Which of the following process to be carried out to avoid the
formation of greenish layer on brass vessels due to corrosion?
a) plating b) anodization c) tinning d) alloying
Answers
b) anodization.
Anodization is an electrolytic process that is used for increasing the thickness and layer of natural oxide on a metal parts surface. The process named so as the part that has to be treated is made the anode of the electrolytic cell.
Anodizing helps in increasing the resistance to wear and corrosion. It also helps in providing a better cohesion for glues and paint primers compared to bare metal.
By anodization, one can alter the metal crystal structure near to the surface and also improve the microscopic details of the surface. All types of thick coatings are usually porous.
Therefore, a sealing process may be needed to get resistance against corrosion.
Therefore, a formation of a greenish layer on brass due to corrosion can be easily avoided by using anodization.