摘要： 【目的】针对目前钢渣亟需处理和环氧涂料中云母氧化铁成本高的问题。【方法】以钢渣制备的盾粉协同云母氧化铁作为填料，制备盾粉/云母氧化铁复合环氧防腐涂层。通过 X射线荧光光谱仪（XRF）、X射线衍射仪（XRD）及激光粒度分析仪（LPSA）分析填料的化学组成、物相结构与粒度分布，利用扫描电子显微镜（SEM）观察盾粉和涂层的微观结构；测试了涂层的铅笔硬度、柔韧性、附着力、耐冲击性、吸水率和防腐性能；利用接触角测量仪和电化学工作站测试涂层疏水性和电化学腐蚀行为。【结果】硬度较高的盾粉可在涂层中起到支撑作用，且其粒径小于云母氧化铁，可有效填补缝隙提高涂层密实度，阻碍腐蚀物质侵入涂层，从而提升涂层的力学性能和防腐性能。当盾粉与云母氧化铁质量比为 3∶1时，涂层综合性能最佳，铅笔硬度达到 5H、附着力为 0级、柔韧性为 11 mm、耐冲击性为 28 cm，水接触角为 83. 37°，7d吸水率为 0. 27%，阻抗模量为 5. 79×10⁶ Ω·cm²，腐蚀电位为.0. 11 V，腐蚀电流密度为 4. 39×10^-8 A/cm²，等效电路电阻为 1.27×10⁵ Ω·cm²。【结论】适量盾粉与云母氧化铁协同作为填料制备环氧防腐涂料，其综合性能优于单一云母氧化铁环氧防腐涂料

关键词: 钢渣, 盾粉, 云母氧化铁, 环氧树脂, 防腐涂层

Abstract: ［Objective］Aiming at the urgent need for steel slag treatment and the high cost of mica iron oxide in epoxy coatings.［Methods］A composite epoxy anti-corrosion coating was preparedusing shield powder derived from steel slag and mica iron oxide as fillers. The chemical composition， phase structure，and particle size distribution of the fillers were characterized by X-ray fluorescence spectroscopy（XRF）X-ray diffraction（XRD），and laser particle size analysis（LPSA）. The microstructure of shieldpowderandcoa，tings was observed using scanning electron microscope（SEM）. Coating properties including pencil hardness，flexibility，adhesion，impact resistance，water absorption，and anti-corrosion performance were tested. The hydrophobicity and electrochemical corrosion behavior were tested usinga contact angle meter and an electrochemical workstation.［Results］ The shield powder with highhardness can provide support within the coating. Its particle size is smaller than that of mica iron oxide， which can effectively fill gaps to improve coating compactness，and prevent corrosive substances from invading the coatings，thereby enhancing the mechanical and anti-corrosion properties of coatings. When themass ratio of shield powder to mica iron oxide was 3∶1，the coatings exhibited best comprehensive performance：pencil hardness 5H，adhesion grade 0，flexibility 11 mm，impact resistance 28 cm，contact angle 83. 37°，7-day water absorption 0. 27%，impedance modulus 5. 79×10⁶ Ω ·cm²，corrosion potential -0. 11 V，corrosion current density 4. 39×10^-8 A/cm²，and equivalent circuit resistance 1. 27×10⁵ Ω ·cm².［Conclusion］ Epoxy anticorrosive coatings prepared by using an appropriateamount of shield powder synergistically with mica iron oxide as fillers had better comprehensiveperformance compared to coatings using mica iron oxide alone.

Key words: steel slag, shield powder, mica iron oxide, epoxy resin, anti-corrosion coating

中图分类号: 

• TQ635. 2