Effect of Alkylphenol Polyoxyethylene Ether on Corrosion Resistance of Chloride Salts for Steel Bars in Concrete
To study the corrosion and rust inhibition effects of alkylphenol polyoxyethylene ether(APEO)at different concentrations,electrochemical tests were conducted on steel bars to investigate the influence of different APEO concen-trations on the electrochemical behavior and corrosion inhibition effect of steel bars.The results show that with the in-crease of APEO concentration,the electrochemical behavior of steel bars exhibits a three-stage change characteristics:ex-citation,inhibition and re-excitation;When the APEO concentration reaches 30 mg/L,the surface impedance of the steel bar in the corrosion solution is the highest,the corrosion current is the lowest,and the electrochemical reaction intensity is the weakest;When the APEO concentration is too low,it is difficult to form a complete passivation film on the surface of the steel bar;When the concentration is too high,APEO,as a metal complex,is prone to complexation reaction with Fe on the surface of steel bars,exacerbating the corrosion reaction of steel bars.Therefore,adding a certain concentration of APEO can effectively improve the corrosion resistance of steel bars and prolong the service life of reinforced concrete structures in Cl-corrosive environments.
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