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  • Title: Dissolution of stainless steel in artificial saliva.
    Author: Lakatos-Varsányi M, Wegrelius L, Olefjord I.
    Journal: Int J Oral Maxillofac Implants; 1997; 12(3):387-98. PubMed ID: 9197105.
    Abstract:
    Dissolution of stainless steel type 304 in artificial saliva was studied by electrochemical methods, electron spectroscopy for chemical analysis, and atom absorption spectroscopy. The samples were polarized in the -400 mV (saturated calomel electrode) to -50 mV (saturated calomel electrode) range. The total thickness of the passive film was found to be 25 +/- 3 A, independent of the potential. The passive film consists of a duplex structure: an inner layer of (Cr0.5Fe0.5)2O3 and an outer layer of a mixture of Cr(OH)3 and (CrxFey)PO4.2H2O. The analysis indicated that 11 micrograms/cm2 of the alloying elements were dissolved during exposure for 1 year.
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