGHTS BY THE BENDIX TEST
responsibility of the user of this standard to establish appro-
METHOD
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3. Scope
3.1 This test method covers the determination of tin coating
2. Referenced Documents
2
weights on steel plate.
2.1 ASTM Standards:
4. Summary of Test Method
1
These test methods are under the jurisdiction of ASTM Committee A01 on
4.1 The procedure involves dissolution of tin from a tin
Steel, Stainless Steel and Related Alloys and are the direct responsibility of
plate anode in a dilute hydrochloric acid solution containing a
Subcommittee A01.20 on Tin Plate.
measured excess of standard potassium iodate-potassium io-
Current edition approved November 1, 2003. Published January 2004. Originally
approved in 1968. Last previous edition approved in 1998 as A 630 - 98. dide solution. Excess iodine from the iodate-iodide solution is
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
back titrated with standard sodium thiosulfate using a starch
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
indicator.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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A630–03
3
5. Apparatus add 0.5 g of antimony and2gof high-purity aluminum. Heat
until the aluminum is completely dissolved and digest for an
5.1 The detinning cell consists essentially of two cathodes
additional 10 min. Cool the flask to room temperature in
of carbon rod, the sample that serves as an anode, and a beaker
running water while maintaining an atmosphere of CO .
2
of dilute hydrochloric acid electrolyte. The carbon rods (6 by
Disconnect from the CO system and titrate with the KIO -KI
2 3
0.25 in. or 152 by 6.35 mm, encased in porous porcelain
solution using starch as an indicator. Calculate the tin titer, T,
thimbles) are suspended from a suitable frame about 1 in. [25
as follows:
mm] apart. A small glass-enclosed magnet is attached to the
frame in such a manner that it will hold the sample suspended T 5 A/B
midway between the two cathodes. A movable platform per-
where:
mits the beaker of electrolyte to be brought up around the
A = tin used (0.2700 g),
...