The Influence of CTAB Surfactant on the Dispersion of Al2O3 Particles and Deposition Rate of Electroless Ni-P-Al2O3 Coatings

2015 ◽  
Vol 1095 ◽  
pp. 641-646
Author(s):  
Da Yong Liu ◽  
Jie Yu
Keyword(s):  
Mild Steel ◽  
Cationic Surfactant ◽  
Deposition Rate ◽  
Repulsive Force ◽  
Polyvinyl Pyrrolidone ◽  
Ammonium Bromide ◽  
Ctab Concentration ◽  
Steel Shaft ◽  
Electroless Ni

In this paper, electroless Ni-P-Al2O3coatings have been synthesized on mild steel shaft by adding various concentration of cetyltrimethyle ammonium bromide (CTAB) into plating baths. Compared with Polyvinyl pyrrolidone (PVPk30), cationic surfactant CTAB shows better effect in dispersing the Al2O3particles. With the increasing of CTAB concentration in the plating baths, dispersion of Al2O3particles in the Ni-P-Al2O3coatings was improved due to high electrostatic repulsive force between Al2O3particles and CTAB molecular, whereas deposition rate of the Ni-P-Al2O3coatings was decreased.

Influence of a Zwitterionic Surfactant on the Surface Properties of Electroless Ni–P Coating on Mild Steel

2016 ◽  
Vol 19 (5) ◽  
pp. 1081-1088 ◽  
Author(s):  
R. Muraliraja ◽  
R. Elansezhian ◽  
J. Sudagar ◽  
A. V. Raviprakash
Keyword(s):  
Mild Steel ◽  
Surface Properties ◽  
Zwitterionic Surfactant ◽  
Electroless Ni

scholarly journals Influences of Bath Chemistry and Plating Variables on Characteristics of Electroless Ni–P Films on Si Wafers from Alkaline Citrate Solutions

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Naiming Miao ◽  
Jinjin Jiang ◽  
Wangping Wu
Keyword(s):  
Thermal Stability ◽  
Chemical Composition ◽  
Deposition Rate ◽  
Electroless Nickel ◽  
Monocrystalline Silicon ◽  
P Content ◽  
Almost All ◽  
P Type ◽  
Electroless Ni ◽  
Thermal Stability Of

Electroless nickel–phosphorus (Ni–P) films were produced on the surface of p-type monocrystalline silicon in the alkaline citrate solutions. The influences of bath chemistry and plating variables on the chemical composition, deposition rate, morphology, and thermal stability of electroless Ni–P films on silicon wafers were studied. The as-deposited Ni–P films were almost all medium- and high-P deposits. The concentrations of Ni2+ and citric ions influenced the deposition rate of the films but did not affect P content in the deposits. With increasing H2PO2− content, the P content and deposition rate were steadily increased. The pH and plating temperature had a significant effect on the chemical composition and the deposition rate of the films. The thermal stability of the medium-P film was better than that of the high-P deposit. At the same time, the proposed mechanism of Ni–P films on monocrystalline silicon substrates in the alkaline bath solution was discussed and addressed.

The Effect of Surfactant on the Morphology of SnO2 Nanoarrays

2011 ◽  
Vol 338 ◽  
pp. 495-498
Author(s):  
Ya Li Wang ◽  
Yu Jing ◽  
Qiang Zhen
Keyword(s):  
Nonionic Surfactant ◽  
Hydrothermal Method ◽  
Cationic Surfactant ◽  
Tin Oxide ◽  
Anionic Surfactant ◽  
Indium Tin Oxide ◽  
Polyvinyl Pyrrolidone ◽  
Disordered Structure

The morphology of SnO2nanoarrays prepared on indium tin oxide (ITO) substrates by hydrothermal method can be controlled through using different surfactants. The surfactants play an important role in influencing the morphology and size of SnO2nanoarrays. The rod-like nano-arrays prepared by using cationic surfactant, disordered structure randomly assembled by nanoparticle obtained by using anionic surfactant, the flower-like nanoarrays synthesized by using nonionic surfactant. Furthermore, the effect of the amount of nonionic surfactant-polyvinyl pyrrolidone(PVP) on the morphology and size of flower-like SnO2nanoarrays has systematically been investigated.

