Role of nano ZnO particles in the electrodeposition and growth mechanism of phosphate coatings for enhancing the anti-corrosive performance of low carbon steel in 3.5% NaCl aqueous solution

Kathavate, V.S.; Pawar, D.N.; Bagal, Nilesh S.; Deshpande, Pravin P.

doi:10.1016/j.jallcom.2020.153812

Cited by 22 publications

(13 citation statements)

References 44 publications

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“…The shrinking semicircles during the immersion test exhibit the declining anti-corrosion performance. The initial linear portion of the curve shown in Figure 2 c could be attributed to the pseudo-two-time constant phenomenon caused by the penetration of electrolytes through the coating defects [ 21 , 22 ]. Moreover, an electrical equivalent circuit was applied to model Nyquist plots for quantitative evaluation.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Effects of 1-Octyl-3-Methylimidazolium Hexafluorophosphate and Cellulose Nanocrystals on Improving Polyacrylate Waterborne Anti-Corrosion Coatings

Wang

2023

Polymers

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In this study, three copolymers of poly(methyl methacrylate) and poly(butyl acrylate) (PMMA-co-PBA) latex containing 1-octyl-3 methylimidazolium hexafluorophosphate (C8mimPF6), cellulose nanocrystals (CNCs), and C8mimPF6-CNCs were successfully synthesized through mini emulsion polymerization. These novel composites were each coated on mild steel panels and tested for their anti-corrosion performance by immersion of the coated samples in 3.5 wt% sodium chloride (NaCl) solution over a certain period. The synergistic anti-corrosion effects of the C8mimPF6-CNCs sample led to the highest coating resistance, charge transfer resistance, and corrosion inhibition efficiency and the lowest diffusion coefficient and corrosion rate. The proposed synergistic mechanism revealed that CNCs enhanced the barrier effect of the coating while C8mimPF6 inhibited corrosion when released.

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Section: Resultsmentioning

confidence: 99%

Synergistic Effects of 1-Octyl-3-Methylimidazolium Hexafluorophosphate and Cellulose Nanocrystals on Improving Polyacrylate Waterborne Anti-Corrosion Coatings

Wang

2023

Polymers

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“…The calculated average crystallite size of these peaks are 42, 20, 19 and 22 nm. The crystallite size is calculated by using Scherrer formula [8].…”

Section: Resultsmentioning

confidence: 99%

“…It can be seen that, with the variation of Co concentration the percentage of elastic modulus is increases and the elongation is decreases. The increase in elastic modulus due to decrease in grain size and solid solution strengthening of cobalt in alloy coating [8]. 5.…”

Section: Resultsmentioning

confidence: 99%

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Untitled

2022

AEWMR

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Zn-Co-Ni alloy was deposited on mild steel substrate prepared by electrochemical deposition method using sulfate bath. The effect of Co concentration on the surface morphology, microstructure, crystal structure, Vicker's hardness and mechanical properties were studies. Deposition was carried out at suitable working parameters such as temperature, current density, pH and deposition time. Magnetic field was used for coating smoothness and enhancing deposition rate. X-ray diffraction, scanning electron microscopy and mechanical properties were used to investigate the crystal structure, surface morphology and microhardness respectively. The result shows that, when increasing the Co concentration, the microhardness, ultimate tensile strength, yield stress and elastic modulus increased and elongation of Zn-Co-Ni alloy is decreased. Micrographs shows that, globular like morphology change into smooth morphology by increasing the Co concentration. The lattice parameter is decreased by increasing Co concentration.Result also shows that substrate become more applicable by deposition.

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“…Generally, a steel sheet for automobiles is subjected to a phosphate treatment to improve corrosion resistance and ensure coating film adhesion before painting [6,7]. Phosphate crystals form on the steel sheet surface from the phosphate treatment, which greatly enhances the adhesion of electro-painting [7]. The size of the phosphate crystals and coating weight are very important factors: relatively small crystals result in the formation of denser phosphate crystals, resulting in better adhesion to the coating.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Pickling Solution for Improving the Phosphatability of Advanced High-Strength Steels

Cho

Yoo

et al. 2021

Materials

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This study investigated the optimum pickling conditions for improving the phosphatability of advanced high-strength steel (AHSS) using surface analysis and electrochemical measurements. To remove the SiO2 that forms on the surface of AHSS, 30 wt.% NH4HF2 was added to the pickling solution, resulting in a significant reduction in the amount of SiO2 remaining on the surface of the AHSS. The phosphatability was improved remarkably using HNO3 concentrations higher than 13% in the pickling solution. Furthermore, phosphate crystals became finer after pickling with a HNO3-based solution rather than a HCl-based solution. Electrochemical impedance spectroscopy (EIS) data indicated that the corrosion resistance of AHSS subjected to HNO3-based pickling was higher than that of AHSS subjected to HCl-based pickling. Fluorine compounds, which were involved in the phosphate treatment process, were only formed on the surface of steel in HNO3-based solutions. The F compounds reacted with the phosphate solution to increase the pH of the bulk solution, which greatly improved the phosphatability. The phosphatability was better under HNO3-based conditions than a HCl-based condition due to the fineness of the phosphate structure and the increased surface roughness.

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Role of nano ZnO particles in the electrodeposition and growth mechanism of phosphate coatings for enhancing the anti-corrosive performance of low carbon steel in 3.5% NaCl aqueous solution

Cited by 22 publications

References 44 publications

Synergistic Effects of 1-Octyl-3-Methylimidazolium Hexafluorophosphate and Cellulose Nanocrystals on Improving Polyacrylate Waterborne Anti-Corrosion Coatings

Synergistic Effects of 1-Octyl-3-Methylimidazolium Hexafluorophosphate and Cellulose Nanocrystals on Improving Polyacrylate Waterborne Anti-Corrosion Coatings

Untitled

Optimization of Pickling Solution for Improving the Phosphatability of Advanced High-Strength Steels

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