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首页> 外文期刊>Progress in Organic Coatings: An International Review Journal >Salicylaldehyde azine-functionalized polybenzoxazine: Synthesis, characterization, and its nanocomposites as coatings for inhibiting the mild steel corrosion
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Salicylaldehyde azine-functionalized polybenzoxazine: Synthesis, characterization, and its nanocomposites as coatings for inhibiting the mild steel corrosion

机译：Salicyldehyde酮官能化聚苯细胞：合成，表征及其纳米复合材料作为用于抑制温和钢腐蚀的涂层

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In this work, we have successfully designed a new simple salicylaldehyde azine-functionalized benzoxazine (Azine-BZ - CH3) monomer via Mannich condensation reaction of 1,2-bis(2,4-dihydroxybenzylidene)hydrazine and paraformaldehyde with p-toluidine. FT-IR and NMR spectroscopy were carried to confirm the chemical structure of Azine-BZ - CH3. Based on DSC analyses, our BZ monomer showed the lowest maximum exothermic peak (237 degrees C) compared with 3-phenyl-3,4-dihydro-2H-benzooxazine monomer (263 degrees C), which ascribed to the basic characteristics of phenolic groups (OH) and the presence of the azine group in the benzoxazine monomer. Furthermore, the anticorrosion behavior of mild steel electrodes coated by Azine-BZ -CH3 , poly(AzineBZ - CH3), poly(Azine-BZ -CH3)/nanoclay and poly(Azine-BZ -CH3)/ E-SBO (epoxidized soybean) and E-bpc (epoxy resin of bisphenol-C) exposed to 1.0 M H2SO4 aqueous solution is studied by the potentiodynamic polarization. The results show decrease in both anodic and cathodic slopes of Tafel plots of the used inhibitors than a mild steel bar exposed to acidic media to indicate that these inhibitors act as mixed type inhibitors. Moreover, these inhibitors can be used as hybrid inhibitors where the anode and cathode slope of their Tafel curves used were lower than those of mild steel exposed to acidic media. In addition, the mild steel coated by epoxy E-SBO with poly(Azine-BZ - CH3)/nanoclay has more efficient corrosion protection (99.63%) than other used inhibitors. SEM images also confirmed that the protective layer of that inhibitor on the mild steel surface retards the corrosion when the electrodes are exposed to acidic media.
机译：在这项工作中，我们已经成功设计了一种通过1,2-双（2,4-二羟基苄基）肼和具有对甲苯胺的多聚甲醛的曼尼希缩合反应的新的简单水杨醛含有新的Salicyldehya官能化苯并恶嗪（Azine-BZ-CH3）单体。携带FT-IR和NMR光谱以确认Azine-BZ-CH3的化学结构。基于DSC分析，与3-苯基-3,4-二氢-2H-苯并恶嗪单体（263℃）相比，我们的BZ单体显示最大的最大放热峰（237摄氏度），其归因于酚醛基的基本特征（哦）和苯并恶嗪单体中的三嗪基团的存在。此外，通过Azine-Bz -CH3，聚（AzineBZ-CH3），聚（Azine-BZ-CH3）/纳米粘土和聚（Azine-BZ -CH3）/ E-SbO（环氧化大豆）（环氧化大豆）的防腐蚀行为（环氧化大豆）（环氧化大豆）（环氧化大豆）通过电压极化研究了暴露于1.0MH2SO4水溶液的1.0MH2SO4水溶液中的E-BPC（双酚-C的环氧树脂）。结果表明，二碳抑制剂的氧化性和阴极倾斜的阳极和阴极倾斜度的降低，比暴露于酸性介质的低碳钢棒，表明这些抑制剂充当混合型抑制剂。此外，这些抑制剂可用作杂种抑制剂，其中所用Tafel曲线的阳极和阴极坡度低于暴露于酸性介质的低碳钢。此外，通过环氧E-SbO与聚（氮杂-BZ-CH3）/纳米粘土涂覆的温和钢具有比其他抑制剂更有效的腐蚀保护（99.63％）。 SEM图像还证实，当电极暴露于酸性介质时，温和钢表面上该抑制剂的保护层延迟了腐蚀。

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