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ASTM B843-07

(Specification)

Standard Specification for Magnesium Alloy Anodes for Cathodic Protection

Standard Specification for Magnesium Alloy Anodes for Cathodic Protection

ABSTRACT
This specification covers the standard requirements for magnesium alloy anodes in the form of cast and extruded shapes for use in cathodic protection. Materials shall adhere to specified chemical composition requirements, the samples for analysis of which shall be taken either from the molten metal when the cast anode or extrusion ingot is poured, or from the finished anode. Anodes shall have a clean surface and be commercially free of dirt, slag, or other foreign material.
SCOPE
1.1 This specification covers magnesium alloy anodes in the form of cast and extruded shapes.

General Information

Status
Historical
Publication Date
31-May-2007
ICS
77.150.20 - Magnesium products
Technical Committee
B07 - Light Metals and Alloys
Drafting Committee
B07.04 - Magnesium Alloy Cast and Wrought Products
Current Stage
Ref Project

Relations

Replaces
ASTM B843-93(2003) - Standard Specification for Magnesium Alloy Anodes for Cathodic Protection
Effective Date
01-Jun-2007
Referred By
ASTM B951-11(2018) - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
Effective Date
01-Jun-2007

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ASTM B843-07 - Standard Specification for Magnesium Alloy Anodes for Cathodic ProtectionASTM B843-07 - Standard Specification for Magnesium Alloy Anodes for Cathodic Protection
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ASTM B843-07 - Standard Specification for Magnesium Alloy Anodes for Cathodic Protection
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:B843 −07
StandardSpecification for
1
Magnesium Alloy Anodes for Cathodic Protection
This standard is issued under the fixed designation B843; 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 5. Chemical Composition
1.1 This specification covers magnesium alloy anodes in the
5.1 Limits—The material shall conform to the chemical
form of cast and extruded shapes.
composition requirements prescribed in Table 1.
5.2 Sampling:
2. Referenced Documents
5.2.1 Sufficient samples shall be taken by the manufacturer
2
2.1 ASTM Standards:
to ensure conformance to the chemical composition require-
B951 PracticeforCodificationofUnalloyedMagnesiumand
ments of the metal. Samples may be taken from the molten
Magnesium-Alloys, Cast and Wrought
metal when the cast anode or extrusion ingot is poured, or from
E35 Test Methods for ChemicalAnalysis of Magnesium and
the finished anode. Samples shall be representative of the
3
Magnesium Alloys (Withdrawn 2008)
material.
E55 Practice for Sampling Wrought Nonferrous Metals and
5.2.2 In case of dispute, the sample for chemical analysis
Alloys for Determination of Chemical Composition
shall meet the requirements of Practice E55 or E88.
E88 Practice for Sampling Nonferrous Metals and Alloys in
5.2.3 MethodofAnalysis—Anysuitablemethodofchemical
Cast Form for Determination of Chemical Composition
analysis may be used. In case of dispute, the analysis shall be
G97 Test Method for Laboratory Evaluation of Magnesium
made by methods given in Test Methods E35.
SacrificialAnode Test Specimens for UndergroundAppli-
cations
6. Property Testing
E527 Practice for Numbering Metals and Alloys in the
Unified Numbering System (UNS)
6.1 Sufficient samples may be taken for property testing as
negotiated between purchaser and supplier. Testing will be
3. Significance and Use
done in compliance with Test Method G97.
3.1 This specification is prescriptive and not performance in
7. General Quality
nature.
7.1 Magnesium cast and extruded anodes shall have a clean
4. Ordering Information
surface and be commercially free of dirt, slag, or other foreign
material.
4.1 Orders for anodes under this specification shall include
the following information:
8. Rejection
4.1.1 Grade (Section 5 and Table 1),
4.1.2 Quantity (number of pieces), and
8.1 Material that does not conform to the requirements of
4.1.3 Size, form, and shape as negotiated between purchaser
this specification may be rejected, and if rejected, the condi-
and supplier.
tions of replacement shall be as agreed upon between the
purchaser and the supplier.
1
This specification is under the jurisdiction of ASTM Committee B07 on Light
9. Packaging and Package Marking
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
Magnesium Alloy Cast and Wrought Products.
9.1 The material shall be packaged in such a manner as to
CurrenteditionapprovedJune1,2007.PublishedJuly2007.Originallyapproved
prevent damage in ordinary handling and transportation. The
in 1993. Last previous edition approved in 2003 as B843 – 93(2003). DOI:
type of packing and gross weight of the individual container
10.1520/B0843-07.
2
shall be left to the d
...

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