Why is HCl used to clean graphite rods and does it affect them?

[ARN]

Homework Statement:: why HCL is always used for cleaning materials. I have cleaned graphite rod with HCl. How will it help ? How does HCL do the cleaning?
Relevant Equations:: Nothing

some says that it helps to remove the impurities, but how ? will it effect the graphite rod?

[Moderator's note: Moved to a technical forum as it is of a general nature.]

 

[phinds]

How is this a homework problem? What research have you done so far? What have you found out?

 

[chemisttree]

Could it be that you are trying to remove metallic impurities?

metal (s) + HCl(aq) ——> metal⁺ⁿ(aq) + nCl^-(aq) +1/2n H₂(g)

 

[naresh123]

HCL + Water is Used in Cleaning in Tiles!