Research progress in corrosion resistance of nano-materials/epoxy composite coatings

Abstract

Structural protection method,protective layer method,protective layer material,electrochemical protection method and medium treatment method are the main methods for metal corrosion prevention.Among many corrosion inhibition methods,protective layer material anti-corrosion method is an economical,efficient and widely used anti-corrosion method.Epoxy resin is an efficient protective layer material,which can be used after curing at room temperature or heating.However,the micropores in the curing process may weaken the corrosion resistance of epoxy coating.Therefore,adding nanomaterials into epoxy resin to form epoxy resin composite coating can fill the micropores in epoxy coating,thus improving the anti-corrosion efficiency of epoxy coating.Firstly,the factors affecting the corrosion resistance of nanomaterials/epoxy composite coating were introduced in detail,and the corrosion resistance mechanisms of nanomaterial/epoxy composite coating were discussed.In addition,two kinds of nanomaterials (graphene and metal-organic framework materials) used for epoxy coating were briefly introduced,and the modification methods of graphene and metal-organic framework materials were summarized.Finally,the problem in application and the development prospect of nanomaterials/epoxy composite coating were prospected from the aspects of resin composition,filler composition,mechanism exploration and development of self-healing coating,and it was pointed out that nanomaterials/epoxy composite coating is a long-term method to protect metals from corrosion,and two-dimensional and three-dimensional materials for epoxy coatings should be developed in the future.

Keywords

• corrosion and anti-corrosion chemistry; nan-omaterials; epoxy coating; corrosion resistance; graphene; metal-organic frameworks