Study of the impact factors on heavy metals migration of stainless steel choppers

摘要

The factors on the impact of heavy metals migration (Nickel(Ni) and Chromium(Cr))of stainless steel choppers were studied in this paper, including chemical composition of stainless steel choppers and surface treatment, sample soaking mode, soaking time and soaking temperature. The results shown that, which did not exist linear relationship between the chemical composition and heavy metal migration. Instead, the surface treatment process was the major impact factor. The heavy metals migration of stainless steel choppers reduced after surface treatment processes. Than the direct integral soaking mode, the slices soaking mode had a larger migration of heavy metals. The Nickel(Ni) and Chromium(Cr) migration increased with the immersion time and the immersion temperature. In summary, by controlling the processing and use method of the chopper can effectively control the migration of heavy metals.