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Effect of silver on electrochemical properties of cu10al in artificial saliva

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Document pages: 11 pages

Abstract: In this work, we propose to evaluate the corrosion resistance of four different alloys by electrochemical technology. One is binary alloy cu10al and the other is ternary alloy cu10al Ag (= 5, 10 and 15)   weight ) which is used as biomaterials in dental applications. The proposed biomaterial was tested in artificial saliva at 37 ° C for 48 hours   h. In addition, pure metals copper, aluminum, silver and titanium were evaluated as reference materials. In general, short-term tests show that the addition of silver can improve the corrosion resistance of binary alloys and reduce the degree of local corrosion. In addition, the 48 hour test shows that the addition of silver increases the stability of the passivation layer and reduces the corrosion rate of the binary alloy. SEM analysis shows that cu10al alloy has good grain corrosionboundaries, 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.

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