ASTM-G97 2007

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G97-97(2007) Standard Test Method for Laboratory Evaluation of Magnesium Sacrificial Anode Test Specimens for Underground Applications

Published By	Publication Date	Number of Pages
ASTM	2007	4

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Categories: 77.150.20 - Magnesium products, ASTM

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Description

ASTM G97-97-Reapproved2007

Historical Standard: Standard Test Method for Laboratory Evaluation of Magnesium Sacrificial Anode Test Specimens for Underground Applications

ASTM G97

Scope

1.1 This test method covers a laboratory procedure that measures the two fundamental performance properties of magnesium sacrificial anode test specimens operating in a saturated calcium sulfate, saturated magnesium hydroxide environment. The two fundamental properties are electrode (oxidation potential) and ampere hours (Ah) obtained per unit mass of specimen consumed. Magnesium anodes installed underground are usually surrounded by a backfill material that typically consists of 75 % gypsum (CaSO₄·2H₂O), 20 % bentonite clay, and 5 % sodium sulfate (Na₂SO₄). The calcium sulfate, magnesium hydroxide test electrolyte simulates the long term environment around an anode installed in the gypsum-bentonite-sodium sulfate backfill.

1.2 This test method is intended to be used for quality assurance by anode manufacturers or anode users. However, long term field performance properties may not be identical to property measurements obtained using this laboratory test.

Note 1—Refer to Terminology G 15 for terms used in this test method.

1.3 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautions, See Section 7 and Paragraph 8.1.1.

Keywords

coulometer; electroplater’s tape; sacrificial anode; Ampere hours; Anodes; Backfill–testing; Corrosion; Current measurement; Electrodes; Laboratory analysis/evaluation; Magnesium; Magnesium anodes; Oxidation testing; Performance–metals/alloys materials/applications; Saturated calcium sulfate/magnesium hydroxide environments; Underground environments

ICS Code

ICS Number Code 77.150.20 (Magnesium products)

DOI: 10.1520/G0097-97R07

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Summary of Test Method Significance and Use Apparatus
2	Reagents Precautions Specimen Preparation FIG. 1 FIG. 2 FIG. 3
3	FIG. 4
4	Precision and Bias Keywords

Additional information

Standard Title	G97-97(2007) Standard Test Method for Laboratory Evaluation of Magnesium Sacrificial Anode Test Specimens for Underground Applications
Published Code	ASTM
Publication Date	2007
Pages Count	4
ICS Codes	77.150.20 - Magnesium products