| Issue |
EPJ Web Conf.
Volume 375, 2026
Recent Technologies and Innovations in Electronics and Photonics (RTEP-2026)
|
|
|---|---|---|
| Article Number | 03004 | |
| Number of page(s) | 11 | |
| Section | Emerging Interdisciplinary Research and Applications | |
| DOI | https://doi.org/10.1051/epjconf/202637503004 | |
| Published online | 26 June 2026 | |
https://doi.org/10.1051/epjconf/202637503004
Superior corrosion resistance due to enhanced hydrophobic properties in DMR-249A Naval Steel by high phosphorous content of electroless NiP (ENP) coatings
1 Department of Mechanical Engineering, Defence Institute of Advanced Technology, Girinagar, Pune, 411025, India
2 Department of Applied Physics, Defence Institute of Advanced Technology, Girinagar, Pune, 411025, India
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 26 June 2026
Abstract
DMR-249A is the low-alloy steel developed by DMRL for the construction of Indian Navy ships and submarines, with high mechanical resilience but prone to corrosion. In this study, the DMR-249A steel was coated with low, medium, and high Electroless Nickel-Phosphorous (ENP) coatings. The coating surface morphology alongwith surface roughness, hardness, wear resistance, AFM, SEM, and EDAX, was analysed. The surface water affinity was obtained through contact angle measurements. Corrosion resistance was quantified using polarization, electrochemical impedance spectroscopy, and salt spray tests. The results show enhanced hydrophobic behaviour and corrosion resistance with increased phosphorous content as a result of the formation of an amorphous ENP layer. This amorphous layer acts as an effective barrier against seawater ingress, thereby arresting corrosion in naval ships and submarines.
© The Authors, published by EDP Sciences, 2026
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