采用电化学和失重法研究N-烷基月桂酰胺(NALA)对硫酸溶液中碳钢腐蚀的缓蚀行为和吸附规律。实验表明,其缓蚀性能优良,主要属以阻滞阳极过程为主的缓蚀剂,吸附过程为放热反应,属化学吸附,在不同吸附阶段分别遵循Temkin和Frumkin吸附等温式。
By electrochemical method and weight loss measurements, the inhibition and adsorption behaviour of N-alkyl lauryl amide (NALA) on carbon steel in sulphuric acid solution was studied. NALAexhibited reasonable corrosion inhibition performance. When concentration of NALA exceeded 0.60mmol/L, its inhibition efficiency reached more than 90%. Polarization measurements showed NALA mainly hindered anodic process. Its adsorption process was an exothermic reaction, and could be attributed to chemical adsorption. There was a transition point on isothermal adsorption curve (θtrans=90.5%). When θ<θ trans, Temkin adsorption isothemal equation was followed. When θ>θ trans, Frumkin adsorption isothermal equation was obeyed.
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