Carbohydrate polymer–metal nanocomposites as advanced anticorrosive materials: a perspective

Recently, carbohydrate polymer–metal nanocomposites (CPMNCs) have emerged as a new highly effective and environmentally friendly class of anticorrosive materials. The CPMNCs exhibit relatively high %IE (percentage efficiency) as compared to the purified carbohydrate polymers. As CPMNCs have a high surface area-to-volume proportion, they deliver excellent surface safety from corrosion. The reports on the anticorrosive effect of CPMNCs are very limited therefore there is a huge demand of exploration of these materials for anticorrosive applications in solution as well as coating phase. Literature investigation shows that the anticorrosive effect of CPMNCs is tested only for a few metals/alloys therefore their anticorrosive application should be explored for other metals/alloys. In the present perspective, the inhibition consequence of CPMNCs is graphed. Studies revealed that CPMNCs exhibit more than 95% efficiency at 1000 ppm concentration. The adsorption of CPMNCs follows various adsorption isotherms including Frumkin, Temkin and Langmuir isotherms. Their adsorption on the metallic surface and corrosion inhibition mechanism are greatly supported by surface analyses, especially through SEM, AFM, EDS, and FT-IR techniques. Generally, CPMNCs behave as mixed-and interface-type inhibitors.