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中文摘要：
采用电化学阻抗谱（EIS）和极化曲线研究十二烷基苯磺酸钠（SDBS）对AZ31镁合金在3.5%（w,质量分数）NaCl腐蚀介质中的吸附行为及缓蚀作用.结果表明：SDBS可有效抑制AZ31镁合金在NaCl介质中的腐蚀,其浓度为0.008mol·L-1时缓蚀效率可达90%以上;升高温度并不利于提高SDBS的缓蚀效率.SDBS在AZ31镁合金表面主要发生物理吸附,吸附过程为放热、熵增的自发过程,近似符合Langmuir单分子层吸附模型;SDBS为混合抑制型缓蚀剂,但主要抑制阳极反应.
英文摘要：
Electrochemical impedance spectroscopy （EIS） and polarization curves were used to study the adsorption and corrosion inhibition of sodium dodecylbenzenesulfonate （SDBS） on AZ31 magnesium alloy in 3.5% （w, mass fraction） NaC1 corrosive medium. Results showed that SDBS strongly inhibited the corrosion of AZ31 magnesium alloy in NaC1 medium. The inhibition efficiency of 0.008 mol＇L-1 SDBS was more than 90%. Increasing temperature did not increase the inhibition efficiency. Physical adsorption of SDBS at the AZ31 magnesium alloy surface mainly occurred. The adsorption process was spontaneous and exothermic and the entropy increased, which obeyed the Langmuir isotherm. SDBS is a mixed-type inhibitor and mainly inhibits the anodic dissolution reaction of AZ31 magnesium alloy.
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