Question

Which of the following is not a requirement for fine coating in the process of electroplating?

• A. The object to be electroplated should be free from greasy matter.
• B. The surface of the article should be smooth so that the metal deposited sticks permanently.
• C. The concentration of the electrolyte should be adjusted so as to get a smooth coating.
• D. Current must be the same throughout.

Answer 1

The correct option is B The surface of the article should be smooth so that the metal deposited sticks permanently.

The following are the requirements for fine coating:
i. The object to be electroplated should be free from greasy matter.
ii. The surface of the article should be rough so that the metal deposited sticks permanently.
iii. The concentration of the electrolyte should be adjusted so as to get a smooth coating.
iv. Current must be the same throughout.

Thus, the surface of the article should be rough, not smooth, in order to achieve a fine coating. This ensures the deposited metal will stick permanently.