Abstract Biobased polyurethane coatings derived from vegetable oils, with 2 different compositions, were prepared and applied on the AA1200 aluminum alloy to confer corrosion protection. The influence of the ratio between the polyester (flexible segment) and the prepolymer (rigid segment) was investigated. Infrared spectroscopy studies evidenced the difference between the areas of the bands ( NH) and optical and scanning electron microscopy evidenced the morphological features of the coating surface before and after immersion in aggressive medium. The barrier properties and anti-corrosion performance of the coatings were evaluated by electrochemical impedance spectroscopy and the results revealed an increase of impedance over the immersion time. Localized corrosion studies confirmed the self-healing effect in coatings formulated with the highest content of polyester.

中文翻译：

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基于有机涂层中氢键的自修复能力，用于 AA1200 的腐蚀防护

摘要 制备了具有 2 种不同成分的源自植物油的生物基聚氨酯涂料，并将其涂在 AA1200 铝合金上以提供腐蚀保护。研究了聚酯（柔性链段）和预聚物（刚性链段）之间的比例的影响。红外光谱研究证明了带 (NH) 区域之间的差异，光学和扫描电子显微镜证明了浸入腐蚀性介质之前和之后涂层表面的形态特征。通过电化学阻抗谱评估涂层的阻隔性能和防腐性能，结果显示阻抗随着浸泡时间的增加而增加。