Corrosion inhibition effect of biheterocyclic lauryl imidazoline quaternary ammonium salt rust inhibitor
In order to investigate the rust inhibition effect of bis-heterocyclic lauryl imidazoline quaternary ammonium rust inhibitor(IQS),electrochemical restoration technology(ECE),kinetic potential polarization method,total organic carbon method and ion chromatography were used to test the corrosion inhibition rate(η)of IQS,the amount of adsorption on the surface of rebar,and the concentration of free Cl-in the vicinity of the rebar and compare it with that of aminohydrin composite internally doped rust inhibitor(DCI)and soluble ammonium carboxylate externally infiltrated rust inhibitor(MCI).The results showed that:ηDCI(20.0％)＞ηIQS(13.5％)＞ηMCI(6.5％),cDCI(2.0 mg/g)＞cIQS(1.5 mg/g)＞cMCI(0.8 mg/g),the free Cl-concentration near the IQS group steel bars is the lowest;the ECE treatment made the in-migration efficiency of-R4N+dissociated from IQS superior to the free migration efficiency of MCI and promoted the out-migration of free Cl-in the vicinity of the reinforcement bars,but ηIQS was still lower than ηDCI,and the rust inhibition effect of IQS could be enhanced by optimizing the current density and power on time.
万方数据
维普
