Chlorella sp. as green corrosion inhibitor for aluminium in HCL solution / Muhammad Nazrul Mohd Nadzri

Metal corrosion prevention is of technical, economic, environmental, and aesthetic value. The environmental toxicity of organic corrosion inhibitors has led to the quest for green corrosion inhibitors, which are biodegradable, do not include heavy metals or other hazardous chemicals, and are biodegradable. The utility of Chlorella sp. as an aluminium alloy corrosion inhibitor in 0.5M HCl solution was evaluated by weight loss and thermodynamic studies, as well as Fourier transform infrared spectroscopy (FTIR). The findings obtained from weight loss and thermodynamic studies indicate that the value of inhibition efficiency (% IE) is proportional to the concentration of administered inhibitor. According to FTIR constants, Chlorella sp. contains more than one polar group (with atoms of O, N),  electron and protein functional group in FTIR spectra which is a functional group used as an inhibitor. Activation energy for this experiment is 106.72 kJ mol-1 greater than 80 kJ mol-1, suggested mechanism for corrosion inhibitor of Chlorella biomass is chemisorption. Chlorella sp. derived from a renewable resource with minimal health and safety issues has the potential to be a cost-effective alternative to synthetic corrosion inhibitors, according to the experimental results.