Ex situ IRAS spectra for ([a] and [c]) Type 303 and ([a] and [b]) Type 316L exposed 24 h at 37°C in (a) PBS + 40 g/L BSA + 2.67 g/L Fbn (“BSA, Fbn”), or in PBS, (b) sequential solutions of PBS followed by PBS (“PBS”), PBS + 40 g/L BSA followed by PBS + 40 g/L BSA (“BSA”), PBS + 2.67 g/L Fbn followed by PBS + 2.67 g/L Fbn (“Fbn”), and PBS + 40 g/L BSA followed by PBS + 5.34 (final concentration of 2.67) g/L Fbn (“BSA, Fbn”). The coupons were rinsed with ultrapure water after the exposures and stored at dry conditions prior to IRAS measurements.