Effect of Pretreatment Process on the Adhesion and Corrosion Resistance of Nickel-Boron Coatings Deposited on 8620H Alloy Steel

Cheng, An-Yu; Sheu, Hung‐Hua; Liu, Yih-Ming; Hou, Kung-Hsu; Hsieh, Pei-Yi; Ger, Ming-Der

doi:10.20964/2020.01.22

Cited by 11 publications

(10 citation statements)

References 22 publications

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“…The coating thickness was approximately 16.7 ± 2.82 µm, with pits up to 21.6 µm. This is because the high surface roughness increased the number of nucleation points in the coating, thus increasing the coating thickness [33]. Figure 5c shows the section morphology of the Ni-P-SiC coating pretreated by polishing.…”

Section: Section Morphology and Element Analysismentioning

confidence: 99%

Influence of Element Penetration Region on Adhesion and Corrosion Performance of Ni-Base Coatings

Shen

Chen

et al. 2020

Coatings

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In this study, Ni–P/Ni–P–SiC coatings were prepared on pretreated 45 steel substrates by scanning electrodeposition. Prior to the electrodeposition, the substrates were subjected to two types of pretreatments: polishing and sandblasting. The 3D morphology of the pretreated substrates was characterized by laser scanning confocal microscopy. The micromorphology and section morphology of the coating surface were characterized by field emission scanning electron microscopy. The section element composition was characterized using an EDS energy spectrum analyzer. The adhesion and corrosion resistance of 15 coatings were analyzed using an automatic scratch tester and CS350 electrochemical workstation. The results showed the presence of an element penetration region between the coating and the substrate. The sandblasting pretreatment and SiC nanoparticle addition helped widen the penetration region of the elements. The Ni–P–SiC coating prepared by scanning electrodeposition on the sandblasted substrate exhibited the thickest penetration region, up to 28.39 µm. A scratch test conducted on this coating showed that it exhibits the best adhesion force, up to 36.5 N. In electrochemical corrosion experiments, its corrosion potential was found to be the highest, reaching −0.30 V, and the corrosion current density was the lowest, reaching 8.45 × 10−7 A·cm−2. The presence of the element penetration region increased the coating adhesion and improved the corrosion resistance.

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Section: Section Morphology and Element Analysismentioning

confidence: 99%

Influence of Element Penetration Region on Adhesion and Corrosion Performance of Ni-Base Coatings

Shen

Chen

et al. 2020

Coatings

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“…Several discontinuities [22]. It has been reported that the Ni-B coatings deposited on the 8620H steel substrates carried out with sandblasting by emery powders had the best adhesion strength and corrosion resistance [24].…”

Section: Introductionmentioning

confidence: 99%

Effect of Grit Blasting and Polishing Pretreatments on the Microhardness, Adhesion and Corrosion Properties of Electrodeposited Ni-W/SiC Nanocomposite Coatings on 45 Steel Substrate

Bertrand¹,

Kang²,

Ndiithi³

et al. 2021

Preprint

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In this study, grit blasting pretreatment was used to improve the adhesion and corrosion resistance and microhardness of Ni-W/SiC nanocomposite coatings fabricated using conventional electrodeposition technique. Prior to deposition, grit blasting and polishing (more commonly used) pretreatment were used to prepare the surface of the substrate and the 3D morphology of the pretreated substrates was characterized using laser scanning confocal microscopy. The coatings surface and the cross section morphology were analyzed using scanning electron microscopy (SEM). The chemical composition, crystalline structure, microhardness, adhesion, and the corrosion behavior of the deposited coatings were characterized using energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), microhardness tester, scratch tester and electrochemical workstation, respectively. The results indicated that the grit blasting and SiC addition, improved the microhardness, adhesion and corrosion resistance. The Ni-W-SiC nanocomposites pretreated by grit blasting exhibited the best adhesion strength, up to 36.5 ± 0.75 N. Its hardness was the highest and increased up to 673 ± 5.47Hv and its corrosion resistance was the highest compared to the one pretreated by polishing.

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“…Although coating technology improves the surface properties, the selection of the right choice of coating methods is often difficult as each technique possesses its own advantages and limitations. Electroplating is treated as a cost-effective technique compared to chemical vapor deposition and sputtering [55,56]. In addition, electroplating coats materials in a single processing step (with faster, repeatable, control over the thickness of coating deposits and offers coating over a large surface area), which do not require costly equipment, materials, and nonhazardous method to deposit material on the substrates [57,58].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pin Geometry and Orientation on Friction and Wear Behavior of Nickel-Coated EN8 Steel Pin and Al6061 Alloy Disc Pair

Yadav¹,

Lakshmikanthan²,

Ranganath

et al. 2022

Advances in Materials Science and Engineering

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Most mechanical systems (in particular, gear transmission system) undergo relative motion which results in increased friction phenomenon (friction coefficient, stresses, and wear rate) and thereby results in loss of efficiency. Mechanical parts undergo relative motion in different geometry configurations and orientations that induce a different state of stress as a result of friction. Till date, attempts are being made to minimize the friction with full sphere pin geometry configuration. The present work focused to reduce the frictional and wear rate, and experiments are conducted with tribo-pairs. i.e., nickel-coated pin surface slide against Al6061 alloy disc. The friction studies are carried out at different loads and geometries of pin surfaces (sphere and hemisphere configured at different orientations such as full sphere and hemisphere configured at 0°, 45°, and 90°) to induce different stress states with reference to sliding directions. Change in the geometry of EN8 pin material and their orientation with reference to sliding direction resulted in a different state of stress. The resulting stress levels were examined under the scanning electron microscope, which revealed the mechanisms of adhesion, abrasion, and extrusion. At a lower magnitude of orientation and load, the extent of asperity breaking lessens and material removal from pin surface decreases. Abrasion wear mechanism was observed corresponding to full sphere configuration on Al 6061 disc, whereas adhesive wear mechanisms are seen with hemisphere pins. The amount of aluminum transfer on pin surface with a hemisphere pin is comparatively more than that of full sphere configuration. At a lower magnitude of state of stress, the mechanism of sliding was dominated by the adhesion effect. At a higher level of state of stress, the mechanism of sliding was dominated by abrasion and extrusion.

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Effect of Pretreatment Process on the Adhesion and Corrosion Resistance of Nickel-Boron Coatings Deposited on 8620H Alloy Steel

Cited by 11 publications

References 22 publications

Influence of Element Penetration Region on Adhesion and Corrosion Performance of Ni-Base Coatings

Influence of Element Penetration Region on Adhesion and Corrosion Performance of Ni-Base Coatings

Effect of Grit Blasting and Polishing Pretreatments on the Microhardness, Adhesion and Corrosion Properties of Electrodeposited Ni-W/SiC Nanocomposite Coatings on 45 Steel Substrate

Effect of Pin Geometry and Orientation on Friction and Wear Behavior of Nickel-Coated EN8 Steel Pin and Al6061 Alloy Disc Pair

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