ASTM A630-03(2009)
(Test Method)Standard Test Methods for Determination of Tin Coating Weights for Electrolytic Tin Plate
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 Method
Sections
A—Bendix Test Method
3 to 9
B—Constant-Current, Electrolytic Test Method (Referee Method)
10 to 18
C—Sellar's Test Method
19 to 28
D—Titration Test Method
29 to 37
1.2 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.
1.3 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.
3.1 This test method covers the determination of tin coating weights on steel plate.
10.1 This test method may be used to determine not only the total tin coating weight but also to determine that part of the tin coating which is present as free tin and that part which is present in the alloyed form.
19.1 This test method covers the determination of the total weight of tin carried by a unit area of tinplate.
29.1 This test method is normally applicable to the determination of tin coating weights in the range of 0.50 to 1.50 lb of tin/bb.
Note 4—For the determination of the coating weights outside of this range, an iodate solution of appropriate concentration should be prepared so that suitable titrant volumes are obtained. For the determination of low tin coating mass in the range from 0.05–0.49 lb/bb, the number of sample specimens should be adjusted appropriately to maintain a minimum total tin mass equivalent to that present on a 0.50 lb/bb specimen. This test method cannot be used to test single spot tin mass for low tin coating material.
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Designation: A630 − 03(Reapproved 2009)
Standard Test Methods for
Determination of Tin Coating Weights for Electrolytic Tin
1
Plate
This standard is issued under the fixed designation A630; 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.
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 A624/A624M and Specification
A626/A626M.
Sampling procedures for tin coating-weight testing and applicable standards for the specific class
designation are outlined in Specification A624/A624M and Specification A626/A626M.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 These test methods include four methods for the deter-
A599/A599M Specification for Tin Mill Products, Electro-
mination of tin coating weights for electrolytic tin plate as
lytic Tin-Coated, Cold-Rolled Sheet
follows:
A623 Specification for Tin Mill Products, General Require-
Test Method Sections
A—Bendix Test Method 3 to 9 ments
B—Constant-Current, Electrolytic Test Method (Referee Method) 10 to 18
A623M Specification for Tin Mill Products, General Re-
C—Sellar’s Test Method 19 to 28
quirements [Metric]
D—Titration Test Method 29 to 37
A624/A624M Specification for Tin Mill Products, Electro-
lytic Tin Plate, Single Reduced
1.2 The values stated in inch-pound units are to be regarded
A626/A626M Specification for Tin Mill Products, Electro-
as standard. The values given in parentheses are mathematical
lytic Tin Plate, Double Reduced
conversions to SI units that are provided for information only
D1125 Test Methods for Electrical Conductivity and Resis-
and are not considered standard.
tivity of Water
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
METHOD A—DETERMINATION OF THE TIN
responsibility of the user of this standard to establish appro-
COATING WEIGHTS BY THE BENDIX TEST
priate safety and health practices and determine the applica-
METHOD
bility of regulatory limitations prior to use.
3. Scope
3.1 This test method covers the determination of tin coating
weights on steel plate.
1
These test methods are under the jurisdiction of ASTM Committee A01 on
Steel, Stainless Steel and Related Alloysand are the direct responsibility of
2
Subcommittee A01.20 on Tin Mill Products. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2009. Published April 2009. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1968. Last previous edition approved in 2003 as A630 - 03. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/A0630-03R09. 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
1
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A630 − 03 (2009)
4. Summary of Test Method 6.3 Hydrochloric Acid (1.7 to 2.0 N)—Add 1 part of
concentrated hydrochloric acid (HCl, sp gr 1.19, 36.5 to
4.1 The procedure involves dissolution of tin from a tin
38.0%) to 5 parts of water and mix well.
plate anode in a dilute hydrochloric acid solution containing a
6.4 Potassium Iodate-Potassium Iodide, Standard Solution
measured excess of standard potassium iodate-potassium io-
(0.0975 N)—Dissolve 3.48 g of KIO , 21.74 g of KI, and 1.21
dide solution. Excess iodine from the iodate-iodide solution is
3
g of NaOH in 1 L of distilled water. Standardize as follows:
back titrated with standard sodium thiosulfate using a starch
Transfer 0.2700 g of National Bureau of Standards tin to a
indicator.
500-mLErlenmeyer flask.Add 200 mLof HCl (1+1). Connect
3
the flask to a carbon dioxide (CO ) system and displace the air
5. Apparatus
2
in the flask with CO . While continuing the flow of CO , heat
2 2
5.1 The detinning cell consists essentially of two cathodes
the flask but do not boil violently. After the tin has dissolved
of carbon rod, the sample that serves as an anode, and a beaker
add 0.5 g of antimony and2gof high-purity aluminum. Heat
of di
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:A 630–98 Designation:A 630–03 (Reapproved 2009)
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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) 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
Fourtestmethodsfordeterminationoftincoatingweightsaredescribed.Thesearetypicalmethods
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 A624/A624M and Specification
A626/A626M.
Sampling procedures for tin coating-weight testing and applicable standards for the specific class
designation are outlined in Specification A624/A624M and Specification A626/A626M.
1. Scope
1.1 These test methods include four methods for the determination of tin coating weights for electrolytic tin plate as follows:
Test Method Sections
A—Bendix Test Method 3to9
B—Constant-Current, Electrolytic Test Method (Referee Method) 10 to 18
C—Sellar’s Test Method 19 to 28
D—Titration Test Method 29 to 37
1.2The values stated in inch-pound units are to be regarded as the standard.The values given in parentheses are for information
only.
1.2 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.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A599/A599M Specification for Tin Mill Products, Electrolytic Tin-Coated, Cold-Rolled Sheet
A623 Specification for Tin Mill Products, General Requirements
2
A623M Specification for Tin Mill Products, General Requirements (Metric) [Metric]
A624/A624M Specification for Tin Mill Products, Electrolytic Tin Plate, Single Reduced
A626/A626M Specification for Tin Mill Products, Electrolytic Tin Plate, Double Reduced
D1125 Test Methods for Electrical Conductivity and Resistivity of Water
1
These test methods are under the jurisdiction of ASTM Committee A-1A01 on Steel, Stainless Steel and Related Alloys,Alloys and are the direct responsibility of
Subcommittee A01.20 on Tin Plate.
Current edition approved March 10, 1998. Published November 1998. Originally published asA630–68. Last previous editionA630–91 (Reapproved 1997). on Tin Mill
Products.
Current edition approved April 1, 2009. Published April 2009. Originally approved in 1968. Last previous edition approved in 2003 as A630-03.
2
Annual Book of ASTM Standards, Vol 01.06.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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A 630–03 (2009)
METHOD A—DETERMINATION OF THE TIN COATING WEIGHTS BY THE BENDIX TEST METHOD
3. Scope
3.1 This test method covers the determination of tin coating weights on steel plate.
4. Summary of Test Method
4.1 Theprocedureinvolvesdissolutionoftinfromatinplateanodeinadilutehydrochloricacidsolutioncontainingameasured
excess of standard potassium iodate-potassium iodide solution. Excess iodine from the iodate-iodide solution is back titrated with
standard sodium thiosulfate using a starch indicator.
3
5. Apparatus
5.1 The detinning cell consists essentially of two cathodes of carbon rod, the sample that serves as an anode, and a beaker of
dilute hydrochloric acid electrolyte.The carbon rods (6 by 0.25 in. or 152 by 6.35 mm, encased in porous porcelain thimbles) are
suspended from a suitable frame about 1 in. (25 mm) apart. A small glass-e
...
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