Question

causes of passivity of metals​

Answer 1

ⓗⓔⓨ ⓜⓐⓣⓔ......‼️

ⓣⓗⓘⓢ ⓘⓢ ⓣⓗⓔ ⓐⓝⓢⓦⓔⓡ....❤

As a result of ⓜⓔⓣⓐⓛ being completely shielded by the layer of oxide, it could no longer dissolve anodically. In other world metal becomes passive due to the formation of an oxide film on its surface. that: ➢ The properties of oxide responsible for passivity must be different from those of any known oxide of the metal.

ⓜⓐⓡⓚ ⓑⓡⓐⓘⓝⓛⓘⓢⓣ

Answer 2

Passivity results in the formation of very protective thin layer on the surface of metal or an alloy to make it noble.