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

Silviu-Gabriel STROE

Abstract

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, 56Fe  and  Ni  metal  ions  from  AISI304 stainless steel samples and the Ti, Cr, Mn,

56Fe 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.

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