Study of the factors of burial conditions attack the archaeological iron objects.
Most of the metal objects excavated in the archaeological
sites in lapan have been corroded because the burial conditions
of Japan are usually wet. The iron artifacts hold a majority of all
excavated metal objects have been atacked by anions of water
soluble salts in soil under the ground. They are deteriorated
easily unless treated with appropriate care after unearthed in
The physical properties and anion in soil of the
archaeological site，the corrosion products of iron artifacts has
been investigated. As a result，the physical properties have no
influence the corrosion of iron artifacts. The anions such as
chloride ion and sulfuric acid ion, phosphoric acid ion were
segreated around the iron artifacts. It was found that the burial
condition of this site has been reducing.