Abstract
Inconel 625 (IN 625) is widespread in the manufacturing of critical components such as nuclear reactors, control rods, steam turbines, supercritical boilers, rotary shafts, aerospace engines, etc., that operate in severe harsh environments. However, if the service environments consist of sulphur (fuel tanks), chlorine (supercritical boilers and heavy water plants), H2S, HCl, etc., this alloy will suffer from localized corrosion attacks that minimize its resistance towards corrosion, followed by sudden failure. This study is aimed to facilitate the anti-corrosion characteristics of IN 625 by cladding it with Colmonoy 5 (NiCrSiFeB) alloy particles. The clad microstructure was revealed by micrographs captured by means of optical and field emission scanning electron microscopy followed by the nanoindentation study to analyze the hardness offered. Corrosion testing was carried out on both IN 625 and Colmonoy 5 clad samples at various intervals (0, 13, 27 and 56 h) for interrogating the corrosion behavior in terms of Tafel and impedance plots along with the surface roughness examination using scanning probe microscopy. The results showed that the clad region consists of dendritic microstructure along with the segregation of interdendritic Cr-rich precipitates after solidification. These interdendritic precipitates aid in improving the hardness at the clad region. Moreover, the clad samples have better anti-corrosion characteristics because of the existence of dendritic and interdendritic phases compared to the IN 625 samples in terms of current density, polarization resistance and average surface roughness values.
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Research ethics: Not applicable.
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Author contributions: Chen Ming Chu: conceptualization, methodology, data curation, investigation. Jeyaprakash Natarajan: visualization, investigation, writing - original draft preparation. Che-Hua Yang: visualization, funding, software, validation, writing - reviewing and editing. Mohan Ekambaram: software, validation, writing - reviewing and editing.
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Competing interests: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: The raw data can be obtained on request from the corresponding author.
References
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- News
- DGM – Deutsche Gesellschaft für Materialkunde
Articles in the same Issue
- Frontmatter
- Editorial
- Additive manufacturing and allied technologies
- Original Papers
- Influence of process parameters on ageing and free vibration characteristics of fiber-reinforced polymer composites by fusion filament fabrication process
- 3D biomimetic scaffold’s dimensional accuracy: a crucial geometrical response for bone tissue engineering
- Investigation of mechanical and microstructure properties of metal inert gas based wire arc additive manufactured Inconel 600 superalloy
- Study on the influence of surface roughness on tensile and low-cycle fatigue behavior of electron beam melted Ti‐6Al‐4V
- Effect of tool pin profile on the heat generation model of the friction stir welding of aluminium alloy
- Effect of clamping position on the residual stress in wire arc additive manufacturing
- Effect of welding speed on butt joint quality of laser powder bed fusion AlSi10Mg parts welded using Nd:YAG laser
- Mechanical behaviour, microstructure and texture studies of wire arc additive manufactured 304L stainless steel
- Evolution of microstructure and properties of CoCrFeMnNi high entropy alloy fabricated by selective laser melting
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- The influence of rheology in the fabrication of ceramic-based scaffold for bone tissue engineering
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- Desirability function analysis approach for optimization of fused deposition modelling process parameters
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- Rapid tooling of composite aluminium filled epoxy mould for injection moulding of polypropylene parts with small protruded features
- Investigation of microstructural evolution in a hybrid additively manufactured steel bead
- Fused filament fabricated PEEK based polymer composites for orthopaedic implants: a review
- Design of fixture for ultrasonic assisted gas tungsten arc welding using an integrated approach
- Effect of post-processing treatment on 3D-printed polylactic acid parts: layer interfaces and mechanical properties
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- DGM – Deutsche Gesellschaft für Materialkunde