Evaluation of Corrosion Inhibition Efficiency of Poly(1,4-trans Myrcene-co-Styrene) Copolymer on Carbon Steel in a Hydrochloric Acid Solution

The long-standing history of low corrosion resistance in E316 CS poses a persistent challenge for its industrial applications.Green CI are among the most widely adopted and cost-effective methods to protect metals and alloys against corrosion.In this study, a novel approach involving controlled block polymerization of myrcene, a biobased isoprene dimer, with styrene, using a Nd(BH4)3(THF)3/BEM-based catalytic system, resulted in the synthesis of poly(1,4-trans myrcene-co-styrene) -PMy-copolymer.This transparent and adhesive copolymer was developed as CI agent.Experiments were conducted using WL method and electrochemical techniques, at various polymer Ct and IT.According to the results obtained from WL and electrochemical analyses, increased IE(%) was observed using a polymer Ct of V3, corresponding to 1,5 g/L, suggesting higher corrosion IE(%) properties.Electrochemical analyses revealed that PMy exhibited a uniform CI effect, with a cathodic predominance.Additionally, Rct of CS electrode in an untreated solution increased from 71.25 to 668.3 Ω cm -2 , in a solution with PMy, after 24 h of IT.