【摘要】 采用电化学阻抗谱（EIS）与动电位极化（PDP）的完全析因试验,结合统计分析,研究了温度、Cl^-和SO₄^-2对Q235B钢腐蚀初期电化学行为的影响机制。结果表明:温度升高显著降低电荷转移电阻（Rct）,加速腐蚀进程,其作用机制主要与传质过程相关;Cl^-和SO₄^-2含量的增加显著提高溶液电阻（Rs）和常相位角元件的效应量（偏Eta方>0.5）,表明这二者通过增强界面导电性影响电化学反应动力学。此外,Cl^-含量与界面电容呈负相关性（r=-0.28）,而其与SO₄^-2含量则呈正相关性（r=0.44）,表明SO₄^-2与Cl^-相互作用,在一定浓度下抑制腐蚀。更多还原

【Abstract】 The influence mechanism of temperature,Cl^-,and SO₄^-2 on the electrochemical behavior of Q235B steel in the early stage of corrosion was studied through complete factorial experiments using electrochemical impedance spectroscopy（EIS）and potentiodynamic polarization（PDP）,combined with statistical analysis.The results indicate that an increase in temperature significantly reduced the charge transfer resistance（Rct）and accelerated the corrosion process,with its mechanism mainly related to mass transfer processes.The increase in Cl^-and SO₄^-2 content significantly increased the solution resistance and the effect of the constant phase angle element（biased Eta>0.5）,indicating that these ions affected the electrochemical reaction kinetics by enhancing interfacial conductivity.In addition,Cl^-was negatively correlated with interfacial capacitance（r=-0.28）,while SO₄^-2 was positively correlated（r=0.44）.This indicated that SO₄^-2 might interact with Cl^-and inhibit corrosion at certain concentrations.更多还原