Corrosion Behavior of Inconel 625 Coating Produced by Laser Cladding

Scendo, M.; Staszewska-Samson, Katarzyna; Danielewski, Hubert

doi:10.3390/coatings11070759

Cited by 25 publications

(7 citation statements)

References 26 publications

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“…A lesser k value indicates a higher corrosion resistance. [42][43][44][45] This means that the IN625 overlay has provided excellent resistance to corrosion at elevated conditions when deposited on the stainlesssteel substrate.…”

Section: Hot Corrosion Kineticsmentioning

confidence: 99%

High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate

Nachimuthu,

Gosipathala,

Arasappan

et al. 2024

Materials & Corrosion

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In elevated conditions, austenitic stainless steels suffer intense damage by corrosion because of the severe oxide scale development. Giving stainless steel a corrosion‐resistant surface coating can prevent excessive damage. In this case, welding‐based overlaying is a potential method to restore the damaged parts as it has a higher productivity rate. This investigation articulates the corrosion resistance behavior of the multiple overlapped Inconel 625 (IN625) weld overlays on the AISI 316L substrate plate. The corrosion resistance at elevated temperatures was investigated with kinetic curves, further revealing the corrosion products from the sample surface. Characterization techniques like scanning electron microscopy with energy‐dispersive spectroscopy, X‐ray diffraction, and Raman spectroscopy were employed to analyze the corrosion products. Hot corrosion kinetics in the molten salt environment (Na2SO4 + V2O5) revealed that the IN625 overlay samples gained a weight of 40.15 mg/cm2, and the substrate had a weight gain of 65.42 mg/cm2. From the hot oxidation kinetics, it is evident that the mass gained by the substrate is more than twice that of the Inconel overlay sample. Furthermore, the formation of oxides and spinel phases rich in nickel (NiO, NiCr2O4) highly influenced the corrosion kinetics of the multiple overlapped IN625 overlay sample. The AISI 316L substrate sample revealed the existence of critical oxide phases such as Fe2O3 and Cr2O3, which were lesser and did not influence the corrosion resistance at 900°C. In the present investigation, the multiple overlapped IN625 weld overlay offered excellent corrosion resistance at high temperature compared to the AISI 316L.

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Section: Hot Corrosion Kineticsmentioning

confidence: 99%

High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate

Nachimuthu,

Gosipathala,

Arasappan

et al. 2024

Materials & Corrosion

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“…Nickel-based superalloys are widely used as coating materials due to their high corrosion resistance in aggressive environments as well as because of their fatigue strength, high-temperature toughness and ductility [ 3 , 4 ]. The positive influence of Inconel 625 coatings on the corrosion resistance of various grades of low-alloy and stainless steels was reported in the publication [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

The Structure and Properties of Laser-Cladded Inconel 625/TiC Composite Coatings

2023

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This article presents production results concerning metal matrix composite-coatings made using the laser-cladding technology. The enhancement of the wear resistance of the material surface is the one of the main goals accompanying the manufacturing of composite coatings. Nickel-based superalloys are used in several industries because they are characterized by a number of desirable properties including high tensile and fatigue strength as well as resistance to high-temperature corrosion in aggressive environments. One of the most interesting materials from the group of superalloys is Inconel 625, used as a matrix material in tests discussed in this article. However, nickel-based superalloys are also characterized by an insufficient wear resistance of the surface, therefore, in relation to the tests discussed in this article, Inconel 625-based composite coatings were reinforced by adding 10%, 20% and 40% of titanium carbide particles. The addition of hard phases, i.e., TiC, WC or SiC particles can have a positive effect on the erosion resistance of cladded specimens. The aim of the experiment was to determine the impact of the titanium carbide content on the structure of the alloy and its resistance to corrosive wear, enabling the extension of the service life of Inconel 625/TiC composite coatings. The investigation included microhardness tests, corrosion resistance analysis, penetrant tests, macrostructure and microstructure analyses and X-ray diffraction (XRD) tests. The TiC particles increased the hardness of the coatings and, in general, had a negative impact on the corrosion resistance of pure Inconel 625 coatings. However, the increased homogeneity of composite coatings translated into the improvement of corrosion resistance.

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“…In our previous studies [26,27], we successfully laser cladded NiCr(Ti)-based coatings onto low carbon steel plates and electrochemically tested them in a very acidic PEMFC environment (aggressive conditions). The NiCr-based superalloy was selected as the base material due to its good corrosion resistance [28], while titanium was added as a reinforcing material into the composition (up to 10 wt% Ti addition). From the literature and applications, strong acidic solutions used as an electrolyte have a great influence on the corrosion of metallic BPs.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Coated Low Carbon Steel in a Simulated PEMFC Environment

et al. 2023

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Here, potential metallic bipolar plate (BP) materials were manufactured by laser coating NiCr-based alloys with different Ti additions on low carbon steel substrates. The titanium content within the coating varied between 1.5 and 12.5 wt%. Our present study focussed on electrochemically testing the laser cladded samples in a milder solution. The electrolyte used for all of the electrochemical tests consisted of a 0.1 M Na2SO4 solution (acidulated with H2SO4 at pH = 5) with the addition of 0.1 ppm F−. The corrosion resistance properties of the laser-cladded samples was evaluated using an electrochemical protocol, which consisted of the open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) measurements, and potentiodynamic polarization, followed by potentiostatic polarization under simulated proton exchange membrane fuel cell (PEMFC) anodic and cathodic environments for 6 h each. After the samples were subjected to potentiostatic polarization, the EIS measurements and potentiodynamic polarization were repeated. The microstructure and chemical composition of the laser cladded samples were investigated by scanning electron microscopy (SEM) combined with energy-dispersive X-ray spectroscopy (EDX) analysis.

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Corrosion Behavior of Inconel 625 Coating Produced by Laser Cladding

Cited by 25 publications

References 26 publications

High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate

High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate

The Structure and Properties of Laser-Cladded Inconel 625/TiC Composite Coatings

Corrosion Behavior of Coated Low Carbon Steel in a Simulated PEMFC Environment

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