1. ZINC PLATING
BY- PRAKASH BEHERA 1

2. WHAT IS ZINC PLATING?
Zinc plating involves the electrodeposition of a
thin coating of zinc metal onto the surface of
another metal object, known as a substrate.
Zinc plating, also known as galvanization, is a
process that involves applying a protective zinc
coating to the surface of a metal object.
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3. https://youtu.be/Wy6u2kikAA4
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4. THE ZINC PLATING PROCESS TYPICALLY INVOLVES
THE FOLLOWING STEPS:
1. SURFACE PREPARATION.
2. ACID CLEANING.
3. ELECTROCLEANING.
4. ZINC PLATING.
5. POST-TREATMENT.
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5. 1. SURFACE PREPARATION
THE METAL OBJECT TO BE PLATED IS FIRST CLEANED
TO REMOVE ANY DIRT, OIL, RUST, OR OTHER
CONTAMINANTS.
THIS STEP IS CRUCIAL TO ENSURE GOOD ADHESION
OF THE ZINC COATING.
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6. 2. ACID CLEANING.
IN SOME CASES, THE METAL OBJECT IS FURTHER
TREATED WITH AN ACID SOLUTION TO REMOVE
ANY REMAINING CONTAMINANTS AND TO
ACTIVATE THE SURFACE FOR PLATING.
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7. 3. ELECTROCLEANING.
(OPTIONAL)
FOR CERTAIN APPLICATIONS, AN
ELECTROCLEANING STEP MAY BE PERFORMED TO
REMOVE ANY STUBBORN CONTAMINANTS OR
OXIDE LAYERS FROM THE METAL SURFACE.
THIS STEP IS PARTICULARLY IMPORTANT FOR
ACHIEVING A HIGH-QUALITY ZINC COATING.
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9. 4. ZINC PLATING.
THE CLEANED METAL OBJECT IS IMMERSED IN AN
ELECTROLYTE SOLUTION CONTAINING ZINC IONS.
A DIRECT ELECTRIC CURRENT IS THEN PASSED
THROUGH THE SOLUTION, CAUSING THE ZINC IONS
TO MIGRATE AND DEPOSIT ONTO THE SURFACE OF
THE METAL OBJECT.
THIS ELECTROCHEMICAL PROCESS FORMS A THIN
LAYER OF ZINC ON THE SURFACE, PROVIDING
PROTECTION AGAINST CORROSION.
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11. 5. POST-YTREATMENT
AFTER THE ZINC PLATING PROCESS, THE METAL
OBJECT MAY UNDERGO ADDITIONAL TREATMENTS
TO ENHANCE ITS PROPERTIES.
THESE TREATMENTS CAN INCLUDE CHROMATE
CONVERSION COATING, PASSIVATION, OR SEALING,
WHICH IMPROVE CORROSION RESISTANCE AND
PROVIDE A SPECIFIC COLOR OR FINISH.
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12. TYPES OF ZINC PLATING
The most common types of zinc plating include:
1. ACID ZINC PLATING
2. ALKALINE ZING PLATING
3. ZINC-NICKEL ALLOY PLATING
4. ZINC-IRON ALLOY PLATING
5. ZINC-COBALT ALLOY PLATING
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13. https://youtu.be/FCARBm0Ove4
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14. ADVANTAGES
EXCELLENT CORROSION RESISTANCE.
LOW COST.
COMPATABILITY WITH A WIDE RANGE OF MATERIALS.
IT IS COMMONLY USED IN INDUSTRIES SUCH AS
AUTOMOTIVE, CONSTRUCTION, ELECTRICAL, AND
CONSUMER GOODS.
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15. DISADVANTAGES
THE THICKNESS OF THE ZINC COATING CAN VARY
DEPENDING ON THE DESIRED APPLICATION, AND IT
MAY NOT PROVIDE AS MUCH PROTECTION AS OTHER
COATING METHODS LIKE HOT-DIP GALVANIZING.
ZINC PLATING IS NOT SUITABLE FOR HIGH-
TEMPERATURE APPLICATIONS, AS THE ZINC COATING
CAN DEGRADE AT ELEVATED TEMPERATURES.
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16. CONCLUSION
OVERALL, ZINC PLATING IS A WIDELY USED
PROCESS TO PROTECT AND ENHANCE THE
APPEARANCE OF METAL OBJECTS, OFFERING A
COST-EFFECTIVE SOLUTION FOR CORROSION
PREVENTION IN VARIOUS INDUSTRIES.
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17. THANK YOU
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