ASTM-G97 2022

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G97-18(2022) Standard Test Method for Laboratory Evaluation of Magnesium Sacrificial Anode Test Specimens for Underground Applications

Published By	Publication Date	Number of Pages
ASTM	2022

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Categories: 77.040.99 - Other methods of testing of metals, ASTM

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Description

ASTM G97-18-Reapproved2022

Active 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 G193 for terms used in this test method.

1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautions, See Section 8 and Paragraph 9.1.1.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

coulometer; electroplater’s tape; sacrificial anode;

ICS Code

ICS Number Code 77.040.99 (Other methods of testing of metals)

DOI: 10.1520/G0097-18R22

Additional information

Standard Title	G97-18(2022) Standard Test Method for Laboratory Evaluation of Magnesium Sacrificial Anode Test Specimens for Underground Applications
Published Code	ASTM
Publication Date	2022
ICS Codes	77.040.99 - Other methods of testing of metals