아연을 도핑한 카본 나이트라이드가 첨가된 에폭시 코팅에 대한 부식 방지 연구

Abstract

Corrosion is a serious problem worldwide. This creates economic and industrial problems. The economic losses incurred by preventing corrosion are so great that they account for 3.4% of world GDP. Epoxy coating is mainly used to prevent this corrosion, but it has the disadvantage of allowing corrosion factors to quickly penetrate due to the presence of hydroxyl groups. To solve this, there are methods such as Barrier Effect, Cathodic Protection, Anodic Passivation, Self-Healing, and Inhibition. Among them, the most commonly used derivatives, such as graphene, contribute significantly to the blocking effect, but are toxic and expensive. Carbon nitride has a lamellar structure like graphene, which helps with the blocking effect, but it is a material that has limitations in preventing corrosion due to the presence of pores. In this study, to improve corrosion prevention performance, zinc was doped into the metal to create pores in the coating. EtOH and ZnCl were used for doping. Fourier transform infrared spectroscopy (FT-IR) was used to confirm structural stability, and X-ray photoelectron spectroscopy (XPS), UV-vis were used to confirm chemical bonding. Afterwards, delamination was confirmed using X-ray diffraction (XRD) and field emission transmission electron spectroscopy (FE-SEM). In addition, the corrosion prevention performance of carbon nitride was confirmed according to the mixing ratio, and Electrochemical impedance spectroscopy (EIS) was performed through this. Afterwards, Salt Spray Test (SST) was performed to confirm cathodic protection, and through this, higher corrosion performance and cathodic protection than existing carbon nitride were confirmed.