地热水管道防腐涂层的研究

地热水防腐涂层的耐温性和耐水性，利用高硅含量成膜物并配合颜填料，制备了一种常温固化涂料。通过对涂层的综合性能测试，确定涂料的优化配方为（质量分数）：环氧改性有机硅树脂SMH-30 50%～60%、云母氧化铁灰 22%～30%、绢云母 9%～14%、固化剂 4.5%～6%、分散剂0.2%～0.5%、消泡剂0.1%～0.4%；热重-差示扫描分析涂层的分解温度为216.4℃；全反射红外光谱分析结果显示，涂层在120℃ 的腐蚀模拟液中性能稳定；在质量分数为35%的氯化钠溶液中浸泡30d后，涂层的交流阻抗值在10⁸Ω/cm²以上，表明涂层具有良好耐腐蚀性能。

Study of an anti-corrosive coating for pipelines in geothermal water

By using a film-forming resin with a high silicon content and selecting suitable pigments and fillers, an anti-corrosive coating has been developed with enhanced heat-resistance and water-resistance. By evaluating the overall performance, the optimized formulation of the coating was found to be as follows: epoxy modified silicone resin SMH-30 50%-60%, micaceous iron oxide gray 22%-30%, sericite 9%-14%, curing agent 4.5%-6%, dispersant agent 0.2%-0.5%, and antifoaming agent 0.1%-0.4%. The decomposition temperature of the coating, as determined by thermogravimetry-differential scanning calorimetry (TG-DSC), was 216.4℃. Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy showed that the coating was stable in a corrosive solution at 120℃. After immersion in a 3.5% NaCl solution for 30 d, the resistance of the coating remained above 10⁸Ω·cm². This indicates that the coating imparts good corrosion resistance.