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    STUDIA CHEMIA - Issue no. 1-2 / 2001  
         
  Article:   SOME TYPICAL CYCLIC VOLTAMOGRAMS OBTAINED FOR DENTAL ALLOYS IN SIMULATED HUMAN BODY FLUIDS.

Authors:  N. AELENEI, GH. NEMTOI, D. MARECI, DELIA AELENEI, CARMEN CHIPER, R. CHELARIU. 		 
       
         
  Abstract:  The existence of various classes of implant materials and metallic alloys used in dentistry, as well as the complex compositions of natural or simulated human body fluids, make possible to appear a very contrasting and complicated chemical and electrochemical behaviour. Among the experimental methods for studying the corrosion performances in simulated human body fluids, the potentiodynamic tests take up a special place, being very rapid and providing many informations about the electrochemical processes involved. A few cyclic voltamograms are presented and discussed, analyzing the main processes which characterize the electrochemical behaviour of the studied materials in various solutions, as: passivation by anodic oxidation (titanium and titanium alloys in acidic media and in Ringer type solutions), “pitting” type corrosion (Cu-Al-Fe and Ni-Cr-Fe alloys in artificial saliva), secondary anodic processes as insoluble salt formation (Cu-Al-Fe alloy in a complex sulfuric medium and allied titanium in Ringer solution).  
         
     
         
         
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