EIS capacitance diagnosis of nanoporosity effect on the corrosion protection of DLC films

Influence of carbon sputtering power on structure, corrosion resistance, adhesion strength and wear resistance of platinum/ruthenium/nitrogen doped diamond-like carbon thin films

“…It can be seen that the increased kinetics of the sputtered C species with increased carbon sputtering power may increase the porosity level in DLC films by increasing the unbalance between the kinetics of the sputtered species and the surface mobility of the adatoms [38]. Thus, the electrolyte permeated through the porosities preferentially attacks the underlying Si substrates because the electrochemical stability of the Si substrates is lower than that of the DLC films [10]. At the same time, the permeated electrolyte causes galvanically-induced corrosion between the films and the substrates due to their different electrochemical potentials [10].…”

“…Thus, the electrolyte permeated through the porosities preferentially attacks the underlying Si substrates because the electrochemical stability of the Si substrates is lower than that of the DLC films [10]. At the same time, the permeated electrolyte causes galvanically-induced corrosion between the films and the substrates due to their different electrochemical potentials [10]. In addition, the attack of the electrochemically active species in the electrolyte on the film/substrate interfaces can result in undermining of the films.…”

“…It has been reported that DLC films always contain porosities that can allow an electrolyte to permeate through the films to access their substrates, resulting in a rapid dissolution of the substrates [10]. During DLC film depositions, an unbalance between the kinetics of impinging species and the surface mobility of adatoms induces the formation of porosities in the films [11].…”

Effect of gold oxide incorporation on electrochemical corrosion resistance of diamond-like carbon

“…The greatest E corr of − 0.274 mV was measured from the AuO x :DLC coating. The negative OCP values for the DLC and AuO x :DLC coatings may be caused by the penetration of the electrolyte [23,24]. The electrochemical parameters obtained from the potentiodynamic polarization curves (Fig.…”

Effects of water plasma immersion ion implantation on surface electrochemical behavior of NiTi shape memory alloys in simulated body fluids

“…EIS is an effective tool to assess the surface corrosion process and disclose the mechanism for thin films fabricated on metals or alloys [20][21][22]]. An electrochemical system can be established using EIS and different equivalent electrical circuit models can be adopted to explain the phenomena that occur at the metal/film and film/solution interfaces as well as inside the film [23][24][25].…”