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Related Concept Videos

Corrosion of Reinforcement01:27

Corrosion of Reinforcement

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The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
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Corrosion02:49

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The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
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Preemptive Thermochromic Smart Coating for Visual Friction Damage Recognition and Corrosion Protection in Offshore

Zhengsen Wang1, Kang Liu1, Wanting Xu1

  • 1Shandong Key Laboratory of Special Epoxy Resin, College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|March 3, 2026
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Summary

A new smart coating visually detects friction-induced heating in steel cables, preventing damage. This thermochromic coating offers early warning for offshore energy systems, enhancing safety and reliability.

Keywords:
corrosion protectionfriction monitoringnon‐destructive testingsandwich structurethermochromic microcapsules

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Area of Science:

  • Materials Science
  • Corrosion Science
  • Tribology

Background:

  • Offshore steel cables degrade from friction wear and marine corrosion.
  • Detecting sub-surface micro-damage for early warning is challenging.

Purpose of the Study:

  • Develop a smart coating for preemptive visual detection of frictional heating.
  • Enhance safety and reliability of offshore energy systems.

Main Methods:

  • Created a sandwich-structured thermochromic smart coating.
  • Integrated silica-encapsulated thermochromic microcapsules (TC@SiO2) with CVL, BPA, and n-hexadecanol.
  • Coating comprises polyurea (top) and epoxy (bottom) matrices.

Main Results:

  • Frictional heating triggers color fading via solid-liquid phase transition and chromophore disruption.
  • Coating shows superior tribological performance (5.86 × 10⁻⁵ mm³ N⁻¹ m⁻¹).
  • Demonstrates long-term corrosion resistance (5.144 × 10⁹ Ω·cm² after 70 days).

Conclusions:

  • The smart coating provides a cost-effective, intuitive strategy for early friction monitoring.
  • Offers a new paradigm for intelligent protection of marine structural materials.
  • Visual detection of frictional heating prevents irreversible damage.