Influence of Surfactants on the Characteristics of Nickel Matrix Nanocomposite Coatings

Abstract

Nickel-based nanocomposite coatings were prepared from a Watts-type electrolyte containing reinforcement's particles (silicon carbide and graphite) to deposit onto the steel St-37 substrate. e electrochemical plating of the coatings in absence and presence of surfactants and reinforcements particles was carried out to optimize high quality coatings with appropriate mechanical and morphological features. e surfactants such as cetyltrimethylammonium bromide (CTAB), sodyumdodecyl sulfate (SDS), and saccharine affected electrodeposition plating and subsequently changed mechanical characteristics. Based on XRD results, the dominant phases in the absence of surfactants were nickel oxide (NiO), nickel, and silicon carbide (SiC), while the main phases in presence of surfactants were nickel (Ni) and SiC. e hardness of the resultant coatings was found to be from 332 to 593 (Hv) depending on the bath parameter and the reinforcements weight percentage (wt%) in the Ni matrix. Microscopic observations illustrated a cluster-like structure which consisted of some �ne sphere particulates with average particle size of 65-150 nm. According to elemental mapping spectra, a homogenous distribution of nickel, silicon, and carbon particles appeared into the nickel matrix coating. Finally, the experimental outcomes demonstrated that the surfactants have signi�cant in�uence on the composition of coatings, surface morphology, and mechanical properties.

Phenomenology and control of buckling dynamics in multicomponent colloidal droplets

“…Introduction of surfactants in nano-suspensions is found to optimize the mechanical and morphological qualities of the final product. [14][15][16] In the current work, it is observed that the rate of buckling is completely altered by increasing the concentration of the surfactant (SDS, 0.2%-2% by weight) and is completely arrested above a critical value (>1% by weight). Addition of salt (AHC) in the dispersion causes re-initiation of buckling in the droplets.…”

Effects of Electroplating Characteristics on the Coating Properties

“…Coating performance can be developed by the addition of the surfactants like (cetyltrimethylammonium bromide (CTAB), sodyumdodecyl sulfate (SDS), and saccharine [20]. The advantage of adding surfactants is their dispersing effect of particles.…”

“…The electroplating parameters must be controlled during electrodeposition since they have significant effect on the coating properties, deposition efficiency and hydrogen evolution. Besides the current density, pH of the bath, bath temperature that places among the main electroplating parameters [36], there are more parameters including the type, the size, the concentration of the particles [37] and the addition of surfactants and their types [20]. The main properties of the coating can be listed as the corrosion resistance in TiO 2 -nickel coating [38], tribological properties in MoS 2 -nickel coating [4], mechanical properties in TiO 2 -nickel coating [38], internal stress in MoS 2 -nickel coating [9], texture in chromium -carbon deposit [39], particle content of the deposit [24] are severely affected by the electroplating parameters.…”

Effects of Sodium Lauryl Sulfate on Co-electrodeposition of Nickel and Fly Ash Particles

“…Also, SLS is an anionic surfactant used as a wetting reagent or a brightener for Ni plating. On the other hand, SLS was studied as a stimulator for Ni composite plating [10,[15][16][17][18][19][20][21]. …”