Development of an efficient renewable corrosion-inhibiting agent from Acacia auriculiformis seed oil

Abstract

Corrosion is a cost-worthy problem all over the world. Current approaches to control corrosion have some paucity of efficiency which triggers the search for novel materials that are green, cheap, and made from renewable resources. In this study, an attempt was made to prepare Acacia auriculiformis seed oil (ASO) based fatty amide (AFAM) through a simple reaction route involving aminolysis of ASO fatty acid (AFA) and diethylenetriamine (DETA). FTIR and 1HNMR were used to determine the structural characterisation of the synthesised amide. Properties like acid value, amine value, refractive index, and specific gravity were measured. The coating films were prepared by using a standard formulation, in which synthesised fatty amide was added in different proportions. The performance of the cured films was evaluated and compared. The hydrophobicity test reveals that the hydrophobicity of film increases with the addition of fatty amide up to 2% then decreases. The effect of the synthesised product on mild steel was investigated as per the standard protocol. The results revealed that developed fatty amide inhibits the corrosion of carbon steel up to a certain concentration (2%) in the film.