Benzoxazine (Bz)-based hybrid sol-gel coating (TEOS-PBz) was prepared by compositing benzoxazine functional silane and Tetraethoxysilane (TEOS) and its distinct crosslinking structures were controlled by a designed curing procedure. The coatings' structures were analyzed by Fourier transform infrared spectroscopy, X-ray photoelectron spectrums and differential scanning calorimetry. It is evident that a prolonged curing procedure could promote curing of Bz functionality completely with high crosslinking degree in the coating, which is a key factor to the coatings' corrosion resistance. The hydrophobicity of the coating is also taken into account as this is also one of the factors affecting the corrosion protection performance. According to the result of electrochemical impedance spectroscopy, the TEOS-PBz with the maximum static water contact angle of 105.6 ± 0.4° showed the highest impedance with the value of R_ct above 10⁵ Ω after being immersed in 3.5 wt% NaCl aqueous solution for one week, more than one order of magnitude higher than traditional Tetraethoxysilane-Glycidoxypropyltriethoxysilane (TEOS-GPTES) hybrid sol-gel coating. It is possible to conclude that complete curing crosslinking structure with the conversion of Bz structure >94 % and high hydrophobicity contributed by less intermolecular hydrogen bonding ratio in the coating presented better corrosion protection performance.

苯并恶嗪 (Bz) 基混合溶胶-凝胶涂层 (TEOS-PBz) 由苯并恶嗪官能团硅烷和四乙氧基硅烷 (TEOS) 复合制备，其独特的交联结构通过设计的固化程序控制。通过傅里叶变换红外光谱、X射线光电子能谱和差示扫描量热法分析涂层的结构。很明显，延长的固化过程可以促进Bz官能团的完全固化，涂层的交联度高，这是涂层耐腐蚀性的关键因素。涂层的疏水性也被考虑在内，因为这也是影响防腐性能的因素之一。根据电化学阻抗谱的结果，在3.5 wt% NaCl水溶液中浸泡一周后， R _ct在10 ⁵  Ω以上，比传统的四乙氧基硅烷-缩水甘油氧基丙基三乙氧基硅烷（TEOS-GPTES）杂化溶胶-凝胶涂层高一个数量级以上。可以得出结论，完全固化的交联结构，Bz结构的转化率>94%，并且由于涂层中分子间氢键比较小而具有较高的疏水性，因此具有更好的防腐性能。