摘要： 【目的】为解决带锈金属基体表面处理难题，制备了复配功能酸环氧带锈防腐涂料。【方法】筛选出单宁酸（TA）、没食子酸（GA）和水杨酸（SA）作为铁锈转化剂，通过四因素三水平正交试验设计，将复配铁锈转化剂与环氧树脂、固化剂和填料构建复合涂层。综合运用金相显微镜、扫描电镜（SEM）、EDS元素分析、电化学阻抗谱（EIS）系统表征转化膜微观结构演变及涂层腐蚀防护行为，并通过中性盐雾实验（NSS）验证防护效果。【结果】由双酚 F型环氧树脂、酚醛胺固化剂、磷酸锌、单宁酸和没食子酸复配铁锈转化剂制备的复合涂层在 3. 5%NaCl溶液中浸泡 2 000 h后，Rct达 9. 533×1010 Ω·cm2，且基于带锈钢板涂层的防腐性能优于裸钢样板涂层，盐雾试验显示，涂层划痕处的腐蚀产物未出现扩散蔓延及其他劣化现象。【结论】采用最优涂料配方（DER354树脂 23. 7%、LITE 2009固化剂 6. 4%、磷酸锌 57. 9%、单宁酸 2%、没食子酸 2%、稀释剂 6%、助剂 2%）制备的复配功能酸环氧带锈防腐涂料可有效防护带锈钢。
关键词:
铁锈转化剂,
环氧涂料,
防腐涂层,
交流阻抗技术,
中性盐雾试验
Abstract: ［Objective］ This study aimed to address the challenges associated with surfacetreatment of rusted metal substrates by developing a compound functional acid-epoxy rusty anti-corrosion coating.［Methods］Tannic acid（TA），gallic acid（GA）and salicylic acid（SA）were selected as rust converters. A four-factor，three-level orthogonal test design was employed to formulate the composite coating by combining the rust converter with epoxy resin curing agent and fillers. Metallographic microscopy，scanning electron microscopy（SEM），EDS elemental analysis，and electrochemical impedance spectroscopy（EIS） were used to systematically characterize the microstructure evolution of the conversion film and the corrosion and anti-corrosion behavior of the coating，and the protective performance was further validated by a neutral salt spray test（NSS）.［Results］The composite coating，formulated with bisphenol F-type epoxy resin，phenolic amine curing agent，zinc phosphate，and a blend of tannic acid and gallic acid as rust converters，exhibited a Rct of 9. 533×1010 Ω ·cm2 after 2 000 hours of immersion in a 3. 5%NaCl solution. Moreover，the anti-corrosion performance of the coating applied on the rusted steel plates surpassed that on bare steelsamples. The NSS showed that the corrosion products at the scribe on the coating did not spread or showany other signs of deterioration.［Conclusion］ The compound functional acid-epoxy rust anti-corrosion coating，prepared with the optimal coating formulation（DER354 resin 23. 7%，LITE 2009 curing agent 6. 4%，zinc phosphate 57. 9%，tannic acid 2%，gallic acid 2%，diluent 6%，additive 2%）， can provide effective protection for rusted steel.
Key words:
rust converter,
epoxy coatings,
anti-corrosion coating,
AC impedance spectroscopy,
neutral salt spray test
中图分类号:
张志良, 刘海兵, 张峰源, 等. 复配功能酸环氧带锈防腐涂料的制备及性能研究[J]. 涂料工业, 2025, 55(11): 34-42.
ZHANG Z L, LIU H B, ZHANG F Y, et al. Preparation and Anti-corrosion Performance of a Compound Functional Acid-epoxy Rust-tolerant Coating[J]. Paint & Coatings Industry, 2025, 55(11): 34-42.