STUDY OF CORROSION BEHAVIOR OF AISI304 STAINLESS STEEL SAMPLES USING ACCELERATED ELECTROCHEMICAL METHODS

Abstract

The  aim  of  this  work  was  the  study  of  corrosion  behavior  of  the  AISI304  stainless  steel samples in 3%, 6% and 9% acetic acid solutions, using accelarated electrochemical methods. In order to achieve accelerated corrosion tests was been used a system consisting of a potentiostat-galvanostat Wenking HP 96-20, an electrochemical cell, two multimeters Hameg  HM 8112-3  for monitoring the voltage  values  and  a  PC  system  for  programming,  command,  acquisition  and  interpretation of  the values recorded on the multimeter. In order to developing the mass balance of the migration process of metal ions were calculated the theoretical masses of  ⁵⁶Fe, Mn, Cr and Ni ions migrated in the acidic simulant solutions. Chemical analysis  of  corrosive  solutions,  after  carrying  out  the electrochemical  tests,  was  carried  out  using ICP-MS  method.  Were  calculated  the  dissolution  rates  η  for  each  metal  ion studied.  Regarding  the corrosion behavior of metal ions in corrosive solutions was observed a decrease of  dissolution rate with the increasing of acetic solution concentration.