Imperial College London
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DrStellaPedrazzini

Faculty of Engineering, Department of Materials

Senior Lecturer
 
 
 
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Contact

 

s.pedrazzini Website

 
 
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Location

 

1.18Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Pek:2023:10.1007/s11085-022-10142-2,
author = {Pek, ME and Ackerman, AK and Appleton, M and Ryan, MP and Pedrazzini, S},
doi = {10.1007/s11085-022-10142-2},
journal = {Oxidation of Metals},
pages = {3--13},
title = {Development of a novel, impurity-scavenging, corrosion-resistant coating for Ni-based superalloy CMSX-4},
url = {http://dx.doi.org/10.1007/s11085-022-10142-2},
volume = {99},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Sulfur, a common impurity arising from atmospheric and environmental contamination, is highly corrosive and detrimental to the lifespan of nickel superalloys in jet engines. However, sulfur-scavenging coatings have yet to be explored. Our study presents the successful development of a stable, uniform, impurity-scavenging Ni-Mn coating on Ni-based superalloy CMSX-4, through electroplating. The coating was characterised via combined scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy. An optimal coating thickness of > 600 nm was deposited. The coated alloy was exposed to corrosive salt mixture 98% Na2SO4–2% NaCl at 550 °C for 100 h, mimicking engine exposure conditions, thereby proving that the coating successfully trapped sulfur and prevented its diffusion into an underlying alloy. This work presents a promising development for the prevention of sulfur-induced corrosion in industrial setting such as gas turbine engine, where the effects of sulfur diffusion into the bulk alloy could lead to premature failure.
AU  - Pek,ME
AU  - Ackerman,AK
AU  - Appleton,M
AU  - Ryan,MP
AU  - Pedrazzini,S
DO  - 10.1007/s11085-022-10142-2
EP  - 13
PY  - 2023///
SN  - 0030-770X
SP  - 3
TI  - Development of a novel, impurity-scavenging, corrosion-resistant coating for Ni-based superalloy CMSX-4
T2  - Oxidation of Metals
UR  - http://dx.doi.org/10.1007/s11085-022-10142-2
UR  - https://link.springer.com/article/10.1007/s11085-022-10142-2
UR  - http://hdl.handle.net/10044/1/101204
VL  - 99
ER  -
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