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Galvanization is applying a coating of:
- a)Pb
- b)Cr
- c)Cu
- d)Zn
Correct answer is option 'D'. Can you explain this answer?
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Galvanization is applying a coating of:a)Pbb)Crc)Cud)ZnCorrect answer ...
Galvanization is applying a coating of: Zn
Galvanization is a process used to apply a protective coating of zinc (Zn) onto the surface of another metal. This process is commonly used to prevent corrosion and extend the lifespan of the underlying metal.
Why Zinc (Zn) is used for Galvanization:
1. Corrosion Resistance: Zinc is highly resistant to corrosion, making it an ideal choice for galvanization. When zinc is exposed to the atmosphere, it forms a protective layer of zinc oxide (ZnO) and zinc hydroxide (Zn(OH)2) on its surface. This protective layer acts as a barrier, preventing the underlying metal from coming into contact with corrosive substances such as moisture and oxygen.
2. Self-Healing: In the event that the zinc coating is scratched or damaged, zinc has the unique ability to self-heal. This means that if the underlying metal is exposed due to a small scratch or abrasion, the zinc coating will react with the surrounding atmosphere and form a new layer of protective zinc oxide, effectively sealing off the damaged area.
3. Sacrificial Protection: Zinc also provides sacrificial protection to the underlying metal. In the presence of an electrolyte, such as moisture, zinc will corrode preferentially over the base metal. This sacrificial corrosion prevents the base metal from corroding, as long as the zinc coating remains intact. This is known as cathodic protection.
4. Ease of Application: Zinc is relatively easy to apply as a coating. It can be applied using various methods, including hot-dip galvanizing, electro-galvanizing, and zinc-rich paint. These methods allow for efficient and uniform coating of the metal surface, ensuring maximum protection against corrosion.
Overall, the use of zinc (Zn) as a coating in the galvanization process provides excellent corrosion resistance, self-healing properties, sacrificial protection, and ease of application. This makes it an ideal choice for protecting various metal structures, including steel, from corrosion and extending their lifespan.
Galvanization is a process used to apply a protective coating of zinc (Zn) onto the surface of another metal. This process is commonly used to prevent corrosion and extend the lifespan of the underlying metal.
Why Zinc (Zn) is used for Galvanization:
1. Corrosion Resistance: Zinc is highly resistant to corrosion, making it an ideal choice for galvanization. When zinc is exposed to the atmosphere, it forms a protective layer of zinc oxide (ZnO) and zinc hydroxide (Zn(OH)2) on its surface. This protective layer acts as a barrier, preventing the underlying metal from coming into contact with corrosive substances such as moisture and oxygen.
2. Self-Healing: In the event that the zinc coating is scratched or damaged, zinc has the unique ability to self-heal. This means that if the underlying metal is exposed due to a small scratch or abrasion, the zinc coating will react with the surrounding atmosphere and form a new layer of protective zinc oxide, effectively sealing off the damaged area.
3. Sacrificial Protection: Zinc also provides sacrificial protection to the underlying metal. In the presence of an electrolyte, such as moisture, zinc will corrode preferentially over the base metal. This sacrificial corrosion prevents the base metal from corroding, as long as the zinc coating remains intact. This is known as cathodic protection.
4. Ease of Application: Zinc is relatively easy to apply as a coating. It can be applied using various methods, including hot-dip galvanizing, electro-galvanizing, and zinc-rich paint. These methods allow for efficient and uniform coating of the metal surface, ensuring maximum protection against corrosion.
Overall, the use of zinc (Zn) as a coating in the galvanization process provides excellent corrosion resistance, self-healing properties, sacrificial protection, and ease of application. This makes it an ideal choice for protecting various metal structures, including steel, from corrosion and extending their lifespan.
Most Upvoted Answer
Galvanization is applying a coating of:a)Pbb)Crc)Cud)ZnCorrect answer ...
Galvanization is the process of coating a metal object with a layer of zinc to protect it from corrosion. The correct answer is option 'D' which is Zinc.
Zinc as a coating material:
Zinc is a highly reactive metal and has a strong affinity towards oxygen. When exposed to air, it reacts with oxygen to form a thin layer of zinc oxide on its surface. This layer acts as a barrier between the metal and the air, preventing further oxidation. Zinc is also very ductile and can be easily shaped and molded to fit any object. These properties make it an ideal coating material for metal objects.
