Corrosion and passivation behavior of two types of stainless steels (DSS duplex 2205 and AISI 316L) in artificial saliva and with the addition of fluoride was studied using electrochemical impedance spectroscopy (EIS) and potentiodynamic measurements. We found that passive zone DSS 2205 significantly larger than the passive zone AISI316L in both types of solutions. The formation of passive film was studied using EIS at open circuit potential (OCP). Passive layer, resulting in open circuit voltage of both materials were analyzed by photoelectron spectroscopy (XPS). In the passive layers of both materials are mainly Cr-oxides. The study showed that the corrosion properties of DSS 2205 is better than AISI 316L, especially under potentiodynamic conditions. This confirms the suitability of 2205 DSS for orthodontic applications.
COBISS.SI-ID: 24275239
In this work the tribological properties of DLC coatings prepared by two deposition techniques were studied. The emphasis was given on double layer Cr/DLC coatings deposited by a closed drift ion beam technique (anode layer source, ALS) with C2H2 and N2 carrier gases. Pin-on-disk experiments showed that the DLC coatings possess excellent wear resistance (wear rate down to 12 μm3/Nm) and also low values of coefficient of friction (down to 0.055). In addition, we measured the Vickers microhardness (1000–3100 HV) and performed the scratch test (LC in the range 40–100 N) and Rockwell indentation test to measure adhesion.
COBISS.SI-ID: 24806183