Investigation of Corrosion Properties and Composition of the Surface Formed on AISI 321 Stainless Steel by Ion Implantation

In this work, the corrosion resistance of AISI 321 stainless steel is increased through. two-stage implantation oxygen ions and both aluminum boron together. During ion implantation, a modified layer with thickness about 200 nm formed, which affects properties material. The increase in confirmed by prolonged acid tests at pH 3.5 accelerated electrochemical using potentiostat. rate implanted sample 0.708 μA/cm2, contrast to non-implanted (1.26 μA/cm2). surface examined X-ray photoelectron spectroscopy (XPS), secondary-ion mass spectrometry (SIMS), transmission electron microscopy (TEM). Aluminum are depth more than 250 nm. It found that substrate contains oxides (Al2O3) (Cr2O3 NiCr2O4).