Abstract

In this work, we have carried out the synthesis and characterization of paints based on an epoxy resin by using polyaniline as a corrosion inhibitor for protecting the mild steel in an aggressive environment (5% NaCl). We have opted for the formulation of several epoxy paints in aim to their uses as primary layers and to compare their anticorrosion properties for the mild steel protection in saline medium. We used polyaniline and zinc phosphate (proposed by ENAP) as anticorrosion agents. During the synthesis of the paint, we controlled three parameters: density, solid content, and viscosity. Two methods, one experimental and one theoretical, have been implemented to monitor the effectiveness of the formulated. According to the results obtained by the efficiency calculations, it was found that the efficiency increased with the increase of the percentage of PANI. The weight loss method was also used to evaluate corrosion, the value of the protective efficiency reached 97,43% for 8.70 mg of polyaniline. Furthermore, in addition, the morphology of the finished samples was observed using the scanning electron microscopy. Corrosion-resistant paints must have maximum compactness to present a significant barrier effect. The grid tests allow us to evaluate the adherence of the paint and show the good behavior of our product in accelerated corrosive environment and clearly demonstrate that they preserve their adhesion properties.

• HIGHLIGHTS

• Use of polyaniline and phosphate zinc (proposed by ENAP) as anticorrosion agents.

• The inhibition efficacy of the studied coatings realized by two methods, one experimental and the other theoretical.

• The efficiency increased with the increase of the percentage of PANI.

• The corrosion inhibition for mild steel was studied using weight loss test and the neutral salt spray test (NSS).

摘要

在这项工作中，我们通过使用聚苯胺作为缓蚀剂在腐蚀性环境中保护低碳钢（5％NaCl）的方法，对基于环氧树脂的涂料进行了合成和表征。我们选择了几种环氧涂料的配方，旨在将它们用作主要涂层，并比较它们在盐介质中对低碳钢的防护性能。我们使用聚苯胺和磷酸锌（ENAP提出）作为防腐剂。在涂料的合成过程中，我们控制了三个参数：密度，固含量和粘度。已经实施了两种方法，一种是实验性的，一种是理论性的，以监测制剂的有效性。根据效率计算得出的结果，结果发现，效率随着PANI百分比的增加而增加。还使用失重法评估腐蚀，对于8.70 mg的聚苯胺，保护效率的值达到97.43％。此外，此外，使用扫描电子显微镜观察最终样品的形态。耐腐蚀涂料必须具有最大的致密性，才能表现出显着的阻隔效果。网格测试使我们能够评估涂料的附着力，并显示出我们产品在加速腐蚀环境中的良好性能，并清楚地表明它们保留了其附着力。使用扫描电子显微镜观察最终样品的形态。耐腐蚀涂料必须具有最大的致密性，才能表现出显着的阻隔效果。网格测试使我们能够评估涂料的附着力，并显示出我们产品在加速腐蚀环境中的良好性能，并清楚地表明它们保留了其附着力。使用扫描电子显微镜观察最终样品的形态。耐腐蚀涂料必须具有最大的致密性，才能表现出显着的阻隔效果。网格测试使我们能够评估涂料的附着力，并显示出我们产品在加速腐蚀环境中的良好性能，并清楚地表明它们保留了其附着力。

• 强调

• 聚苯胺和磷酸锌（ENAP提出）作为防腐剂的用途。

• 通过两种方法，一种是实验性的，另一种是理论性的，实现了所研究涂层的抑制效果。

• 效率随着PANI百分比的增加而增加。

• 使用失重测试和中性盐雾测试（NSS）研究了低碳钢的腐蚀抑制作用。