Sacrificial Anode Cathodic Protection Allied Corrosion
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Sacrificial Anode Cathodic Protection
Metal structures exposed to the environment will corrode over time.
Sacrificial Anode Cathodic Protection is a method of mitigating corrosion to these important structures.
Refineries – Storage Tanks – Bridges – Pipelines – Oil Platforms – Ships
Scene 3: (Underground view of a Cathodic Protection System for a Pipeline. This scene focuses on introducing the components of a Cathodic Protection System.)
Cathode: In a Cathodic Protection System, the Cathode is the metal structure that we want to mitigate corrosion on.
Soil: The Cathode and Anode must be immersed in a medium that allows ions to flow freely – Earth or Water.
Anode: The Anode a metal that is more reactive than the Cathode, and will donate electrons to the Cathode, causing the Anode to corrode.
There must be an electrical connection between the Cathode and Anode, so that there is a return path for current flow.
Scene 4: (Same underground view of Cathodic Protection System for a Pipeline. This scene focuses on how the components of the Cathodic Protection System work together to mitigate corrosion.)
The moisture in the soil serves as the electrolyte which causes ions to move freely.
Since this is a more active metal, it’s more likely to lose electrons, as a result, corrosion begins.
Negative electrons are forced to travel from the anode to the structure.
As the electrons flow to the cathode, it creates chemical reactions which in turn help mitigate corrosion.
In Sacrificial Anode Cathodic Protection, no external current source is used. The electric potential difference between the Anode and Cathode are what causes current to flow.
The most common metals used in Sacrificial Cathodic Protection are Aluminum, Zinc and Magnesium.
The advantages of a Sacrificial Anode Cathodic Protections system are:
1 – No external electrical current is required
2 – It is easy to install
3 – Is it less expensive to install than other types of Cathodic Protection systems
The disadvantages of a Sacrificial Anode Cathodic Protection system are:
1 – Anode current is uncontrollable, making it more difficult ensure protection throughout the entire metal structure
2 – It requires frequent monitoring and replacement of anodes.
Need cathodic protection expertise or materials to protect your structure?
Allied Corrosion, Inc. offers a complete range of cathodic protection, corrosion control and pipeline integrity solutions.
How do lithium ion batteries work? cobalt oxide – manganese – anode – cathode
JAES is a company specialized in the maintenance of industrial plants with a customer support at 360 degrees, from the technical advice to maintenance, until final delivery of the industrial spare parts.
Rechargeable and lightweight, Lithiumion batteries have changed our lives on the way we communicate, move and work. Let’s see how they were born and how they work.
These batteries have revolutionized the way of storing energy since the early nineties.
The real protagonist is LITHIUM, this metal is the lightest solid element in nature. Pure lithium is unstable, but more common is a positively charged lithium ion, formed by the release of an electron. Thanks to the positive charge of this particle, this batteries can be recharged over and over without reducing efficiency.
To understand how battery works, first it is important to remember how this great invention was discovered
In the 1970s, as the world was affected by the oil crisis and was looking for alternative sources of energy, Stanley Whittingham was working in the energy field at Exxon and he was researching solutions to the problem of energy storage inside rechargeable batteries. The British researcher was immediately struck by the ability of lithium to easily donate electrons and his studies led him to use metal lithium as the anode of a battery, that is the negative electrode from which electrons move. Instead as the cathode Whittingham used a material made of titanium disulfide, a compound that can stored lithium ions inside.
Whittingham’s battery worked like this: the lithium ions and electrons moved from the anode to the cathode with titanium disulfide, then they were brought back when the battery was charged.
The only problem with this battery was the lithium metal used in the anode which caused explosions. Even if some changes were made, Whittingham’s work was discontinued due to the oil price fall.
During the 1980s, the American chemist John Goodenough, realized that by changing the cathode’s constitution it would be possible to increase the power of the batteries: by replacing the titanium disulfide with cobalt oxide and he discovered they generated 4volts, twice the power of Whittingham’s batteries.
The need for lighter and more powerful batteries gave the necessary impulse to research.
Akira Yoshino, considered the third protagonist of the evolution of lithium batteries, thought of using petroleum coke for the construction of the anode material to house the lithium ions, in a similar way to what has been done by cobalt oxide in the cathode.
The result was a stable, lightweight and safe product, ready to become a commercial product, in fact these advances allowed Sony and Asahi Kasei to start selling these batteries since 1991.
As we have previously described, the main feature of a lithium ion battery is the composition of its anode and cathode. There are many types of lithium ion batteries, each with different characteristics and applications: for example, cobalt oxide lithium batteries are specific for smartphones and laptops, they are formed by a cobalt oxide cathode and a graphite anode.
In the automotive sector, on the other hand, for cars with electric engines there is a particular chemical composition for its batteries: lithium, nickel, manganese and cobalt. With this composition the battery charge is optimized and maximum energy is provided, furthermore thanks to the nickel the battery obtains a high specific energy, while the manganese microcrystals form a threedimensional structure that favors the flow of electrons, reducing the electrical resistance and allowing a control of the current, this because electrons pass through microscopic channels; this structure looks like a grid of crystals.
This type of batteries can have different cathode combinations: 111 wherein a part of nickel, a part of manganese and a part of cobalt are present, or 532. In order to cut costs, battery manufacturers are trying to reduce cobalt in favor of nickel // Because of the high cost of cobalt, battery manufacturers are trying to replace it in favor of nickel.
hóa chất nhuộm đen nhôm không cần anode
Silver Cell Anode Filters Recovery and Refining Part 1
Synthetic vs Natural Anode – Which is Better? (Deep Dive)
The Talga and Novonix videos lead to the obvious question: Which is better, synthetic or natural anode? In this video, I answer that question by doing a deep dive into what the research says. The answer is nuanced.
Battery Bulletin on Twitter: https://twitter.com/BatteryBulletin
Battery Bulletin YouTube Channel: https://www.youtube.com/channel/UChu3xDdoIOnGHCcuJCjcDxg
1:17 Dahn Paper
7:29 Oak Ridge Paper
11:35 Dahn vs Oak Ridge
12:20 Synthetic vs Natural Production
14:00 Ulm Paper
16:29 Putting it all Together
17:22 Loose Ends
19:19 Key Takeaways
20:10 Novonix vs Talga Final Points
Talga Novonix BattChat BatteryTwitter
Intro Music by Dyalla: Homer Said
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