Microstructure evolution and corrosion resistance of Ni–Cu–P amorphous coating during crystallization process

Chen, Jie; Zhao, Guolong; Matsuda, Kenji; Zou, Yong

doi:10.1016/j.apsusc.2019.04.142

Cited by 51 publications

(18 citation statements)

References 46 publications

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“…Figure 15a shows that duplex coating has a higher corrosion potential than uncoated samples, indicating significant protection against corrosion. Again, the system with Ni-Cu-P as the outer layer of deposition (Coating-1) displays a passivation phase in the polarization curve, as was also reported by Chen et al [41]. This leads to the conclusion that the performance of Coating-1 is relatively better compared to the system with Ni-P as the outer layer (Coating-2).…”

Section: Corrosion Behaviorsupporting

confidence: 75%

Duplex electroless Ni-P/Ni-Cu-P coatings: Preparation, evaluation of microhardness, friction, wear, and corrosion performance

Biswas

Das

Sahoo

2022

J. Electrochem. Sci. Eng.

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The current study focuses on the development of duplex Ni-P/Ni-Cu-P coatings by the electroless deposition method. Coatings are developed on mild steel substrates with Ni-Cu-P as the outer layer and Ni-P as the inner layer and vice versa. The coated samples are heat-treated at temperatures ranging between 200 to 800 °C during 1 and 4 h. Coated samples are characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The effect of heat treatment temperature and its time duration on the hardness, friction and wear behaviour of both coatings are evaluated and compared. This would help in understanding how heat treatment influences the duplex system of coatings and helps in identifying the suitable condition of heat treatment for optimal performance of the coating. It is observed that heat treatment has a positive influence over the coating performance, which is the best when treated under optimal temperature and time duration conditions. The corrosion behaviour of the coatings is also assessed with the help of electrochemical techniques, viz. potentiodynamic polarization and electrochemical impedance spectroscopy. The results show that the duplex coatings can provide substantial protection to the mild steel substrates. Heat treatment is also found to have a significant influence on the corrosion behaviour of duplex coatings.

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Section: Corrosion Behaviorsupporting

confidence: 75%

Duplex electroless Ni-P/Ni-Cu-P coatings: Preparation, evaluation of microhardness, friction, wear, and corrosion performance

Biswas

Das

Sahoo

2022

J. Electrochem. Sci. Eng.

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“…Recently, Ni-based coatings have been widely used for preventing corrosion damage on substrates, Tang et al 2 fabricated a Ni-Co coating by electroplating, which effectively improved the corrosion resistance of X65 steel in a sweet (CO 2 ) corrosion environment. Chen et al 3 prepared a Ni-Cu-P coating by electroless plating, which showed better corrosion performance than low-carbon steel in a 3.5 wt% NaCl solution. Jime´nez et al 4 demonstrated that a thermal-flamesprayed Ni-Tec coating had a lower corrosion current and more positive corrosion potential than gray cast iron.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviors and electrochemical mechanisms of laser-cladded NiCrAlMo/nano-CeO₂ composite coatings in chloride-enriched environments

Chen

Wang

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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Q235 steel is a low-cost material widely applied in modern industrial constructions. However, electrochemical degradation is the main drawback for its applications in chloride-enriched environments. To address this problem, NiCrAlMo and NiCrAlMo + 2 wt% nano-CeO2 composite coatings were laser-cladded on Q235 steel substrates. Characterization methods were used to investigate the microstructures, corrosion behaviors, and electrochemical mechanisms of the obtained coatings. The results showed that adding nano-CeO2 is conductive for removing residual gas pores and for refinement of grains, effectively improving the passive and electrochemical properties of the NiCrAlMo coating in both chloride-enriched solutions. Furthermore, the NiCrAlMoCeO2 composite coating exhibits a significantly reduced icorr of 0.4919 µA cm2 and an increased resistance ( Rp) of 175,310 Ω cm2 in a neutral solution, demonstrating the good anti-corrosion properties for its application in marine engineering structures.

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“…4 Cu incorporated in EN coating enhances its brightness/smoothness, thermal and paramagnetic stability, and anti-corrosion properties. [5][6][7][8] Cu into EN coating prompts to decrease the nodule size, and the coating appears to be smooth and lustrous compared to the conventional Ni-P coating. 9 Moreover, Cu represses Ni reduction, which reduces the coating deposition rate.…”

Section: Introductionmentioning

confidence: 99%

Effect of copper incorporation on phase transformation behavior of electroless nickel–phosphorous coating and its effect on the tribological behavior

Biswas

Das

Sahoo

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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The microstructural changes of electroless Ni–P–Cu coating at various heat-treatment conditions are investigated to understand its implications on the tribological behavior of the coating. Coatings are heat-treated at temperatures ranging between 200°C and 800 °C and for 1–4 h duration. Ni–P–Cu coatings exhibit two-phase transformations in the temperature range of 350–450 °C and the resulting microstructural changes are found to significantly affect their thermal stability and tribological attributes. Hardness of the coating doubles when heat-treated at 452 °C, due to the formation of harder Ni3P phase and crystalline NiCu. Better friction and wear performance are also noted upon heat treatment of the coating at the phase transformation regime, particularly at 400 °C. Wear mechanism is characterized by a mixed adhesive cum abrasive wear phenomena. Heat treatment at higher temperature (600 °C and above) and longer duration (4 h) results in grain coarsening phenomenon, which negatively influences the hardness and tribological characteristics of the coating. Besides, diffusion of iron from the ferrous substrate as well as greater oxide formation are noticed when the coating is heat-treated at higher temperatures and for longer durations (4 h).

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Microstructure evolution and corrosion resistance of Ni–Cu–P amorphous coating during crystallization process

Cited by 51 publications

References 46 publications

Duplex electroless Ni-P/Ni-Cu-P coatings: Preparation, evaluation of microhardness, friction, wear, and corrosion performance

Duplex electroless Ni-P/Ni-Cu-P coatings: Preparation, evaluation of microhardness, friction, wear, and corrosion performance

Corrosion behaviors and electrochemical mechanisms of laser-cladded NiCrAlMo/nano-CeO₂ composite coatings in chloride-enriched environments

Effect of copper incorporation on phase transformation behavior of electroless nickel–phosphorous coating and its effect on the tribological behavior

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Microstructure evolution and corrosion resistance of Ni–Cu–P amorphous coating during crystallization process

Cited by 51 publications

References 46 publications

Duplex electroless Ni-P/Ni-Cu-P coatings: Preparation, evaluation of microhardness, friction, wear, and corrosion performance

Duplex electroless Ni-P/Ni-Cu-P coatings: Preparation, evaluation of microhardness, friction, wear, and corrosion performance

Corrosion behaviors and electrochemical mechanisms of laser-cladded NiCrAlMo/nano-CeO2 composite coatings in chloride-enriched environments

Effect of copper incorporation on phase transformation behavior of electroless nickel–phosphorous coating and its effect on the tribological behavior

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Corrosion behaviors and electrochemical mechanisms of laser-cladded NiCrAlMo/nano-CeO₂ composite coatings in chloride-enriched environments