Related Experiment Video
Updated: Mar 31, 2026
13:21
Graphene Coatings for Biomedical Implants
Published on: March 1, 2013
21.9K
Graphene based anticorrosive coatings for Cr(VI) replacement
Karanveer S Aneja1, Sivasambu Bohm2, A S Khanna1
1Department of Metallurgical Engineering and Materials Science, IIT-Bombay, Powai, Mumbai 400076, India. kvsaneja@iitb.ac.in khanna@iitb.ac.in sivabohm@iitb.ac.in.
Nanoscale
|October 15, 2015
Summary
Researchers explored functionalized graphene as an eco-friendly alternative to traditional chromate coatings for steel. This graphene coating significantly enhances corrosion resistance, offering a sustainable solution for the steel industry.
Area of Science:
- Materials Science
- Corrosion Engineering
- Environmental Chemistry
Background:
- Chromate conversion coatings are standard pre-treatments for steel but face environmental restrictions.
- The steel industry requires cost-effective, eco-friendly alternatives without sacrificing performance.
- Hexavalent chromium (Cr(VI)) poses environmental and health risks, driving the search for substitutes.
Purpose of the Study:
- To evaluate functionalized graphene as a viable, environmentally benign anticorrosive pre-treatment for steel.
- To compare the corrosion protection efficacy of graphene coatings against traditional Cr(VI) based coatings.
- To assess the durability and corrosion performance of graphene-coated steel systems.
Main Methods:
- Graphene production via high shear liquid exfoliation.
- Functionalization of graphene to enhance barrier properties.
- Electrochemical testing to evaluate corrosion resistance.
- Coating performance assessments on steel substrates.
Main Results:
- Functionalized graphene forms a conductive and nearly impermeable barrier coating.
- Graphene coatings demonstrated a dramatic improvement in steel's corrosion resistance.
- Electrochemical evaluations confirmed enhanced anticorrosive properties.
- Coating performance tests validated the durability of the graphene system.
Conclusions:
- Functionalized graphene is a highly effective and eco-friendly anticorrosive coating for steel.
- Graphene offers a sustainable alternative to restricted Cr(VI) based pre-treatments.
- This technology addresses the industrial demand for high-performance, green corrosion protection solutions.
Related Concept Videos
02:49Corrosion
29.4K
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...
29.4K
01:24Microbial Corrosion
42
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
42
01:27Corrosion of Reinforcement
704
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...
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
704