ASTM B843-93(2003)
(Specification)Standard Specification for Magnesium Alloy Anodes for Cathodic Protection
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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Standards Content (Sample)
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Designation: B 843 – 93 (Reapproved 2003)
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 5.2.2 In case of dispute, the sample for chemical analysis
shall meet the requirements of Practice E 55 or E 88.
1.1 This specification covers magnesium alloy anodes in the
5.2.3 Method of Analysis—Any suitable method of chemi-
form of cast and extruded shapes.
cal analysis may be used. In case of dispute, the analysis shall
2. Referenced Documents
be made by methods given in Test Methods E 35.
2.1 ASTM Standards:
6. Property Testing
E 35 Test Methods for Chemical Analysis of Magnesium
6.1 Sufficient samples may be taken for property testing as
and Magnesium Alloys
negotiated between purchaser and supplier. Testing will be
E 55 Practice for SamplingWrought Nonferrous Metals and
done in compliance with Test Method G 97.
Alloys for Determination of Chemical Composition
E 88 Practice for Sampling Nonferrous Metals and Alloys
7. General Quality
in Cast Form for Determination of Chemical Composition
7.1 Magnesium cast and extruded anodes shall have a clean
G 97 Test Method for Laboratory Evaluation of Magnesium
surface and be commercially free of dirt, slag, or other foreign
Sacrificial Anode Test Specimens for Underground Appli-
3 material.
cations
8. Rejection
3. Significance and Use
8.1 Material that does not conform to the requirements of
3.1 This specification is prescriptive and not performance in
this specification may be rejected, and if rejected, the condi-
nature.
tions of replacement shall be as agreed upon between the
4. Ordering Information purchaser and the supplier.
4.1 Orders for anodes under this specification shall include
9. Packaging and Package Marking
the following information:
9.1 The material shall be packaged in such a manner as to
4.1.1 Grade (Section 5 and Table 1),
prevent damage in ordinary handling and transportation. The
4.1.2 Quantity (number of pieces), and
type of packing and gross weight of the individual container
4.1.3 Size, form, and shape as negotiated between purchaser
shall be left to the discretion of the supplier, unless otherwise
and supplier.
agreed upon between the purchaser and the supplier. Packing
5. Chemical Composition methods and containers shall be so selected as to permit
maximum utility of mechanical equipment in unloading and
5.1 Limits—The material shall conform to the chemical
subsequent handling.
composition requirements prescribed in Table 1.
9.2 Packages or containers shall be such as to ensure
5.2 Sampling:
acceptance by common or other carriers for safe transportation
5.2.1 Sufficient samples shall be taken by the manufacturer
at the lowest rate to the
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