Irradiation Enhanced Corrosion Resistance of Crn/Tisin Multilayers Synthesized by Caip

Abstract

The effect induced by irradiation is often considered as ‘negative impact’. Irradiation damage normally leads to vacancies, clusters and interstitials, therefore resulting in the attenuation of material stability such as corrosion resistance. Here, we report that irradiation enhances corrosion resistance of multilayered CrN/TiSiN coatings. The improvement of corrosion resistance is demonstrated by EIS analysis, and the validity of our findings are further proved by the surface morphology of corroded samples. The enhancement is attributed to rapid formation of passive films upon the irradiation induced amorphous layer during corrosive process. Our results reveal profound insights into corresponding corrosion mechanism of nitride coatings based on the microstructure investigation of corroded coatings and contribute to the understanding of corrosion behaviors of irradiated nitride coatings.

Keywords: CrN/TiSiN coating, irradiation, amorphization, enhanced corrosion resistance, pitting