Abstract: During the long-term service of concrete-filled steel tubes (CFSTs) in coastal environments, the corrosion issue induced by stray current cannot be ignored. However, there remains a lack of rapid, non-destructive and accurate methods for evaluating the corrosion durability of CFSTs under conplex polarization conditions. To address this, an alternating current (AC) time average polarization curve test method is proposed to assess this process: firstly, an electrochemical workstation is used to collect key data such as current and potential before the step point of the stepped sine wave; secondly, the charging/discharging current density and Faraday current density are separated from the total current via an simplkified equivalent circuit; thirdly, the relationship between corrosion current density and electrode potential is obtained by linear extrapolation; finally, the reliability of this method is verified through mass loss method. The results show that this method can be used to evaluate the AC polarization corrosion durability of CFSTs.