Effect of Incorporating MoS2 in Organic Coatings on the Corrosion Resistance of 316L Stainless Steel in a 3.5% NaCl Solution

Abstract

This study discusses a new coating method to protect 316L stainless steel (SS) from pitting corrosion in high chloride environments. The SS surface was coated using a simple, eco-friendly method, and sunflower oil (SunFO) was used as a base coating and binder for molybdenum disulfide (MoS2). The coated surface was observed using scanning electron microscopy (SEM) with an energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). Corrosion behavior was examined by open-circuit potential (OCP) measurement and electrochemical impedance spectroscopy (EIS) in an 3.5% NaCl solution. The SunFO coating with MoS2 showed the highest corrosion resistance and coating durability during the immersion time relative to the SunFO coating and bare 316L SS. The increased corrosion resistance is thought to be because of the interactions with the aggregations of the SunFO lamellar structure and MoS2 in the coating film, which acted as a high order layer barrier providing protection from the metals to electrolytes.

Highly Sensitive Electrochemical Aptasensor for Detecting the VEGF165 Tumor Marker with PANI/CNT Nanocomposites

“…On the other hand, the modified electrodes revealed semicircle curves, indicating that the electron transfer between (Fe(CN) 6 ) 3−/4− and the electrode was blocked by the PANI, PANI/CNT, and PANI/CNT/Apt layers on the electrode [ 16 ]. The circuits are described as two modes: electrolyte resistance (R s ), charge transfer resistance (R ct ), layer (coating) resistance (R layer ); CPE1 is the dielectric strength of the layer and solution absorbed by the layer and electric double layer at the electrolyte/substrate interface (CPE2) used for interface capacitance and Warburg diffusion impedance (W) at a low frequency [ 42 , 43 ]. In the EIS test results, the modified electrodes show incomplete semi-circle features.…”

Effect of Nano-SnS and Nano-MoS2 on the Corrosion Protection Performance of the Polyvinylbutyral and Zinc-Rich Polyvinylbutyral Coatings

“…These can be further confirmed by FESEM observation. Compared to graphene-based films or other composite coatings with nanomaterials as fillers, the composite coatings prepared herein have higher ηP and R ct values [43,44], meaning that the coatings have better corrosion resistance. At last, the results of the molecular dynamics (MD) simulation show that both nano-SnS and nano-MoS 2 are adsorbed strongly on the copper surface, and the binding energy of nano-MoS 2 is larger than that of nano-SnS.…”

Effect of Benzotriazole on the Localized Corrosion of Copper Covered with Carbonaceous Residue

“…The heating temperature complies with the ASTM B88 standard, which is the soft annealing standard of C12200 copper [ 21 , 22 ]. At this temperature, the fatty ester, a constituent of the drawing lubricant, polymerizes through oxidation [ 23 ]. Table 2 presents the chemical composition of the drawing lubricant.…”