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.
Highlights
Dental materials are specially elaborated materials, designed for use in odontology, and are intended to be utilized in the oral cavity
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
This statement is based in the results of previous research where the corrosion properties of palladium–silver– copper alloys exposed to artificial saliva were investigated and the presence of copper oxides in the corroded surface was revealed by the surface analysis conducted by the XPS technique [13]
Summary
Dental materials are specially elaborated materials, designed for use in odontology, and are intended to be utilized in the oral cavity. Metals and alloys have many applications in odontology. Steel alloys are typically utilized for the elaboration of instruments and wires for orthodontics. The fundamental requirement of the dental material is that this kind of biomaterial and the human tissue coexist without unwanted effects on each other. This property or condition is known as biocompatibility which can be defined as the capability or ability of a material to perform with a suitable and appropriate host response in a specific application [1]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
