Graphene enhanced conductive cementitious coating (GREC)

Purpose and goal

In this study, the functionality of a self-formulated - carbon-based conductive coatings (CBCCs) with incorporation of graphite/graphene as the anode in an Impressed Current Cathodic Protection (ICCP) system is studied. The anode materials are tested and evaluated for long-term durability and performance by an accelerated durability test method. The results show that the functional time is highly dependent on the acceleration factor, and thus the charge passed through the material during testing, as well as the material composition.

Expected results and effects

In this study we have investigated and evaluated new types of conductive coatings as the anode for an ICCP system, consisting of a combination of commercially available materials, by an accelerated durability test. The results show that a matrix made of a combination of a micro-cement and a styrene-acrylate copolymer with the incorporation of a micro-graphite together with a smaller amount of graphene show all the required and desired properties and can withstand relatively high applied current densities.

Planned approach and implementation

Developed coating in the present study, shows proper characteristics in terms of conductivity and water resistance, and it is porous enough to release relatively large amounts of the gases generated during the ICCP anodic reaction. The results also show that the incorporation of smaller amounts of graphene into the cementitious matrix mainly influences the homogeneity of the matrix.