Galvanization process:
The galvanization process involves coating a metal object with a layer of zinc to protect it from corrosion. The process can be carried out using one of two methods: hot-dip galvanizing or electroplating.
Hot-dip galvanizing:
In hot-dip galvanizing, the metal object is first cleaned and then dipped into a bath of molten zinc. The high temperature of the zinc bath causes the zinc to react with the surface of the metal, forming a layer of zinc-iron alloy. The object is then removed from the bath and allowed to cool, forming a layer of pure zinc on its surface.
Electroplating:
In electroplating, the metal object is first cleaned and then placed in a solution containing zinc ions. A direct current is then passed through the solution, causing the zinc ions to be deposited onto the surface of the metal object. The object is then removed from the solution and rinsed to remove any excess zinc.
Advantages of galvanization:
Galvanization provides several benefits, including:
1. Corrosion resistance: Zinc is a highly corrosion-resistant material that protects the underlying metal from rust and other forms of corrosion.
2. Longevity: Galvanized objects have a long lifespan and can last for decades without needing to be replaced.
3. Low maintenance: Galvanized objects require very little maintenance, making them a cost-effective choice for many applications.
Conclusion:
In conclusion, galvanization is the process of coating a metal object with a layer of zinc to protect it from corrosion. Zinc is an ideal coating material due to its high reactivity, ability to form a protective oxide layer, and ductility. Galvanization provides several benefits, including corrosion resistance, longevity, and low maintenance.
Zinc as a coating material:
Zinc is a highly reactive metal and has a strong affinity towards oxygen. When exposed to air, it reacts with oxygen to form a thin layer of zinc oxide on its surface. This layer acts as a barrier between the metal and the air, preventing further oxidation. Zinc is also very ductile and can be easily shaped and molded to fit any object. These properties make it an ideal coating material for metal objects.
Galvanization process:
The galvanization process involves coating a metal object with a layer of zinc to protect it from corrosion. The process can be carried out using one of two methods: hot-dip galvanizing or electroplating.
Hot-dip galvanizing:
In hot-dip galvanizing, the metal object is first cleaned and then dipped into a bath of molten zinc. The high temperature of the zinc bath causes the zinc to react with the surface of the metal, forming a layer of zinc-iron alloy. The object is then removed from the bath and allowed to cool, forming a layer of pure zinc on its surface.
Electroplating:
In electroplating, the metal object is first cleaned and then placed in a solution containing zinc ions. A direct current is then passed through the solution, causing the zinc ions to be deposited onto the surface of the metal object. The object is then removed from the solution and rinsed to remove any excess zinc.
Advantages of galvanization:
Galvanization provides several benefits, including:
1. Corrosion resistance: Zinc is a highly corrosion-resistant material that protects the underlying metal from rust and other forms of corrosion.
2. Longevity: Galvanized objects have a long lifespan and can last for decades without needing to be replaced.
3. Low maintenance: Galvanized objects require very little maintenance, making them a cost-effective choice for many applications.
Conclusion:
In conclusion, galvanization is the process of coating a metal object with a layer of zinc to protect it from corrosion. Zinc is an ideal coating material due to its high reactivity, ability to form a protective oxide layer, and ductility. Galvanization provides several benefits, including corrosion resistance, longevity, and low maintenance.
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Galvanization is applying a coating of:a)Pbb)Crc)Cud)ZnCorrect answer ...
This is done on iron which is below Zn in reactivity series so galvanizing with Zn prevents it corrosion by reacting itself
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Galvanization is applying a coating of:a)Pbb)Crc)Cud)ZnCorrect answer is option 'D'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Galvanization is applying a coating of:a)Pbb)Crc)Cud)ZnCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Galvanization is applying a coating of:a)Pbb)Crc)Cud)ZnCorrect answer is option 'D'. Can you explain this answer?.
Galvanization is applying a coating of:a)Pbb)Crc)Cud)ZnCorrect answer is option 'D'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Galvanization is applying a coating of:a)Pbb)Crc)Cud)ZnCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Galvanization is applying a coating of:a)Pbb)Crc)Cud)ZnCorrect answer is option 'D'. Can you explain this answer?.
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