The impact of surfactants on the properties of electroless Ni–P–SiC coatings

Chintada, Vinod Babu; Gurugubelli, Thirumala Rao; Koutavarapu, Ravindranadh

doi:10.1016/j.matchemphys.2022.126682

Cited by 14 publications

(5 citation statements)

References 41 publications

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“…The hardness of Ni-Cr-P coatings prepared at 220°C heat treatment temperature is significantly higher than the hardness of Ni-P coatings reported in other literature, reaching 552 HV 0.2 (Mabrouk & Farhat, 2023). Although the surface hardness of the sample was relatively high at 220°C, it is essential to consider that, with increasing temperatures, the grain size of the sample's metallographic structure also increased, leading to a decrease in material toughness and strength (Chintada et al, 2023).…”

Section: Surface Hardness Of the Ni-cr-p Coating Following Heat Treat...mentioning

confidence: 71%

Effect of Heat Treatment on Chemical Plating of Ni-Cr-P on 65Mn Alloy Steel

Mei,

Yang,

et al. 2024

International Journal of Information Retrieval Research

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The chemical plating of Ni-Cr-P significantly affects the improvement of the structure and characteristics of the metal surface. This study aimed to investigate the impact of various plating solution components and process parameters on the deposition rate and surface hardness of Ni-Cr-P coatings on 65Mn alloy steel. Additionally, the study examined the changes in coating properties resulting from different heat treatment temperatures. The specimens coated with Ni-Cr-P underwent heat treatment at temperatures of 180°C, 200°C, 220°C, and 240°C, respectively. The testing results indicate that the plating layer achieves its highest level of performance when subjected to a heat treatment temperature of 200°C. The heat-treated coating exhibits superior wear and corrosion resistance compared to the 65Mn steel substrate. Additionally, the coefficient of friction decreases from 0.5 to 0.4. The self-corrosion potential shifts positively from -569 mV to -389 mV, and the corrosion current decreases from 61.4 μA to 14.48 μA. Furthermore, the impedance improves from 234 Ω·cm2 to 3512 Ω·cm2.

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Section: Surface Hardness Of the Ni-cr-p Coating Following Heat Treat...mentioning

confidence: 71%

Effect of Heat Treatment on Chemical Plating of Ni-Cr-P on 65Mn Alloy Steel

Mei,

Yang,

et al. 2024

International Journal of Information Retrieval Research

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“…Nickel chloride (NiCl) and nickel sulphate (NiSO 4 ) are utilized as metal ion bases in an electroless nickel solution. NaPO 2 H 2 and NaBH 4 are used to generate Ni-P and Ni-B coatings, respectively, depending on the type of coating required [ 5 , 6 ]. To escape the breakdown of the electroless bath and to control the reactions, organic salts are utilized as complexing agents.…”

Section: Coating Formation Mechanismmentioning

confidence: 99%

“…In a typical process, sodium hypophosphite (NaPO 2 H 2 ) is extensively operated as a reducing agent. In some cases, sodium borohydride (NaBH 4 ) and dimethylamine borane might be used instead of NaPO 2 H 2 [ 5 , 6 ]. The main advantages of electroless coating are the inexpensiveness and thickness uniformity of the deposit over complex geometries.…”

Section: Introductionmentioning

confidence: 99%

Advancements in Nickel-Phosphate/Boron Based Electroless Composite Coatings: A Comprehensive Review of Mechanical Properties and Recent Developments

Chintada,

Gurugubelli,

Tamtam

et al. 2023

Materials

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Nickel-Phosphate/Boron (Ni-P/B) electroless coatings have been widely used to improve physical and mechanical properties in various industrial applications, including the automotive, aerospace, chemical processing, food, oil and gas, electronic, textile, and printing industries. Electroless nickel coatings are one of the most popular surface-coating methods due to their low cost and short processing time. The purpose of this review is to look at several coating materials and the existing processes for making electroless coatings on different materials. The improvement of Ni-P/B composite coatings by the incorporation of secondary particles into an alloy matrix at the macro, micro, and nano levels is explained in detail. Process parameters like type of surfactant, annealing temperature, size of the reinforcement material, and reducing-agent percentage on mechanical characteristics like hardness, high-temperature oxidation behaviour, friction, coefficient, wear, and corrosion have been broadly researched and illustrated clearly.

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“…However, with a high annealing temperature, the microhardness and corrosion resistance are reduced [14]. The use of surfactants significantly improved the mechanical, tribological, and corrosion properties of electroless composite coatings [15].…”

Section: Introductionmentioning

confidence: 99%

Tribological behavior of autocatalytic Ni-P based duplex coatings

Biswas,

Das,

Sahoo

2024

Phys. Scr.

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The present research evaluates the tribological performance of different Ni-P based duplex autocatalytic coatings (electroless coatings). The study investigates coatings including Ni-P/Ni-W-P, Ni-P/Ni-Mo-P, and Ni-P/Ni-Cu-P, examining various factors such as heat treatment conditions, sample composition, and their influence on the coatings' performance. The phase structure of the coatings is influenced by heat treatment parameters viz. temperature and duration as well as phosphorus content. Notably, at temperatures above 400°C, all duplex coatings form a robust nickel phosphide phase, enhancing hardness and wear resistance which is almost double of that in as-deposited state in some cases. When subjected to a temperature of 400°C for duration of 1 hour, the Ni-P/Ni-W-P coating displays the highest microhardness (1440 HV 0.1) and the lowest wear rate (10.62×10-5. mm3. N-1. m-1) among all the duplex coatings. In all three duplex systems, the wear typically involves a combination of abrasive and adhesive mechanisms. Among the as-deposited coatings, the Ni-P/Ni-Cu-P demonstrates higher corrosion potential (Ecorr -302 mV) and lower corrosion current (icorr 1.83×10-5 mA/cm2) which imply superior corrosion resistance compared to the other duplex coatings. In the heat-treated state, the Ni-P/Ni-Mo-P duplex coating generally exhibits better corrosion resistance when compared to the other two types of duplex coatings. 

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The impact of surfactants on the properties of electroless Ni–P–SiC coatings

Cited by 14 publications

References 41 publications

Effect of Heat Treatment on Chemical Plating of Ni-Cr-P on 65Mn Alloy Steel

Effect of Heat Treatment on Chemical Plating of Ni-Cr-P on 65Mn Alloy Steel

Advancements in Nickel-Phosphate/Boron Based Electroless Composite Coatings: A Comprehensive Review of Mechanical Properties and Recent Developments

Tribological behavior of autocatalytic Ni-P based duplex coatings

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