The surfactant addition effect in the elaboration of electrodepositated NiP-SiC composite coatings

Malfatti, Célia de Fraga; Veit, Hugo Marcelo; Menezes, Tiago Lemos; Ferreira, Jane Zoppas; Rodriguês, J.S.; Bonino, Jean-Pierre

doi:10.1016/j.surfcoat.2006.11.040

Cited by 49 publications

(43 citation statements)

References 19 publications

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“…2a-c). This phenomenon, also observed by other authors in similar systems [11,20,25,[35][36][37], may be based upon the probability of mechanical interaction between the cathode and the suspended particles. The particle is completely incorporated into the metallic matrix only when the deposit reaches a certain thickness, so that the ejection, caused by the arriving particles, is restrained.…”

Section: Coating Processsupporting

confidence: 78%

Electrochemical behavior of NiPSiC composite coatings: Effect of heat treatment and SiC particle incorporation

Malfatti

Ferreira

Oliveira

et al. 2010

Materials & Corrosion

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This paper describes the effects of heat treatment and of SiC particle incorporation on the electrochemical behavior and physical structure of Ni-P (17 at% P) composite coatings. The deposits were obtained by electrodeposition with various contents of SiC particles in the plating bath and heat treated at 420 8C. The physical structure was investigated by inductively coupled plasma atomic emission spectrometry (ICP-AES), X-ray diffraction (XRD), and scanning electron microscopy (SEM -image analysis). The electrochemical behavior of the resultant composite coatings was determined by chronopotentiometry, electrochemical impedance spectroscopy, and potentiodynamic measurements in 0.6 M NaCl solution at pH 6. Heat treatment showed a positive effect on the electrochemical behavior of Ni-P coatings, shifting the open circuit potential toward less active potentials. The incorporation of SiC particles inhibited pit nucleation on the Ni-P composite coating, with or without post-heat treatment. However, heat treatment in the Ni-P-SiC seemed to induce cracks in the metallic matrix, initiating at the SiC particles, possibly caused by the contraction in the metallic matrix. The cracked structure promoted localized corrosion, while coatings without heat treatment resulted in a general and uniform corrosion.

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Section: Coating Processsupporting

confidence: 78%

Electrochemical behavior of NiPSiC composite coatings: Effect of heat treatment and SiC particle incorporation

Malfatti

Ferreira

Oliveira

et al. 2010

Materials & Corrosion

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“…Various additives have been studied to reduce the agglomeration of particles [30], increasing the volume fraction of SiC particles in the deposit, good dispersion and high hardness. In general, cationic and anionic surfactants are being used to change the surface characteristics of the particles [12,[30][31][32][33][34][35][36][37][38][39][40][41]. Saccharine has been used by Zimmerman et al and Lei Shi et al [22,42].…”

Section: Introductionmentioning

confidence: 99%

Effect of Surfactants on the Electrodeposition of Ni-SiC Composites

Narasimman

Pushpavanama

Periasamyb

2012

Port. Electrochim. Acta

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The effect of various surfactants on the volume% codeposition of SiC in a nickel matrix was evaluated. Of the various surfactants tried, tetra methyl ammonium hydroxide (TMAH) was found to be the best for improving the quality of the deposits as well as the homogenous distribution of particles and with reasonable volume% of silicon carbide incorporation in the matrix. Composites were produced using 1 µm and 50 nanometer size powders. The effect of silicon carbide concentration and bath operating variables on the volume% of SiC incorporation in the deposit and the deposition rates were estimated. Substantial improvement in mechanical properties such as hardness and wear resistance was obtained with the nano SiC composite compared to the micro SiC composite.

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“…Consequently, applications and requirements investigations have been carried out with the aim of improving specific aspects of the product or the process. Recently, some researchers showed that adding surfactant in the bath improves the coating morphology and other properties of the coating [9][10][11]. Surfactants are surface active agents that lower the surface tension of a liquid, allowing easier spreading and lower the interfacial tension between two liquids.…”

Section: Introductionmentioning

confidence: 99%

Corrosion performance of the electroless Ni–P coatings prepared in different conditions and optimized by the Taguchi method

Farzaneh

Ehteshamzadeh

Mohammadi³

2010

J Appl Electrochem

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This paper presents an experimental study on the influence of anionic surfactant sodium dodecyl sulfate (SDS), pH, substrate finishing and annealing temperature on the corrosion resistance of electroless nickel phosphorus (Ni-P) coatings using electrochemical techniques and optimization of process parameters based on the Taguchi method. Parameters were selected in three levels and L9 from orthogonal robust array design was used. Corrosion performance of the electroless Ni-P coatings was evaluated by polarization and electrochemical impedance spectroscopy (EIS). Scanning electron microscope (SEM), Energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analysis were used for studying surface morphology and chemical composition of the electroless Ni-P coatings. The results showed that SDS surfactant causes increasing of corrosion resistance and improves surface morphology. Finally, optimum conditions were achieved as, surfactant concentration: 1.5 g L -1 , pH: 5.5, substrate finishing provided with emery paper no, 2000, and annealing temperature of 200°C.

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The surfactant addition effect in the elaboration of electrodepositated NiP-SiC composite coatings

Cited by 49 publications

References 19 publications

Electrochemical behavior of NiPSiC composite coatings: Effect of heat treatment and SiC particle incorporation

Electrochemical behavior of NiPSiC composite coatings: Effect of heat treatment and SiC particle incorporation

Effect of Surfactants on the Electrodeposition of Ni-SiC Composites

Corrosion performance of the electroless Ni–P coatings prepared in different conditions and optimized by the Taguchi method

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