Manufacturing method of the alloy material using the polishing composition alloy material and it

Alloy polishing composition used in application to polish the alloy material is provided. Alloy material contains a first metal species of the main component, and a second metal species having a higher standard electrode potential than the standard electrode potential of different types a and the first metal species and said first metal species. Alloy polishing composition contains a compound is a functional group attached to the carbon which is capable of capturing the second metal species.