The mechanism of corrosion of palladium–silver binary alloys in artificial saliva

Sodium tetrachloropalladate for diagnosing palladium sensitization

“…This participant was male, did not wear jewellery, and did not have any piercings. It is of note that he had a great number of palladium–silver–copper dental restorations (data not given), which are notorious for their low electrochemical corrosion resistance (16, 17). Most likely, therefore, he had been sensitized at a subclinical level.…”

Corrosion behaviour of FePt-based bulk magnets in artificial saliva solution

“…Besides pure Fe and Pt (Goodfellow) other commercial dental alloys have been tested as reference materials: the ferritic steel Fe-30Cr-0.18Ni-2Mo-0.15Si-0.04Mn corresponding to the stainless steel SUS447J1, the spring steel Fe-18Cr-18Mn-2Mo-1N (Scheu-Dental GmbH, Germany) and two CoCr-alloys, 63Co-28.5Cr-6Mo-0.4Si-1W-0.6Mn-0.5C (CoCr dental alloy 1, hard) and 65Co-27Cr-6Mo-0.4Si-1W-0.6Mn-0.1C (CoCr dental alloy 2, soft) (both AZ&Partner, Switzerland). The test solution was an air-saturated artificial saliva solution at 37 • C with the following composition [12]: 20.1 mmol/l KCl, 17.9 mmol/l NaHCO 3 , 3.6 mmol/l NaH 2 PO 4 , 5.2 mmol/l KSCN, 0.1 mmol/l lactic acid, pH 6.8.…”

Palladium alloys for biomedical devices

“…Cu in Pd-based alloys appears to promote crevice corrosion [35], but even the most recent Pd-based alloys release limited amounts of Pd into artificial saliva [36]. A study of Pd-Ag binary alloys showed that Pd inhibits the corrosion of Ag via an enrichment of Pd at the surface post-Ag corrosion unless the abundance of Ag in the alloys reaches critical levels of approximately 50 at% [37]. Pd alloy corrosion has been investigated in several unique in vivo studies.…”