Characteristics of Zinc Phosphate Coating Activated by Different Concentrations of Nickel Acetate Solution

Abdalla, Khalid; Hussain, Zuhailawati; Rahmat, Azmi; Aziz, Azizan

doi:10.1007/s11661-016-3876-x

Cited by 6 publications

(5 citation statements)

References 29 publications

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“…By contrast, only one layer of G/WPU spraying ink was coated on the cotton fabric without the inner and outermost layer of WPU, named as G/WPU. The coating weight was employed as the parameter to evaluate the coating results, and W (g/m 2 ) could be calculated by the following equation: where W 1 is the weight after spray coating process, W 2 is the pristine weight of control sample, and A is the surface area of the original sample.…”

Section: Methodsmentioning

confidence: 99%

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High Efficiency Electrothermal Graphene/Tourmaline Composite Fabric Joule Heater with Durable Abrasion Resistance via a Spray Coating Route

Tian

Zhao

et al. 2018

Ind. Eng. Chem. Res.

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Durable abrasion resistance is the critical capability for the functional textile via coating treatment routes. Here, an abrasion resistant fabric-based Joule heater with sandwich structure was fabricated via spraying in sequence of water-soluble polyurethane (WPU), then composite ink of graphene, WPU and tourmaline, and at last WPU. The composite fabrics with the incorporation of tourmaline exhibited favorable electrothermal performance, which could achieve a steady-state temperature of 75.4 °C in 30 s under 10 V voltage, and possessed a high power density (2 × 10 3 W/m 2 ). The flexible heater exhibited remarkable abrasion shielding performance, only resulting in 21.1% electrical conductivity reduction after a 2500-cycles abrasion test, far less than the 87.0% of fabrics without a sandwich structure. The application on thermal therapy of the hand exhibited 1.8 °C rise of blood vessel around the heater under 8 V voltage. Therefore, the asobtained Joule heater can be widely applied in functional protective garments and medical electroheating wearable devices.

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Section: Methodsmentioning

confidence: 99%

“…By contrast, only one layer of G/WPU spraying ink was coated on the cotton fabric without the inner and outermost layer of WPU, named as G/WPU. The coating weight 19 was employed as the parameter to evaluate the coating results, and W (g/m 2 ) could be calculated by the following equation:…”

Section: Preparation Of the Spray-coated Compositementioning

confidence: 99%

High Efficiency Electrothermal Graphene/Tourmaline Composite Fabric Joule Heater with Durable Abrasion Resistance via a Spray Coating Route

Tian

Zhao

et al. 2018

Ind. Eng. Chem. Res.

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“…The phosphated samples were rinsed with deionized water and dried with compressed air. The coating weight of phosphated samples was determined according to the following equation (Abdalla et al , 2017; Banczek et al , 2008): where W is the layer weight per unit area, W 1 is the sample weight after phosphating, W 2 is the weight of the sample after eliminating the phosphate layer using a 5% chromium trioxide solution for 15 min at 70°C, and A is the sample area exposed to the phosphating solution.…”

Section: Methodsmentioning

confidence: 99%

“…Pretreatment process with metal salts like copper acetate and nickel acetate before phosphating step are very helpful in accelerating the deposition of zinc phosphate coating on a steel surface. These salts create many nucleation sites on the metal surface through formation of small galvanic cells between Fe and Cu or Fe and Ni, which subsequently accelerate the coating formation (Abdalla et al , 2013, 2017). The advantage of using such pretreatment is that the solution of activation treatment can be used for long time without the problems of sedimentation and coagulation that have existed in the traditional activation process of titanium aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Corrosion performance and morphological analysis of activated zinc phosphate coating formed on steel surface

Abdalla

Hussain

2021

ACMM

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Purpose The purpose of this paper is to study the effect of different concentrations of pretreatment solution of copper acetate (1, 5 and 10 g/L) on the deposition, growth and protection ability of zinc phosphate coating. Design/methodology/approach Zinc phosphate coatings were deposited on steel surface by immersion method. Scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) were used to study the morphological evolution and chemical analysis of formed coatings. The electrochemical performance of the coatings was evaluated via potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS) and immersion test in an aerated 3.5% NaCl solution. Findings The results showed that the activation treatment accelerated the deposition of the phosphate coating and improved its surface coverage. A higher phosphate coating weight (7.35 g/m2) and more compact structure was obtained with pretreatment solution of 1 g/L copper acetate. Electrochemical results revealed that the protection ability of the phosphated substrates was markedly enhanced after the pretreatment, and the best corrosion protection was obtained with a concentration of 1 g/L copper acetate solution. The corrosion current density of phosphated substrate was reduced by 64.9% after activation treatment with 1 g/L copper acetate solution. Originality/value In this investigation, dense, stable and compact zinc phosphate layers with improved corrosion resistance were formed on a carbon steel surface after activation pretreatment with copper acetate solution prior to a phosphating step.

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“…Mediumcontents of phosphorus (5 to 9 % P) have a lesser crystalline size but somewhat tend to remain semi-amorphous, on the other hand high-phosphorus contents (over 10 percent P) be present mostly as glass metal. Generally when the deposition of phosphorous content is high, the good corrosion resistance is achieved but the low phosphorous content exhibit bad corrosion resistance [15][16].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Corrosion Resistance in Stainless Steel 316L Alloy of Energy Separator by Electroless Plating (Ni-Zn-P)

Alghazali,

Alfatlawi

2023

BIO Web Conf.

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The corrosion and hardness resistance of Ni-P coating is well recognized. By adding Zn, the electrochemical and mechanical properties of these coatings can be improved. In the coating procedure, two distinct periods of 1-hour and 2-hours are used. To improve the surface qualities of coating specimens, heat treatment at 400oC for one hour is performed. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive analysis (EDS) were used to analyze the deposits. The hardness values of the coated heat-treated samples exceeded 900HV when compared to the bare and as-plated samples. The Tafel extrapolation test is used to determine the voltage and corrosion current in a 3.5% NaCl solution in order to calculate the corrosion rate. Corrosion rates are reduced from 1.81 mpy in bare specimens to 0.0642 mpy in heat treated plated specimens.

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Characteristics of Zinc Phosphate Coating Activated by Different Concentrations of Nickel Acetate Solution

Cited by 6 publications

References 29 publications

High Efficiency Electrothermal Graphene/Tourmaline Composite Fabric Joule Heater with Durable Abrasion Resistance via a Spray Coating Route

High Efficiency Electrothermal Graphene/Tourmaline Composite Fabric Joule Heater with Durable Abrasion Resistance via a Spray Coating Route

Corrosion performance and morphological analysis of activated zinc phosphate coating formed on steel surface

Investigation of Corrosion Resistance in Stainless Steel 316L Alloy of Energy Separator by Electroless Plating (Ni-Zn-P)

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