Abstract
Chitosan is a promising biopolymer to be used as environmentally friendly materials for corrosion protection. In this work, two novel chitosan derivatives (CS-1 and CS-2) were synthesized as eco-friendly inhibitors and their inhibitive performances for the corrosion of Q235 mild steel in 1 M HCl solution were evaluated by electrochemical measurements and surface characterization. It is found that the inhibition efficiency of CS-2 reaches 98.0 % with the concentration of 150 mg/L, which is much higher than those already reported chitosan derivatives. The relationship between the structures and high inhibition effect of the developed chitosan derivatives is revealed by theoretical calculations.
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