STATISTICAL EVALUATION OF THE RELATIONSHIP BETWEEN THE METALLIC ELEMENTS THAT MIGRATE FROM AISI304 AND AISI321 STAINLESS STEEL SAMPLES IN SIMULANT SOLUTIONS AT DIFFERENT IMMERSION TIMES

摘要

The aim of this paper was to evaluate the relationship between the metallic elements that migrate from AISI304 and AISI321 stainless steel samples in acidic food simulant solutions at different immersion times. In this study were used simulant solutions with different concentrations of acetic acid in double distilled water, different stiring environment and different immersion times of metal samples in corrosive solutions. To achieve this purpose, the experimental data were statistically processed by analyzing the correlation between variables based on Pearson correlation matrix and analyze relationships between variables by the Principal Component Analysis method (PCA). The influence of the immersion time on the dissolution rate of the Cr, Mn, 56 Fe and Ni metal ions from AISI304 stainless steel samples and the Ti, Cr, Mn, 56 Fe and Ni metal ions from AISI321 stainless steel samples was studied. The results obtained and the conclusions reached, demonstrates that the statistical method used in this study is a useful tool for studying the dissolution phenomena of metal ions in acidic food environments.