N-cetyl-N,N,N trimethyl ammonium bromide (CTAB)-stabilized polyaniline: a corrosion inhibitor for mild steel

2018 ◽  
Vol 65 (2) ◽  
pp. 146-151 ◽  
Author(s):  
Mohd Rashid ◽  
Umesh S. Waware ◽  
Afidah A. Rahim ◽  
A.M.S. Hamouda
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Acidic Medium ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
High Dispersion ◽  
Ammonium Bromide ◽  
Content Type

Purpose The purpose of this study is to compare the inhibitive effect of polyaniline (PAni) and N-cetyl-N,N,N trimethyl ammonium bromide (CTAB)-stabilized PAni in a hydrochloric acid (HCl) medium. Design/methodology/approach PAni has been deposited potentiodynamically on mild steel in the presence of CTAB as a stabilizing agent to achieve high corrosion inhibition performance by the polymer deposition. The corrosion inhibition studies of CTAB-stabilized PAni inhibitor in 0.1 M HCl acidic solution was carried out by electrochemical methods, namely, open-circuit potential, potentiodynamic polarization and electrochemical impedance spectroscopy technique. Findings The results of electrochemical studies have shown that the CTAB-stabilized PAni inhibitor has higher corrosion efficiency than PAni on mild steel in 0.1 M HCl solution. The maximum per cent efficiency evaluated using the potentiodynamic polarization method is approximately 91.9. Originality/value CTAB-stabilized PAni has never been studied as a corrosion inhibitor for mild steel in an acidic medium. The investigations demonstrate relatively the better corrosion inhibition efficiency and high dispersion of the polymer in the acidic medium.

Anti corrosive electroless Ni‐P films for mild steel materials

2012 ◽  
Vol 59 (2) ◽  
pp. 69-75 ◽  
Author(s):  
Thimmappa Venkatarangaiah Venkatesha ◽  
Sudhakar Ranganatha
Keyword(s):  
Mild Steel ◽  
Electroless Ni

Synthesis and Characterization of γ-Al2O3 Nanowires by a Surfactant Assisted Precipitation Method

2014 ◽  
Vol 602-603 ◽  
pp. 93-96 ◽  
Author(s):  
Fan Cheng Meng ◽  
Cheng Liu ◽  
Xiao Lei Zhang ◽  
Hai Shen Ren ◽  
Tie Kun Jia
Keyword(s):  
Raw Materials ◽  
Sodium Aluminate ◽  
Precipitation Method ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
Structure Directing Agent ◽  
Ctab Concentration ◽  
Transmission Electron ◽  
Cetyltrimethyl Ammonium ◽  
Surfactant Assisted

In this study, the γ-Al2O3 nanowires were prepared by a simple surfactant assisted precipitation method using the cetyltrimethyl ammonium bromide (CTAB) as a structure-directing agent (SDAs). Homemade sodium aluminate (NaAlO2) and H2O2 were used as raw materials. The influences of CTAB concentration and calcination temperature on the morphology of product were discussed. The obtained samples were investigated using transmission electron microscopy, X-ray diffraction analysis and TG-DSC. In the end, a possible formation mechanism of wire-like γ-Al2O3 is proposed.

Investigation on corrosion performance of multilayer Ni-P/TiO2 composite coating on steel

2016 ◽  
Vol 23 (3) ◽  
pp. 309-314
Author(s):  
M. Edwin Sahayaraj ◽  
J.T. Winowlin Jappes ◽  
I. Siva ◽  
N. Rajini
Keyword(s):  
Corrosion Resistance ◽  
Mild Steel ◽  
Corrosion Behavior ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Multilayer Coating ◽  
Electroless Nickel ◽  
Corrosion Mechanism ◽  
Corrosion Performance ◽  
Electroless Ni

AbstractElectroless nickel coating treatment improves the corrosion resistance of mild steel. This work aims at studying the corrosion behavior of electroless Ni-P/TiO2 composite and multilayer coatings applied to the mild steel substrate as their as-plated state and furnace annealed at various temperatures and compared both the coatings’ corrosion performance. The corrosion behavior of the deposits was evaluated by potentiodynamic polarization studies in 3.5 wt% sodium chloride solution. The results showed that the corrosion resistance of the multilayer coating was two times higher compared to the composite coatings. Further, the corrosion mechanism was discussed in terms of microstructure, phase transformation, grain size, and microstrain.

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