ASTM B418-16a

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 Safety Data Sheet (SDS) 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.

General Information

• Status: Historical
• Publication Date: 30-Sep-2016
• ICS: 25.220.01 - Surface treatment and coating in general
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.04 - Zinc and Cadmium

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:B418 −16a
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.
1. Scope* B949 Specification for General Requirements for Zinc and
Zinc Alloy Products
1.1 This specification covers cast and wrought galvanic zinc
E29 Practice for Using Significant Digits in Test Data to
anodes used for the cathodic protection of more noble metals
Determine Conformance with Specifications
and alloys in sea water, brackish water, other saline
E527 Practice for Numbering Metals and Alloys in the
electrolytes, or other corrosive environments.
Unified Numbering System (UNS)
1.2 Type I anodes are most commonly used for such
E536 Test Methods for Chemical Analysis of Zinc and Zinc
applications. The Type I anode composition in this specifica-
Alloys
tion meets the chemical composition requirements of MIL-A- 3
2.2 Military Standard:
18001K.
MIL-A-18001K w/INT. AMENDMENT 3, 24 October
1.3 Zinc anodes conforming to this specification may be 2007 Military SpecificationAnodes Sacrificial ZincAlloy
4
used in other waters, electrolytes, backfills, and soils where 2.3 ISO Standards:
experiencehasshownthatthespecifiedcompositionisefficient
ISO 3815-1 Zinc and zinc alloys — Part 1:Analysis of solid
and reliable. Type II anodes are most commonly used for such samples by optical emission spectrometry
applications.
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by
inductively coupled plasma optical emission spectrometry
1.4 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
3. Terminology
conversions to SI units that are provided for information only
3.1 Terms shall be defined in accordance with Terminology
and are not considered standard.
B899.
1.5 This standard does not purport to address all of the
3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.2.1 cathodic protection, n—reduction of corrosion by
responsibility of the user of this standard to become familiar
making the protected metal the cathode in a conducting
with all hazards including those identified in the appropriate
medium by applying direct current.
Safety Data Sheet (SDS) for this product/material as provided
by the manufacturer, to establish appropriate safety and health
3.2.2 galvanic anode, n—a metal electrode that sacrificially
practices, and determine the applicability of regulatory limi-
corrodes when coupled to a more noble metal in a conducting
tations prior to use.
medium, and thereby supplies a protective electric current to
the noble electrode.
2. Referenced Documents
3.2.3 saline electrolyte, n—a solution consisting of mainly
2
2.1 ASTM Standards:
the chlorides of the alkali metals.
B6 Specification for Zinc
4. Ordering Information
B899 Terminology Relating to Non-ferrous Metals and Al-
loys
4.1 Orders for zinc anodes under this specification shall
include information as specified in Specification B949.
4.2 Additional ordering information specific to this standard
1
This specification is under the jurisdiction of ASTM Committee B02 on
is as follows:
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
4.2.1 Type of anode material (see Table 1),
B02.04 on Zinc and Cadmium.
4.2.2 Number of anodes,
Current edition approved Oct. 1, 2016. Published November 2016. Originally
approved in 1964. Last previous edition approved in 2016 as B418 – 16. DOI:
10.1520/B0418-16a.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Philadelphia, PA 19111-5094, http://quicksearch.dla.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.
*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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B418−16a
A
TABLE 1 Chemical Requirements
Iron, Lead, Copper, Others,
C
Zinc ,
B
Type (UNS) Aluminum, % Cadmium, % max, max, max, Total,
%
% % % %
Type I (Z32120) 0.1–0.5 0.025–0.07 0.005 0.006 0.005 0.1 remainder
Type II (Z13000) 0.005 max 0.003 max 0.0014 0.003 0.002 . remainder
A
The following applies
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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 − 16 B418 − 16a
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.
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-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 Safety Data Sheet
(SDS) 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
B949 Specification for General Requirements for Zinc and Zinc Alloy Products
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-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 of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.04 on Zinc
and Cadmium.
Current edition approved May 1, 2016Oct. 1, 2016. Published July 2016November 2016. Originally approved in 1964. Last previous edition approved in 20122016 as
B418 – 12.B418 – 16. DOI: 10.1520/B0418-16.10.1520/B0418-16a.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from DLA Document Services, Building 4/D, 700 Robbins Ave., Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*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

---------------------- Page: 1 ----------------------
B418 − 16a
3.2.3 ribbon anode, n—a long, continuous sacrificial anode shape, with a diamond, square, rectangular, oval, or other
cross-section, most commonly made of zinc, magnesium or aluminum, having a core wire normally made of steel, that is usually
supplied in coils or reels of 100 to 3600 ft depending upon size and cross-sectio
...