title: Effect of Ag Addition on the Electrochemical Performance of Cu10Al in Artificial Saliva.
abstract: In this work we proposed to evaluate the corrosion resistance of four different alloys by electrochemical techniques, a binary alloy Cu10Al, and three ternary alloys Cu10Al-xAg (x = 5, 10, and 15 wt.%) to be used like biomaterials in dental application. Biomaterials proposed were tested in artificial saliva at 37°C for 48 h. In addition, pure metals Cu, Al, Ag, and Ti as reference materials were evaluated. In general the short time tests indicated that the Ag addition increases the corrosion resistance and reduces the extent of localized attack of the binary alloy. Moreover, tests for 48 hours showed that the Ag addition increases the stability of the passive layer, thereby reducing the corrosion rate of the binary alloy. SEM analysis showed that Cu10Al alloy was preferably corroded by grain boundaries, and the Ag addition modified the form of attack of the binary alloy. Cu-rich phases reacted with SCN(-) anions forming a film of CuSCN, and the Ag-rich phase is prone to react with SCN(-) anions forming AgSCN. Thus, binary and ternary alloys are susceptible to tarnish in the presence of thiocyanate ions.
authors.affiliation: Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, MOR, Mexico.
authors.forename: R J
authors.initials: RJ
authors.lastname: Salgado-Salgado
authors.affiliation: CIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, MOR, Mexico; Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Avenida Universidad s/n, 62210 Cuernavaca, MOR, Mexico.
authors.forename: J
authors.identifier: 0000-0002-6943-3926
authors.initials: J
authors.lastname: Porcayo-Calderon
authors.affiliation: Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Avenida Universidad s/n, 62210 Cuernavaca, MOR, Mexico.
authors.forename: O
authors.initials: O
authors.lastname: Sotelo-Mazon
authors.affiliation: Universidad Politécnica del Estado de Morelos, Boulevard Cuauhnahuac 566, Col. Lomas del Texcal, 62574 Jiutepec, Morelos, Mexico.
authors.forename: R A
authors.initials: RA
authors.lastname: Rodriguez-Diaz
authors.affiliation: Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Avenida Universidad s/n, 62210 Cuernavaca, MOR, Mexico.
authors.forename: G
authors.initials: G
authors.lastname: Salinas-Solano
authors.affiliation: Instituto de Investigaciones Eléctricas, Avenida Reforma 113, Colonia Palmira, 62490 Cuernavaca, MOR, Mexico.
authors.forename: V M
authors.identifier: 0000-0002-7021-8190
authors.initials: VM
authors.lastname: Salinas-Bravo
authors.affiliation: CIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, MOR, Mexico; Corrosion y Protección (CyP), Buffon 46, 11590 México City, DF, Mexico.
authors.forename: L
authors.identifier: 0000-0003-3227-0067
authors.initials: L
authors.lastname: Martinez-Gomez