Standard Specification for Magnesium Alloy Anodes for Cathodic Protection

SCOPE
1.1 This specification covers magnesium alloy anodes in the form of cast and extruded shapes.

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Historical
Publication Date
09-Apr-1998
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ASTM B843-93(1998) - Standard Specification for Magnesium Alloy Anodes for Cathodic Protection
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B 843 – 93 (Reapproved 1998)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Magnesium Alloy Anodes for Cathodic Protection
This standard is issued under the fixed designation B 843; 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.
1. Scope metal when the cast anode or extrusion ingot is poured, or from
the finished anode. Samples shall be representative of the
1.1 This specification covers magnesium alloy anodes in the
material.
form of cast and extruded shapes.
5.2.2 In case of dispute, the sample for chemical analysis
2. Referenced Documents shall meet the requirements of Practice E 55 or E 88.
5.2.3 Method of Analysis—Any suitable method of chemi-
2.1 ASTM Standards:
cal analysis may be used. In case of dispute, the analysis shall
E 35 Test Methods for Chemical Analysis of Magnesium
be made by methods given in Test Methods E 35.
and Magnesium Alloys
E 55 Practice for Sampling Wrought Nonferrous Metals and
6. Property Testing
Alloys for Determination of Chemical Composition
6.1 Sufficient samples may be taken for property testing as
E 88 Practice for Sampling Nonferrous Metals and Alloys
negotiated between purchaser and supplier. Testing will be
in Cast Form for Determination of Chemical Composition
done in compliance with Test Method G 97.
G 97 Test Method for Laboratory Evaluation of Magnesium
Sacrificial Anode Test Specimens for Underground Appli-
7. General Quality
cations
7.1 Magnesium cast and extruded anodes shall have a clean
3. Significance and Use surface and be commercially free of dirt, slag, or other foreign
material.
3.1 This specification is prescriptive and not performance in
nature.
8. Rejection
4. Ordering Information 8.1 Material that does not conform to the requirements of
this specification may be rejected, and if rejected, the condi-
4.1 Orders for anodes under this specification shall include
tions of replacement shall be as agreed upon between the
the following information:
purchaser and the supplier.
4.1.1 Grade (Section 5 and Table 1),
4.1.2 Quantity (number of pieces), and
9. Packaging and Package Marking
4.1.3 Size, form, and shape as negotiated between purchaser
9.1 The material shall be packaged in such a manner as to
and supplier.
prevent damage in ordinary handling and transportation. The
5. Chemical Composition type of packing and gross weight of the individual container
shall be left to the discretion of the supplier, unless otherwise
5.1 Limits—The material shall conform to the chemical
agreed upon between the purchaser and the supplier. Packing
composition requirements prescribed in Table 1.
m
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