Enhancement of the Pitting Corrosion Resistance of AISI 316LVM Steel with Ta-Hf-C/Au Bilayers for Biomedical Applications

Abstract

Tantalum carbide (TaC), hafnium carbide (HfC), and Ta-Hf-C mixed coatings with and without a gold (Au) interlayer were deposited on 316LVM steel substrates by the magnetron cosputtering technique in order to improve the corrosion resistance of steel substrates in a simulated biological fluid. To study the effect of the gold interlayer on pitting corrosion, the different systems were placed in contact with Ringer’s solution at pH 7.4 and a temperature of 37°C. The electrochemical properties of the coatings were determined using polarization curves. Subsequently, the surface morphologies were observed using scanning electron microscopy (SEM) in order to analyze the corrosion processes on the different surfaces. The gold interlayer was found to significantly improve the electrochemical properties of the system, showing a decrease in the pitting corrosion and deterioration rate, while it is expected that the binary and ternary carbides provide mechanical stability to the bilayers protecting the gold.

Si-Al-N-O Multi-Layer Coatings with Increased Corrosion Resistance Deposited on Stainless Steel by Magnetron Sputtering

“…The authors [43,[53][54][55][56] consider that nanocomposite coatings have undeniable advantages due to the nanostructuring of the applied coatings. Multi-layer coatings [58] create an additional barrier. This is explained by the fact that, due to the All these factors testify to increased corrosion resistance of stainless-steel specimens with Al-Si-N and Al-Si-N-O/Al-Si-O coatings, which ultimately increases for the multilayer coating, as compared to uncoated specimens.…”

“…The authors [43,[53][54][55][56] consider that nanocomposite coatings have undeniable advantages due to the nanostructuring of the applied coatings. Multi-layer coatings [58] create an additional barrier. This is explained by the fact that, due to the different chemical composition of each of the layers, barriers arise that prevent the development of a leading channel for the corrosive environment penetration (Figure 7).…”

Exploring the Interplay between Tribocorrosion and Surface Chemistry of the ASTM F139 Surgical Stainless Steel in Phosphate-Buffered Saline Solution

“…ASTM F138 and ASTM F139 are the designations of implant-quality stainless steels for orthopedic applications [6]. However, despite the attractiveness of stainless steel devices, it is well-known that they are prone to localized corrosion in the human body due to chloride-induced pitting attack [7][8][9].…”

Characterization of the Micro-Abrasive Wear in Coatings of TaC-HfC/Au for Biomedical Implants

“…As a result of the requirement for improving the wear resistance, the PVD technique has allowed the deposition of thin films that modify the physical and chemical properties of the surface without modifying the mechanical properties of the substrate [ 10 , 11 , 12 ]. The use of tantalum as a biomaterial has good acceptance due to improvement in the corrosion resistance and wear resistance, and it also has good biocompatibility inside the human body [ 13 , 14 ]. Likewise, different studies have shown the significant applicability of tantalum as a coating because it exhibits similar mechanical properties as bone, such as high hardness and flexibility.…”