Corrosion resistance of TiN and MoN coated grey cast iron in acid solutions

Łunarska, E.

doi:10.1002/maco.19970480205

Cited by 6 publications

(4 citation statements)

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“…The region of cathodic potentials close to the corrosion potential contains information about the cathodic process occurring at the electrode and the anodic dissolution process [84]. The coefficient, b a , calculated for the anodic curves according to Equation ( 4) is between 0.21 and 2.5 V, while from the extrapolation of the Tafel sections, the coefficient, b a , for the anodic curves is between 0.17 and 0.58 V, indicating a significant role of diffusion in the corrosion kinetics, which may be due to the formation of oxide and oxonitride films of the respective metals on the surface of Cr-CrN, Ti-TiN, Zr-ZrN, and Mo-MoN coatings as reported in the literature [32,35,[38][39][40][41][42][43][52][53][54][55]. The values of the cathode Tafel coefficient (b c ) and anode Tafel coefficient (b a ) are significantly higher than the same Tafel coefficient with electrochemical kinetics [93].…”

Section: Resultssupporting

confidence: 53%

“…At the same time, the introduction of Mo into the CrN coating improves its corrosion resistance compared to the uncoated sample and the sample with the CrN coating containing no molybdenum [65]. Good corrosion protection was provided by the (Mo,Ti)N coating [55].…”

Section: Introductionmentioning

confidence: 98%

“…The MoN coating has been considered an anticorrosion coating much less often [54,55]. In particular, the MoN coating was found to have a lower tendency to crack but a higher susceptibility to degradation under the influence of H 3 PO 4 and H 2 SO 4 solutions compared to the TiN coating [55].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the Mechanical Properties and Corrosion Resistance of the Cr-CrN, Ti-TiN, Zr-ZrN, and Mo-MoN Coatings

Zhylinski

Vereschaka

et al. 2023

Coatings

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In this work, the mechanical properties and corrosion resistance of Cr-CrN, Ti-TiN, Zr-ZrN, and Mo-MoN coatings deposited by the physical vapor deposition (PVD) method on Ti-6Al-4V alloy were compared. The phase composition of the coatings, their hardness and fracture resistance in scratch tests were determined, and their structural characteristics were also studied using a scanning electron microscope (SEM) and a transmission electron microscope (TEM). The diffraction spectra were made using an automatic X-ray diffractometer. The value of the adhesive component of the friction coefficient fadh of the pair “coated and uncoated Ti-6Al-4V alloy” was investigated in the temperature range of 20–900 °C. The lowest value of fadh was detected for the Zr-ZrN coating at temperatures below 400 °C, while for the Mo-MoN coating it was observed at temperatures above 700 °C. The polarization curves of the coated and uncoated samples were performed in a 3% aqueous NaCl solution. The level of corrosion of the Ti-6Al-4V alloy samples with Cr-CrN, Ti-TiN, Zr-ZrN, and Mo-MoN coatings was evaluated using the Tafel extrapolation method, the iteration method, and the polarization resistance method. The results obtained with these methods indicate that the Zr-ZrN coated sample has the best corrosion resistance in the 3 wt.% NaCl solution, with a corrosion current density of 0.123 μA/cm2.

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Section: Resultssupporting

confidence: 53%

Section: Introductionmentioning

confidence: 98%

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Comparison of the Mechanical Properties and Corrosion Resistance of the Cr-CrN, Ti-TiN, Zr-ZrN, and Mo-MoN Coatings

Zhylinski

Vereschaka

et al. 2023

Coatings

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“…Das kann derzeit für Gusseisenwerkstoffe bei weitem nicht genutzt werden. Die Ursachen hierfür liegen in der defektbehafteten Schichtausbildung aufgrund des freiliegenden Oberflächengraphits und der daraus resultierenden schlechten Schichthaftung . Ein weiterer limitierender Faktor ist die ungenügende Abstützung der dünnen harten Schichten in Bereichen oberhalb des weichen Graphits, insbesondere nach der Hartstoffbeschichtung .…”

Section: Einleitung Und Zielstellungunclassified

Potenziale von ausgewählten Randschichtbehandlungsverfahren sowie deren Kombinationen zur Verbesserung des Verschleiß- und Korrosionsverhaltens von Gusseisenwerkstoffen

Buchwalder

Zenker

Fritzsch

et al. 2015

Mat.-wiss. u. Werkstofftech

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Die typischen hohen C-und Si-Gehalte von Gusseisenwerkstoffen und der weiche Graphit limitieren die Behandel-und Beanspruchbarkeit nach dem Nitrieren und der Hartstoffbeschichtung. Wenn die Gusseisenoberfläche vor den genannten Randschichtbehandlungen mittels Elektronstrahls umgeschmolzen wird (Kombinationsbehandlung) und eine harte, graphitfreie ledeburitische Randschicht gebildet wird, dient diese als Stützschicht für die harte und dünne Verbindungs-bzw. Hartstoffschicht.Vergleichende Verschleißtests (Stift-Scheibe) zeigten, dass bei geringen Lasten die Verschleißrate aller Einzel-und Kombinationsbehandlungen auf einem vergleichbar niedrigen Niveau wie der unbehandelte und beschichtete Grundwerkstoff liegen. Bei höheren Lasten kommt das überragende Verschleißverhalten der Kombinationsbehandlungen gegenüber den Einzelbehandlungen voll zum Tragen. Die Bildung defektfreier Randschichten nach der Kombinationsbehandlung resultiert außerdem in einer deutlichen Verbesserung der Korrosionsbeständigkeit in chloridhaltiger Lösung. Im Vergleich zum Grundwerkstoff und den Einzelbehandlungen wurden die relevanten Potenziale zu deutlich positiveren Werten verschoben.The typically high contents of carbon and silicon in cast irons as well as their soft graphite limit their treatability and load-bearing capacity for nitriding and hard coating. If an electron beam remelting process is carried out before these surface treatments, a hard ledeburitic surface layer free of graphite is produced, and serves as a supporting layer for the hard and typically thin compound layer or PA-CVD coating after combined treatments.Comparative wear tests (pin-on-disc) have shown that, especially for low loads, the wear rates of all single and duplex treatments are comparable, though considerably better than for the untreated base material. For higher loads, the superiority of Korrespondenzautor:

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Evaluation of microstructure and electrochemical behavior of dual-layer NiCrAlY/mullite plasma sprayed coating on high silicon cast iron alloy

Jam

Derakhshandeh

Rajaei

et al. 2017

Ceramics International

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Corrosion resistance of TiN and MoN coated grey cast iron in acid solutions

Cited by 6 publications

References 6 publications

Comparison of the Mechanical Properties and Corrosion Resistance of the Cr-CrN, Ti-TiN, Zr-ZrN, and Mo-MoN Coatings

Comparison of the Mechanical Properties and Corrosion Resistance of the Cr-CrN, Ti-TiN, Zr-ZrN, and Mo-MoN Coatings

Potenziale von ausgewählten Randschichtbehandlungsverfahren sowie deren Kombinationen zur Verbesserung des Verschleiß- und Korrosionsverhaltens von Gusseisenwerkstoffen

Evaluation of microstructure and electrochemical behavior of dual-layer NiCrAlY/mullite plasma sprayed coating on high silicon cast iron alloy

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