Preparation environmental friendly of inhibitor based on natural henna for aluminium protection

Abstract

This project is a flow to discover the new technology or advantages that can give benefit either in industry or human life. The natural plants or environment friendly is been common used in the industry as corrosion inhibitor. The inhibition effect of Henna leaves (Lawsonia Inermis) will be studied about corrosion rate and inhibitor efficiency between three parameters. The henna extract was mixed in different solvents or parameters to compare the corrosion performances. These mixtures were used as pigment and solvent to create new paint or formulation before coating samples. The aluminium alloy type AA5083 were used and coated by the paint formulation which is mixing with henna extract. Then, the coated samples were tested with salt spray for 30 days. The measurement of corrosion rate and inhibitor efficiency had been determined using the polarization, EIS and Weight Loss Measurement. The past researches just used immersion test as method to study the possibility of a plant as corrosion inhibitor. This project is focused only on coating method to study the suitability of inhibitor either can improve the corrosion resistance in selected formulation. The scope of study only focuses for certain material which is aluminium alloy and Henna extract. The further researches can use more type of metals and inhibitors to compare the performance of inhibitors in coating method. The research shows performance of henna depends on the characteristic of solvent. Formulation with distilled water show high resistant due to characteristic of distilled water. Distillation of water removes the mineral content and eliminates electrolyte.