ASTM B418-09
(Specification)Standard Specification for Cast and Wrought Galvanic Zinc Anodes
Standard Specification for Cast and Wrought Galvanic Zinc Anodes
ABSTRACT
This specification covers cast and wrought galvanic zin anodes used for the cathodic protection of more noble metals and alloys in sea water, brackish water, other saline electrolytes, or other corrosive environments. The anodes shall undergo chemical analysis and spectrochemical analysis and shall conform to the required chemical compositions of aluminum, cadmium, iron, lead, copper, and zinc.
SCOPE
1.1 This specification covers cast and wrought galvanic zinc anodes used for the cathodic protection of more noble metals and alloys in sea water, brackish water, other saline electrolytes, or other corrosive environments.
1.2 Type I anodes are most commonly used for such applications. The Type I anode composition in this specification meets the chemical composition requirements of MIL-A-18001K.
1.3 Zinc anodes conforming to this specification may be used in other waters, electrolytes, backfills, and soils where experience has shown that the specified composition is efficient and reliable. Type II anodes are most commonly used for such applications.
1.4 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.
1.5 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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
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Designation: B418 – 09
Standard Specification for
1
Cast and Wrought Galvanic Zinc Anodes
This standard is issued under the fixed designation B418; 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.
1. Scope* Determine Conformance with Specifications
E527 Practice for Numbering Metals and Alloys in the
1.1 This specification covers cast and wrought galvanic zinc
Unified Numbering System (UNS)
anodes used for the cathodic protection of more noble metals
E536 Test Methods for ChemicalAnalysis of Zinc and Zinc
and alloys in sea water, brackish water, other saline electro-
Alloys
lytes, or other corrosive environments.
3
2.2 Military Standard:
1.2 Type I anodes are most commonly used for such
MIL-A-18001K w/INT. AMENDMENT 3, 24 October
applications. The Type I anode composition in this specifica-
2007 MilitarySpecificationAnodesSacrificialZincAlloy
tion meets the chemical composition requirements of MIL-A-
4
2.3 ISO Standards:
18001K.
ISO 3815-1 Zincandzincalloys—Part1:Analysisofsolid
1.3 Zinc anodes conforming to this specification may be
samples by optical emission spectrometry
used in other waters, electrolytes, backfills, and soils where
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by
experiencehasshownthatthespecifiedcompositionisefficient
inductively coupled plasma optical emission spectrometry
and reliable. Type II anodes are most commonly used for such
applications.
3. Terminology
1.4 The values stated in inch-pound units are to be regarded
3.1 Terms shall be defined in accordance with Terminology
as standard. The values given in parentheses are mathematical
B899.
conversions to SI units that are provided for information only
3.2 Definitions of Terms Specific to This Standard:
and are not considered standard.
3.2.1 cathodic protection, n—reduction of corrosion by
1.5 This standard does not purport to address all of the
making the protected metal the cathode in a conducting
safety concerns, if any, associated with its use. It is the
medium by applying direct current.
responsibility of the user of this standard to become familiar
3.2.2 galvanic anode, n—a metal electrode that sacrificially
with all hazards including those identified in the appropriate
corrodes when coupled to a more noble metal in a conducting
Material Safety Data Sheet (MSDS) for this product/material
medium, and thereby supplies a protective electric current to
as provided by the manufacturer, to establish appropriate
the noble electrode.
safety and health practices, and determine the applicability of
3.2.3 ribbon anode, n—a long, continuous sacrificial anode
regulatory limitations prior to use.
shape, with a diamond, square, rectangular, oval, or other
2. Referenced Documents cross-section, most commonly made of zinc, magnesium or
2
aluminum, having a core wire normally made of steel, that is
2.1 ASTM Standards:
usually supplied in coils or reels of 100 to 3600 ft depending
B6 Specification for Zinc
upon size and cross-section.
B899 Terminology Relating to Non-ferrous Metals and
3.2.4 saline electrolyte, n—a solution consisting of mainly
Alloys
the chlorides of the alkali metals.
E29 Practice for Using Significant Digits in Test Data to
4. Ordering Information
4.1 Orders for anodes under this specification shall include
1
This specification is under the jurisdiction of ASTM Committee B02 on
the following information:
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
4.1.1 ASTM designation and year of issue,
B02.04 on Zinc and Cadmium.
Current edition approved Oct. 1, 2009. Published October 2009. Originally
approved in 1964. Last previous edition approved in 2008 as B418 – 08. DOI:
3
10.1520/B0418-09. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.dodssp.daps.mil.
4
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*ASummary 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
---------------------- Page: 1 ----------------------
B418 – 09
TABLE 2 Methods of Analysis
4.1.2 Type of anode material (see Ta
...
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:B418–08 Designation: B418 – 09
Standard Specification for
1
Cast and Wrought Galvanic Zinc Anodes
This standard is issued under the fixed designation B418; 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.
1. Scope*
1.1 This specification covers cast and wrought galvanic zinc anodes used for the cathodic protection of more noble metals and
alloys in sea water, brackish water, other saline electrolytes, or other corrosive environments.
1.2 Type I anodes are most commonly used for such applications. The Type I anode composition in this specification meets the
chemical composition requirements of MIL-A-18001JK.
1.3 Zinc anodes conforming to this specification may be used in other waters, electrolytes, backfills, and soils where experience
has shown that the specified composition is efficient and reliable. Type II anodes are most commonly used for such applications.
1.4 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.
1.5 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 become familiar with all hazards including those identified in the appropriate Material Safety Data
Sheet (MSDS) for this product/material as provided by the manufacturer, 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:
B6 Specification for Zinc
B899 Terminology Relating to Non-ferrous Metals and Alloys
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys
3
2.2 Military Standard:
MIL-A-18001JMilitary SpecificationAnodes, Corrosion Preventative, Zinc, Slab Disc, and Rod Shaped MIL-A-18001K w/INT.
AMENDMENT 3, 24 October 2007 Military Specification Anodes Sacrificial Zinc Alloy
4
2.3 ISO Standards:
ISO 3815-1 Zinc and zinc alloys — Part 1: Analysis of solid samples by optical emission spectrometry
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by inductively coupled plasma optical emission spectrometry
3. Terminology
3.1 Terms shall be defined in accordance with Terminology B899.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 cathodic protection, n—reduction of corrosion by making the protected metal the cathode in a conducting medium by
applying direct current.
3.2.2 galvanic anode, n—a metal electrode that sacrificially corrodes when coupled to a more noble metal in a conducting
medium, and thereby supplies a protective electric current to the noble electrode.
1
This specification is under the jurisdiction ofASTM Committee B02 on Nonferrous Metals andAlloys and is the direct responsibility of Subcommittee B02.04 on Zinc
and Cadmium.
Current edition approved Nov.Oct. 1, 2008.2009. Published December 2008.October 2009. Originally approved in 1964. Last previous edition approved in 20062008 as
B418 – 068. DOI: 10.1520/B0418-089.
2
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*ASummary 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
...
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