Inffluence of Ion Beam Implantation on the Corrosion Properties of Stainless Steel

A modified surface layers with high resistance were successfully prepared on corrosion stainless steel by Ion Beam Implantation (IBI). These layers contain oxides of chromium, aluminum, iron, and boron. It was revealed that the implantation of oxygen and aluminum with boron has a positive effect to the characteristic of the formed layers. In order to confirm this phenomenon, scanning electron microscopy (SEM), secondary ion mass spectrometry (SIMS), X-ray photoelectron spectroscopy were carried out to investigate the morphology and composition of this layer after ion implantation process. The corrosion behavior of the implanted stainless steel was investigated in NaCl solution by electrochemical system and long-term salt spray (NSS) tests. The modified surface layer has been demonstrated to improve the corrosion resistance of stainless steels, even in the long standing corrosion influence. Finally, the corrosion of the stainless steel with implantation was discussed.