Corrosion resistance of 200 and 304 series stainless steel has been studied by means of potentiodynamic polarization curves in 3.5% NaCl solution and salt spray test.Resultsshow that pitting corrosion resistance and uniform corrosion resistance of 304 series stainless steel is much better than that of 200 series.Pitting potential of 201, 202 and 304 series stainless steel in 3.5% NaCl solution are-32, -22, 312 mV and corrosion rate are 0.007 1, 0.006 2, 0.002 6 mm/a respectively.
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