Performance Assessment of Magnesium Anodes Manufactured by Sintering Process

Metals

ErickA. Juárez-Arellano¹  Ruth López-Alcantara²  JudithA. Sanmiguel-May³  Tezozomoc Pérez-López³  Antonio Contreras⁴  JoséT. Pérez-Quiroz⁵ 

[1] Campus Tuxtepec, Circuito Central 200, Parque Industrial, Universidad del Papaloapan, San Juan Bautista Tuxtepec 68301, Mexico;Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Av. Agustín Melgar s/n, San Francisco de Campeche 24039, Campeche, Mexico;Centro de Investigación en Corrosión, Universidad Autónoma de Campeche, Av. Héroe de Nacozari 480, San Francisco de Campeche 24079, Campeche, Mexico;Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Norte 152, San Bartolo Atepehuacan, Ciudad de México 07730, Mexico;Instituto Mexicano del Transporte, Km. 12 + 000 Carretera Estatal No. 431 El Colorado—Galindo, San Fandila, Querétaro 76703, Mexico;

关键词: cathodic protection;    galvanic anodes;    Mg-alloys;    X52 steel;   

DOI  :  10.3390/met11030406

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown