title: Dissolution of stainless steel in artificial saliva.
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.
authors.affiliation: Department of Physical Chemistry, Eötoös Loránd University, Budapest, Hungary.
authors.forename: M
authors.initials: M
authors.lastname: Lakatos-Varsányi
authors.forename: L
authors.initials: L
authors.lastname: Wegrelius
authors.forename: I
authors.initials: I
authors.lastname: Olefjord
mesh_terms: D017608:Chromium Compounds / Q000032:analysis; D003343:Corrosion; D004563:Electrochemistry; D004566:Electrodes; D006878:Hydroxides / Q000032:analysis; D058085:Iron Compounds / Q000032:analysis; D008628:Mercury; D017669:Mercury Compounds; D010087:Oxides / Q000032:analysis; D010710:Phosphates / Q000032:analysis; D012464:Saliva, Artificial / Q000737:chemistry*; D012995:Solubility; D013054:Spectrophotometry, Atomic; D013057:Spectrum Analysis; D013193:Stainless Steel / Q000032:analysis / Q000737:chemistry*; D013997:Time Factors
chemical_list: D017608:Chromium Compounds; D006878:Hydroxides; D058085:Iron Compounds; D017669:Mercury Compounds; D010087:Oxides; D010710:Phosphates; D012464:Saliva, Artificial; D013193:Stainless Steel; D008628:Mercury; C015728:calomel