In this report, novel series of unsaturated polyesters Va­d and VIa­d containing indazole moiety were successfully prepared via interfacial polycondensation technique of indazole derivatives III and IV with different aromatic and aliphatic acid chlorides; isophthaloyl­, terephthaloyl­, adipoyl­, and sebacoyl chlorides. The prepared polyesters were categorized by elemental analyses, IR, ¹H NMR, Mass spectra, GPC, Thermogravimetric (TGA), X-ray analyses (XRD), and therefore the morphology was examined by scanning microscopy (SEM). They showed high thermal stability and different morphology structure. The corrosion protection performance of prepared polyesters Va­d and VIa­d on X65­steel in molar oil of vitriol was assessed using potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and SEM. Electrochemical tests (EIS and PDP) displayed polymers could efficiently impede the X65­steel corrosion and acted as inhibitors of the mixed type. At the optimal dose of 150 mg/L, the protection capacities of V_a-d and VI_a-d polymers ranged from 86.9% to 97.8%. adsorption of Va­d and VIa­d followed the adsorption model of Langmuir isotherm. Surface morphology examination by SEM also revealed that Va­d and VIa­d polymers form an efficient block layer on the surface of X65­steel to separate the acidic solution.

在本报告中，通过吲唑衍生物III和IV与不同芳族和脂族酰氯的界面缩聚技术，成功制备了含有吲唑部分的新型不饱和聚酯Vad和VIad系列；间苯二酰、对苯二酰、己二酰和癸二酰氯。制备的聚酯通过元素分析、IR、¹H NMR、质谱、GPC、热重(TGA)、X射线分析(XRD)，因此通过扫描显微镜(SEM)检查形态。它们表现出高的热稳定性和不同的形态结构。使用动电位极化 (PDP)、电化学阻抗谱 (EIS) 和 SEM 评估了制备的聚酯 Vad 和 VIad 在 X65steel 上在硫酸摩尔油中的腐蚀防护性能。电化学测试（EIS 和 PDP）显示聚合物可以有效地阻止 X65 钢腐蚀并作为混合类型的抑制剂。在 150 mg/L 的最佳剂量下，V _a-d和VI _a-d的保护能力聚合物的范围从 86.9% 到 97.8%。Vad和VIad的吸附遵循Langmuir等温线吸附模型。通过 SEM 进行的表面形态检查还表明，Vad 和 VIad 聚合物在 X65steel 表面形成有效的阻挡层以分离酸性溶液。