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Researchers at IIT Guwahati have developed an advanced epoxy-based coating designed to protect steel structures exposed to seawater and harsh marine environments, addressing a major cause of premature infrastructure degradation in coastal regions.
The team created a nanocomposite system by combining reduced graphene oxide (RGO), zinc oxide (ZnO) nanorods and the conducting polymer polyaniline (PANI) within a conventional epoxy matrix. Laboratory tests show that this formulation forms a denser, more uniform barrier than standard epoxy coatings, adheres more strongly to steel surfaces and significantly slows the ingress of chloride ions and other corrosive species.
According to the researchers, the coating maintained its protective performance over extended immersion tests in simulated seawater, indicating strong potential for long-term service in real-world conditions.
The innovation is targeted at marine and coastal infrastructure such as ports, jetties, offshore platforms, ship hulls, bridges and pipelines, where corrosion can drive up maintenance costs and pose safety risks.
IIT Guwahati says further work will focus on scaling up the formulation, evaluating field performance and assessing life-cycle benefits, with a view to eventual commercialisation in partnership with industry.
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