Polynitroaniline as brightener for zinc-nickel alloy plating from non-cyanide sulphate bath

Sachin, H. P.; Achary, Ganesha; Naik, Y. Arthoba; Venkatesha, T. V.

doi:10.1007/s12034-007-0010-0

Cited by 16 publications

(8 citation statements)

References 14 publications

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“…Organic additives were often added to alloy plating bath, which improves the properties of deposits. It make the surface more durable, uniform and compact for better performance in terms of corrosion protection and mechanical properties (Sachin et al 2007;Mosavat et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Effect of ethyl vanillin on ZnNi alloy electrodeposition and its properties

Nayana

Venkatesha

2014

Bull Mater Sci

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The bright ZnNi alloy coating on steel surface was prepared by elctrodepostion technique using brightener ethyl vanillin (EV). To know the influence of brightener on deposition and dissolution behaviour of ZnNi alloy, cyclic voltammetric studies were carried out. FT-IR spectroscopic evidence was given to confirm selective adsorption of brightener on steel surface. The brightener enhances current efficiency and throwing power of plating bath during coating. The scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses in presence of brightener confirmed the change in surface morphology, phase composition and preferred orientation of ZnNi coating. In presence of brightener, nickel content of the coating was reduced at higher current density and thickness. In addition, deposit properties like appearances, hardness, adherence, ductility and corrosion resistance of ZnNi alloy deposits were also improved in bright deposit. Simultaneously, effect of deposition current density and thickness on corrosion behaviour of coating was examined.

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Section: Introductionmentioning

confidence: 99%

Effect of ethyl vanillin on ZnNi alloy electrodeposition and its properties

Nayana

Venkatesha

2014

Bull Mater Sci

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“…The coating thickness was in the range of 15-20 μm. The specimens after plating were subjected to bright dip in 1% nitric acid, then it was water wash. A Ferroxyl test was done to assess the porosity of the deposit [19,20]. This test indicated porous free nature of the deposit.…”

Section: Film Formation and Anticorrosive Behavior Of Zn-zsm-5 Nano-smentioning

confidence: 99%

Film Formation and Anticorrosive Behavior of Zn-ZSM-5 Nano-Sized Zeolite Composite Coatings

Safaei¹,

Safaei²,

Rahmanian³

2012

TOELECJ

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Abstract:The zinc-Zeolite Socony Mobil-Five nano-particles (Zn-ZSM-5 NPs) composite was prepared and applied successfully as a new coating material to improve the corrosion resistance of steel. The corrosion type and quality of both pure zinc and our new coating material, Zn-ZSM-5 NPs, were studied using mass loss, impedance and electro-chemical polarization techniques in a sodium chloride solution. Obtained results affirm that Zn-ZSM-5 NPs are non-permeable and their corrosion resistance is higher than the pure zinc. The surface morphology of our newly synthesized coating material, Zn-ZSM-5 NPs, was investigated using SEM and X-ray diffraction and the smaller grain size was observed in comparison with the pure zinc coating.

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“…Organic coatings are widely used for protecting metals from corrosion. Typically, organic additives are added to the alloy plating bath and tend to enhance the shiny appearance, smoothness, durability, and compact nature of alloy deposits, thereby leading to an improvement in the corrosion resistance and mechanical properties of metals [1][2]. Additives are extensively used in plating baths because of their low toxicity, easy handling, small required amounts, and easier effluent treatment after degradation [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of benzaldehyde on the electrodeposition and corrosion properties of Ni–W alloys

Kumar

Kennady

2015

Int J Miner Metall Mater

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The effect of different concentrations of benzaldehyde on the electrodeposition of Ni-W alloy coatings on a mild steel substrate from a citrate electrolyte was investigated in this study. The electrolytic alkaline bath (pH 8.0) contained stoichiometric amounts of nickel sulfate, sodium tungstate, and trisodium citrate as precursors. The corrosion resistance of the Ni-W-alloy-coated specimens in 0.2 mol/L H 2 SO 4 was studied using various electrochemical techniques. Tafel polarization studies reveal that the alloy coatings obtained from the bath containing 50 ppm benzaldehyde exhibit a protection efficiency of 95.33%. The corrosion rate also decreases by 21.5 times compared with that of the blank. A higher charge-transfer resistance of 1159.40 Ω·cm 2 and a lower double-layer capacitance of 29.4 µF·cm −2 further confirm the better corrosion resistance of the alloy coating. X-ray diffraction studies reveal that the deposits on the mild steel surface are consisted of nanocrystals. A lower surface roughness value (R max ) of the deposits is confirmed by atomic force microscopy.

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Polynitroaniline as brightener for zinc-nickel alloy plating from non-cyanide sulphate bath

Cited by 16 publications

References 14 publications

Effect of ethyl vanillin on ZnNi alloy electrodeposition and its properties

Effect of ethyl vanillin on ZnNi alloy electrodeposition and its properties

Film Formation and Anticorrosive Behavior of Zn-ZSM-5 Nano-Sized Zeolite Composite Coatings

Effect of benzaldehyde on the electrodeposition and corrosion properties of Ni–W alloys

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