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Title: Performance Of High Potential Magnesium Anodes: Its Not All Good
Author: Mark Yunovich
Source: American Gas Association 2005
Year Published: 2005
Abstract: Magnesium anodes are provided to the corrosion control industry by a number of domestic and international manufacturers and distributors. Due to the difficulty and time involved in performance testing, anode composition is commonly the only criterion used for quality control by the end users. However, experience has shown that compliance of the anode chemical composition with the ASTM B843 Standard Specification for Magnesium Alloy Anodes for Cathodic Protection can be misleading and does not always differentiate between the anodes of different quality. It has been shown that anodes that pass both chemical composition requirements and a simple anode potential test can have a wide range of efficiencies based on the ASTM G97 Standard Test Method for Laboratory Evaluation of Magnesium Sacrificial Anode Test Specimens for Underground Applications.

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