Electroplating process/Electrodeposition: Corrosion Control

This video describes the definition of electroplating. It also describes the process of electroplating. Electroplating of copper (Cu) is explained was example. The reactions involved in the process is also explained. The two types of anode cases aware described. The factors influencing the electroplating process is also described. Applications of this process is also discussed.
Electroplating/Electrodeposition
You will be able to define electroplating.
You will be able to describe the process of electroplating with an example.
You will be able to list out the objectives of electroplating.
You will be able to discuss the factors affecting electroplating.
You will be able to enumerate the limitations of this method.
Electroplating is a process of coating a superior metal over the base metal (inferior metal) by passing direct current through the electrolyte containing the soluble salt of the coating metal.
Objectives of electroplating
To improve the corrosion resistance of the metal.
e.g- chromium and nickel coated components in automotive applications.
For the aesthetic appearance of the metals/reduce the cost.
e.g- gold covering ornaments.
To increase the thermal conductivity of the metal.
e.g- copper bottomed vessels.
To increase the tensile strength of the metals.
e.g- aluminum (Al) coatings.
Anode Coating metal (Cu) or inert metal
Cathode Article to be coated
Electrolyte CuSO4 (solution with soluble salt of coating metal)
Process (Electroplating of Copper)
When direct current is passed through CuSO4 (electrolyte), it decomposes to its ions
At cathode
Cu2+ ions gets reduced to Cu and gets deposited on the article
At anode
Case-I -Anode is the coating metal (Copper)
Copper gets oxidised to form Cu2+ ions and reacts with SO42-
Case-II -Anode is the inert metal (Pt, Graphite etc.)
Electrolyte has to be added to maintain the concentration of CuSO4.
Factors affecting electroplating
Temperature - When the temperature increases, ions diffuse faster and the amount of deposition increases.
Concentration - When the concentration increases, more number of ions are present and the amount of deposition increases.
Distance between the electrodes - When the distance increases, more energy and time is required for ions to travel and the amount of deposition decreases.
Time: When the time of electrodeposition increases, the amount of deposition increases.
Current - When the current supplied is increased, the amount of deposition increases.
Surface area of the anode - When the surface area of the anode increases, more ions gets dissolved and the amount of deposition increases.
Disadvantages of electroplating
Expensive
Requires electricity
Time consuming
Coating may be ununiform
Electroplating bath solution has to be disposed carefully, as it is prone to water pollution.

[@muthuvaithi9494]

thanks for videos...

[@RevathiPurushothaman]

Most welcome.

[@iyyappans36]

Informative, thank u mam

[@RevathiPurushothaman]

Most welcome. Keep watching.

[@neginalmasi3678]

thanks for informative videos you share

[@neginalmasi3678]

is there any lecture about cavitation or hydrogen embrittlement and also applying PE coat on pipes?

[@RevathiPurushothaman]

@@neginalmasi3678 Hydrogen embrittlement is dealt as a part of stress corrosion in my video on stress corrosion : ruclips.net/video/pnsExPkHbI0/видео.html

[@suthanprasad]

Nice presentation to understand mam

[@RevathiPurushothaman]

Glad to hear this from you.

[@sheunsays9655]

Wow it's awesome

[@RevathiPurushothaman]

Thank you very much.

[@kiranKumar-yy2fb]

Thank you madam 🙏

[@RevathiPurushothaman]

It's my pleasure

[@ChetanPatil-gk5vl]

Mam how PH affecting in electrodeposition?

[@kallappatirvir6399]

👌👌👌👌👌👌👌

[@RevathiPurushothaman]

Thank you.

[@jinsookim3027]

Prof. RP, may I ask slides of this electroplating, electroless plating and galvanic corrosion presentations?

[@RevathiPurushothaman]

I have shared in my blog.

[@sah2950]

Hello mam
Can you explain (iron carbon diagram)?

[@RevathiPurushothaman]

Sure. I will do in future.

[@foodandlifestylee]

Is this answer for corrosion control by nickel electroplating

[@RevathiPurushothaman]

This is an example for copper. Similarly it can be used for Nickel also.

[@kiranKumar-yy2fb]

Please explain nickel plating madam

[@RevathiPurushothaman]

Sure

[@foodandlifestylee]

Plz reply

[@foodandlifestylee]

.

[@Sunnie0o7]

I have to say it Ma'am your teaching is much much far better than our Cmr College staff Who are closely useless.🥲

[@vamshiporandla2145]

I'm from CMRCET 😂

[@RevathiPurushothaman]

Thank you. Please don't abuse your teachers.

[@foodandlifestylee]

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[@foodandlifestylee]

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[@foodandlifestylee]

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