Influence of Heat Treatment on Crystal Structure, Microhardness and Corrosion Resistance of Bilayer Electroless Ni-P-SiC/Ni-P-Al2O3 Coatings

Uppada, Sudhakar; Ramji, K.; Chintada, Vinod Babu; Koutavarapu, Ravindranadh

doi:10.1007/s12633-022-02042-6

Cited by 9 publications

(5 citation statements)

References 41 publications

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“…Amongst several coating deposition method, the electroless technique has been well accepted by industries due to the deposit uniformity, enhanced tribological behaviour and corrosion resistance [1]. In a quest to attain improved properties nano-composite electroless nickel coatings have been also investigated recently [2,3]. ENB coatings are the wear resistant variants in the electroless family and are used in automotive ball joint assembly, pistons, valves, greaseless armaments, tunnel thrusters, pumps, propellors, etc [1].…”

Section: Introductionmentioning

confidence: 99%

“…ENB deposits show improved surface hardness, friction and wear behaviour on aluminium substrate along with enhanced adhesion [05,23]. In fact, one of the primary advantage of EN coatings is the ability to surface engineer a wide variety of substrates i.e., magnesium, aluminium, steel, etc to improve its tribological behaviour and enhanced corrosion resistance [2,3,5,14,23,24].…”

Section: Introductionmentioning

confidence: 99%

“…Highest thickness of 19.47, 28.20 and 30.01 μm is achieved for 85 °C, 90 °C and 95 °C respectively. The fact that the coating is deposited for the same amount of time(2…”

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confidence: 99%

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Development of Ni-B electroless coating from stabilizer free bath and characterization of high temperature tribological behaviour, scratch and corrosion resistance

Agrawal¹,

Mukhopadhyay²

2022

Surf. Topogr.: Metrol. Prop.

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The current work investigates the effects of variation of coating bath temperature on friction and wear behaviour of electroless Ni–B (ENB) coatings developed from stabilizer free bath. Coating is applied to specimens made up of AISI 1040 steel. Coatings were deposited at three different coating bath temperatures (85°C, 90°C and 95°C). Field emission scanning electron microscopy, inductively coupled plasma-optical emission spectrometer, and X-ray diffraction were used to characterize the coating for surface morphology, chemical composition, and phase structure respectively. Pin-on-disc tribo-tester was used to estimate the friction and wear behaviour of ENB coatings at room temperature (25ºC), 100ºC, 200ºC and 300ºC. The coefficient of friction was higher at high temperature due to higher roughness of the coatings obtained from stabilizer free bath, adhesion and ploughing. The wear rate at 200°C or 300°C was lower compared to 100°C. Additionally, the ENB coatings were subjected to thermogravimetric analysis which reveals higher thermal stability of coatings obtained at 95°C. A scratch tester at constant (6 N) and progressive load (5-24 N) was used to estimate the coatings scratch hardness and adhesion. The corrosion behaviour of ENB coatings in 3.5 % NaCl was studied using potentiodynamic polarization tests. The Ni-B coated specimens could efficiently provide barrier protection to steel substrate. But the corrosion potential was lower compared to lead stabilized bath.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of Ni-B electroless coating from stabilizer free bath and characterization of high temperature tribological behaviour, scratch and corrosion resistance

Agrawal¹,

Mukhopadhyay²

2022

Surf. Topogr.: Metrol. Prop.

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“…The Ni–B/Ni–P coating had the highest I corr value because the cauliflower‐like spherical grain structure of the Ni–B inner layer caused a high electrochemical potential gap between Ni–B and Ni–P in the duplex coating layer, which results in a higher galvanic corrosion risk. Uppada et al [ 38 ] reported similar corrosion results to Ni–P–Al 2 O 3 /Ni–P–SiC duplex coatings on a mild steel substrate. In this study, the Ni–B coating had a very compact microstructure with homogeneous grain size (Figure 2a–d) and outperformed the duplex Ni–B/Ni–P coating in corrosion resistance.…”

Section: Resultsmentioning

confidence: 78%

The Electroless Monolayer and Duplex Ni–B and Ni–P Coatings for 316L Stainless Steel in Synergistic Combination of Mechanical (Wear) and Chemical (Corrosion) Processes

Mindivan

Bayram

2023

Adv Eng Mater

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Wear and corrosion are old and well-known problems in many engineering applications. Therefore, steelmakers used various methods to improve both the wear and corrosion properties of steel under service conditions. It is an expensive method to manufacture the entire part from high wear-and corrosion-resistant materials. Wear and corrosion are surface damages; therefore, a suitable surface modification technique extends the service life of steels with both low cost and ease of mass production. [1] AISI 316L austenitic stainless steels exhibit excellent corrosion resistance with their austenitic microstructure and chromium oxide film layer on their surfaces in many aqueous and atmospheric environments. Because of these characteristics, they were widely used in a variety of industries, including food processing equipment (boiling pans, mashed tomato tanks, milk transport materials, oven parts), household appliances (forks, spoons), aerospace (aircraft exhaust chimneys, jet engine parts, pump parts), and chemical industry (pressurized containers), military applications, automotive industry, turbine blades, heat exchangers, railway cars, antennas, cold vessels, rain gutters, marine applications, biomedical applications (surgical implantology and surgical instruments), nuclear power plants (construction of primary circuit components), and important structural materials for indoor components. Stainless steels are known for their good corrosion resistance, but corrosion resistance may decrease in aggressive environments with sulfur, chloride, or other anions compared to homogeneous corrosion against local corrosive attacks such as stress corrosion, intergranular corrosion, and pitting corrosion. In addition, its usage areas are limited due to low hardness, poor wear and fatigue resistance, and a high "density/mechanical properties" ratio. As a result, various surface treatments can broaden the applications of 316L-type stainless steels. [2,3] In recent years, surface modification processes have been carried out on steel surfaces by electroless coating processes. Electroless coating technology, since its inception by Brenner and Riddell (1946), has been an autocatalytic process with a

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“…This has led to the development of various novel duplex and multilayer coating systems for an array of applications, both current and future. Latest investigations are primarily dedicated towards duplex coatings, such as Ni-P/Ni-B [16][17][18][19], Ni-P/Ni-W-P [20,21], Ni-P/Ni-Mo-P [22][23][24], and Ni-P-Al 2 O 3 /Ni-P-SiC [25]. These coatings have shown improvements in microhardness, friction performance, wear resistance, and corrosion resistance.…”

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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Influence of Heat Treatment on Crystal Structure, Microhardness and Corrosion Resistance of Bilayer Electroless Ni-P-SiC/Ni-P-Al2O3 Coatings

Cited by 9 publications

References 41 publications

Development of Ni-B electroless coating from stabilizer free bath and characterization of high temperature tribological behaviour, scratch and corrosion resistance

Development of Ni-B electroless coating from stabilizer free bath and characterization of high temperature tribological behaviour, scratch and corrosion resistance

The Electroless Monolayer and Duplex Ni–B and Ni–P Coatings for 316L Stainless Steel in Synergistic Combination of Mechanical (Wear) and Chemical (Corrosion) Processes

Tribological behavior of autocatalytic Ni-P based duplex coatings

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