Development of PU/Graphene Anticorrosion/antifriction coatings

Remya Balakrishnan; Monisha Kanjuchirayil; Nallaperumal Agasthialingom Meenakshi Sundary

Abstract

Corrosion inhibition and reduction of frictional wear is a necessary requirement in launch vehicles. Organic coating proves to be the cheapest and most advantageous owing to its high mechanical resistance and high adhesion, better chemical stability, low permeability for corrosive components etc. Among the organic coatings reported, Polyurethane is found to be the most suitable candidate it being relatively durable, softer and more elastic than other organic coatings. However, graphene is added as a filler to improve the mechanical qualities of the polyurethane coating. Graphene is considered as a wonder material because of its fascinating properties and when incorporated in Polyurethane is found to show anti-corrosion and anti-friction properties.In this study, polyurethane based coating is developed using a adipic acid based polyester polyol and characterization in terms of anti-corrosion, anti-friction, surface roughness and thermal conductivity is carried out. It is observed that graphene incorporation greatly enhances its corrosion inhabitance and frictional resistance.