Abstract Anticorrosion coatings based on epoxy ester containing different concentrations of dodecyl benzene sulfonic acid doped polyaniline nanoparticles (nPAni(DBSA)) were prepared and applied on the carbon steel surface. The corrosion behavior of this system in saline-alkaline solution (3.5% NaCl and pH 9) was studied using electrochemical impedance spectroscopy (EIS) during 100 days immersion. At the end of immersion, the metal/coating interface was analyzed using scanning electron microscopy (SEM) and Raman spectroscopy. The obtained results showed that nPAni(DBSA) particles could efficiently improve the anticorrosion performance of the epoxy ester coating through both the barrier and the active mechanisms where the best corrosion inhibition of carbon steel was attained at 1.5% of nPAni(DBSA). The active inhibition of nPAni(DBSA) is attributed to the formation of a secondary passive layer at the metal/coating interface.

中文翻译：

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DBSA掺杂聚苯胺纳米颗粒/环氧酯涂层在盐碱溶液中碳钢的防腐性能

摘要 制备了含不同浓度十二烷基苯磺酸掺杂聚苯胺纳米粒子(nPAni(DBSA))的环氧酯基防腐涂料，并应用于碳钢表面。在浸泡 100 天期间，使用电化学阻抗谱 (EIS) 研究了该系统在盐碱溶液（3.5% NaCl 和 pH 值 9）中的腐蚀行为。在浸渍结束时，使用扫描电子显微镜 (SEM) 和拉曼光谱分析金属/涂层界面。所得结果表明，nPAni(DBSA)颗粒可以通过阻隔和活性机制有效提高环氧酯涂层的防腐性能，其中nPAni(DBSA)含量为1.5%时对碳钢的缓蚀效果最佳。