The Possibility of Using Barley Grains Extract as an Acidic Corrosion Inhibitor for Carbon Steel

The effect of barley seed extracts on the corrosion carbon steel in 1M hydrochloric acid at different temperatures was investigated from perspective their potential use as green inhibitors cleaning and descaling processes heat exchangers. A 50% ethanol/water (vol) solution used for extraction. Two extraction methods were used: soaking ultrasound. inhibition mechanism inhibitor that gave best efficiency by studying adsorption electrochemical (potentiodynamic polarisation (Tafel curves) resistance spectroscopy) thermodynamic calculations. results study showed no method behavior, a function concentration significant increase up to 400 ppm, then it appeared independent both methods. However, higher 800 ppm (87.01% compared 80% ultrasound method). this extract indicated possibility chemical adsorption. Inhibition activity increased with temperature.