Performance Assessment of Magnesium Anodes Manufactured by Sintering Process
Judith A. Sanmiguel-May,
Ruth López-Alcantara,
Erick A. Juárez-Arellano,
José T. Pérez-Quiroz,
Antonio Contreras,
Tezozomoc Pérez-López
Affiliations
Judith A. Sanmiguel-May
Centro de Investigación en Corrosión, Universidad Autónoma de Campeche, Av. Héroe de Nacozari 480, San Francisco de Campeche, Campeche 24079, Mexico
Ruth López-Alcantara
Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Av. Agustín Melgar s/n, San Francisco de Campeche, Campeche 24039, Mexico
Erick A. Juárez-Arellano
Instituto de Química Aplicada, Universidad del Papaloapan, Campus Tuxtepec, Circuito Central 200, Parque Industrial, San Juan Bautista Tuxtepec 68301, Mexico
José T. Pérez-Quiroz
Instituto Mexicano del Transporte, Km. 12 + 000 Carretera estatal No. 431 El Colorado—Galindo, San Fandila, Querétaro 76703, Mexico
Antonio Contreras
Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Norte 152, San Bartolo Atepehuacan, Ciudad de México 07730, Mexico
Tezozomoc Pérez-López
Centro de Investigación en Corrosión, Universidad Autónoma de Campeche, Av. Héroe de Nacozari 480, San Francisco de Campeche, Campeche 24079, Mexico
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.
