STATISTICAL STUDY OF THE DEPENDENCE BETWEEN CONCENTRATION OF METALLIC ELEMENTS MIGRATED FROM STAINLESS STEEL GRADE AISI321 AND WORKING PARAMETERS
Abstract
One of the main problems concerning food safety is the possible migration of ions in metallic materials intended to come into contact with food. The aim of this paper is to find and apply the mathematical modeling of experimental data which should describe as accurately as possible the dependence between the variables used in the experimental plan. The research made and presented in this study also aims to create a real possibility for rapid intervention in the process control when one of the parameters cannot be maintained at a predetermined value. In this paper we used some experimental data obtained by testing the migration of metal ions from austenitic stainless steel grade AISI 321 samples in solutions with concentrations of 3%, 6% and 9% acetic acid. To find an accurate mathematical model describing the phenomena of diffusion, ANOVA method, known as the variance analysis, was used. In order to obtain the mathematical model we used a polynomial model with independent variables: corrosive environment temperature (X1), exposure time (X2), stirring environment (X3) and the dependent variables Y - concentrations of elements Ti, Cr, Mn, 56Fe and Ni found in solutions. Values of the regression coefficients very close to the value 1 (the dependent variables coefficients are valid) were obtained, which demonstrates the validity of the applied method.
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Food and Environment Safety by Stefan cel Mare University of Suceava is licensed under a Creative Commons Attribution 4.0 International License.
Online ISSN: 2559 - 6381
Print ISSN: 2068 - 6609