Performance Assessment of Magnesium Anodes Manufactured by Sintering Process

This work shows the performance of cathodic protection systems formed by an API (American Petroleum Institute) X52 steel exposed to seawater and coupled with galvanic anodes of Mg, Mg-1Cr, and Mg-1Nb fabricate by sintering technique at a temperature of 500 °C. Potential monitoring indicates that X52...

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Bibliographic Details
Published in:Metals (Basel ) 2021-03, Vol.11 (3), p.406
Main Authors: Sanmiguel-May, Judith A., López-Alcantara, Ruth, Juárez-Arellano, Erick A., Pérez-Quiroz, José T., Contreras, Antonio, Pérez-López, Tezozomoc
Format: Article
Language:English
Subjects:
Alloys
Calomel electrode
Cathodic protection
Corrosion potential
Electrodes
Electrolytes
galvanic anodes
Hydrogen
Magnesium
Mg-alloys
Particle size
Performance assessment
Powder metallurgy
Protection systems
Sacrificial anodes
Seawater
Sintering
Steel
X52 steel
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Summary:This work shows the performance of cathodic protection systems formed by an API (American Petroleum Institute) X52 steel exposed to seawater and coupled with galvanic anodes of Mg, Mg-1Cr, and Mg-1Nb fabricate by sintering technique at a temperature of 500 °C. Potential monitoring indicates that X52 steel of the three systems remained in the protection zone. Mg-Nb/X52 system showed the more stable potentials since the first day; the recorded values remained between −1.0 and −1.1 V vs. SCE (saturated calomel electrode) during the seven days of exposure time. Current density records show that Mg/X52 system had the most stable values, while the other two systems (Mg-Cr/X52 Mg-Nb/X52,) had current fluctuations. The Mg-X52 system recorded the most negative potential values, which can be attributed to a greater magnitude and a better distribution of the cathodic protection current. However, the Mg-Nb/X52 system had a better result because the current drained by the system was constant throughout the experiment.
ISSN:2075-4701
2075-4701
DOI:10.3390/met11030406