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Related Concept Videos

Corrosion02:49

Corrosion

28.1K
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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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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Zones of Protection01:16

Zones of Protection

766
In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
766
Protection of Alcohols02:31

Protection of Alcohols

8.0K
This lesson delves into the concept of protection and deprotection of a functional group fundamental to synthetic organic chemistry. These phenomena are explained in the context of aliphatic and aromatic alcohols.
Protection
It defines a protecting group as the masking agent to make the more reactive species inert to a given set of conditions. This concept is depicted via the illustration of liquid flow through different outlets in an assembly of pipes. The analogy helps to understand the role...
8.0K
Protecting Self-Esteem01:27

Protecting Self-Esteem

201
Self-esteem, a central component of psychological well-being, is actively maintained through various cognitive and behavioral strategies. Individuals employ specific mechanisms to preserve a positive self-concept and mitigate threats to their self-worth, particularly in contexts involving social evaluation or personal feedback. Four primary techniques are commonly used to sustain self-esteem.Manipulating AppraisalsOne prominent strategy involves manipulating appraisals from others. Individuals...
201
Radial System Protection01:23

Radial System Protection

424
Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
424

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Potentiodynamic Corrosion Testing
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Potentiodynamic Corrosion Testing

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Self-Healable Superomniphobic Surfaces for Corrosion Protection.

Mohammadamin Ezazi1, Bishwash Shrestha1, Nathan Klein1

  • 1Department of Mechanical Engineering , University of Kansas , Lawrence , Kansas 66045 , United States.

ACS Applied Materials & Interfaces
|July 25, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel superomniphobic surface offering superior corrosion protection. This durable, self-healing surface repels various liquids, significantly reducing corrosion rates for metals and alloys.

Keywords:
chemical durabilitycorrosion protectionepoxidized soybean oilself-healingsuperomniphobic surface

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Corrosion Engineering

Background:

  • Corrosion protection is critical for metal and alloy longevity.
  • Existing superhydrophobic surfaces struggle with low surface tension liquids and mechanical durability.
  • Limitations hinder practical applications of current protective coatings.

Purpose of the Study:

  • To develop a superomniphobic surface with extreme liquid repellency.
  • To enhance mechanical durability and self-healing capabilities of protective coatings.
  • To evaluate the corrosion protection performance against conventional methods.

Main Methods:

  • Fabrication of a novel superomniphobic surface.
  • Contact angle measurements for various liquids (high/low surface tension, acids, bases).
  • Corrosion rate testing compared to superhydrophobic coatings.
  • Mechanical damage and self-healing assessment at elevated temperatures.

Main Results:

  • The superomniphobic surface exhibited high contact angles for diverse liquids.
  • Corrosion rates were reduced to approximately 20% compared to superhydrophobic coatings.
  • The surface demonstrated autonomous repair of mechanical damage within 60 seconds at 60 °C.
  • Restoration of intrinsic corrosion protection performance after repair.

Conclusions:

  • Superomniphobic surfaces offer superior, sustainable corrosion protection.
  • The developed surface overcomes limitations of current technologies.
  • Potential applications include pipelines and reinforced concrete rust inhibition.