The purpose of this paper is to study the effect of concentration of H2SO4 on the corrosion of mild steel and to investigate the inhibitive properties of Aloe vera for mild steel corrosion. The study also seeks to investigate the possibility of using Aloe vera as a green corrosion inhibitor for mild steel.
An aqueous extract of Aloe vera (L) Burm f. (Liliaceae) has been used as a corrosion inhibitor in controlling corrosion of carbon steel immersed in sea water. Weight loss method reveals that 4ml of the extract provide 98% inhibition efficiency. The protective film has been analyzed using Fourier transform infrared (FTIR) spectroscopy and fluorescence spectroscopy. Electrochemical studies such as potentiodynamic polarization and alternating current impedance spectra have been used to find the mechanistic aspects of corrosion inhibition.
A scale inhibitor copolymer modification with chitosan was prepared from maleic anhydride, styrene sulfonic sodium, acrylic amide and chitosan. The conditions of preparing scale inhibitor were optimized. The chemical structure and thermal property were investigated. Using the static experiment method, the influences of copolymer concentration, temperature time, Ca2+ concentration, HCO3− concentration of the system on the inhibition efficiency were investigated. The experimental results showed that the polymer was excellent calcium carbonate scale inhibition and the resistance rate of calcium carbonate scale up to 95.62%, and could be used in the system of high temperature and high hardness water.
