摘要： 【目的】为实现无铬锌铝体系在超薄涂层条件下的高效防腐性能。【方法】构建了一种以氢化双酚A型环氧树脂为基体、片状锌铝粉为防锈颜料，并复配纳米氧化铟与PTFE改性聚乙烯蜡粉的多功能复合涂层体系。【结果】相较传统球状锌粉，片状锌铝粉通过面接触排列方式，显著提升涂层的导通性与物理屏蔽性能，且在铝粉质量占锌铝总质量7%时，可有效抑制Zn阳极溶解速率及白锈生成。适量添加纳米氧化铟（1%）能够增强涂层微观导电路径的稳定性，通过局部电子迁移与Cl⁻吸附协同机制，显著延长阴极保护周期。引入低熔点PTFE改性PE蜡粉，可实现在热固化过程中向涂层表面的定向迁移与富集，形成致密疏水表层，从而进一步阻滞腐蚀介质渗透，协同提升耐腐蚀性。【结论】该涂层体系在力学稳定性与耐腐蚀持久性方面表现优异，展示出作为绿色替代型锌铝防腐涂层的应用潜力。

关键词: 环氧树脂, 片状锌铝粉, 纳米氧化铟, PTFE改性蜡粉, 耐腐蚀性

Abstract: ［Objective］To achieve high-efficiency corrosion resistance of chromium-free Zn-Alsystem under ultrathin coating conditions.［Methods］A multifunctional composite coating system was constructed，using hydrogenated bisphenol A epoxy resin as the matrix，flake Zn-Al powder as the anti-rust pigment，and compounded with nano-indium oxide and PTFE-modified polyethylene wax powder.［Results］Compared with conventional spherical zinc powder，flake Zn-Al powder，arranged through face-to-face contact，significantly improves the coating′s conductivity and physical shieldingperformance. When the aluminum powder accounts for 7% of the total zinc-aluminum mass，it can effectively inhibit the dissolution rate of the Zn anode and the formation of white rust. The appropriateaddition of nano-indium oxide（1%）can enhance the stability of the coating′s microscopic conductive pathways，and through the synergistic mechanism of local electron migration and Cl⁻ . adsorption， significantly extend the cathodic protection period. The introduction of low-melting-point PTFE-modified PE wax powder allows for directional migration and enrichment to the coating surface duringthermal curing，forming a dense hydrophobic surface layer that further blocks the penetration of corrosive media，thereby synergistically enhancing corrosion resistance.［Conclusion］ This coating system demonstrates excellent mechanical stability and long-lasting corrosion resistance，showing potential as a green alternative Zn-Al anti-corrosion coating.

Key words: epoxy resin, flake Zn-Al powder, nano-indium oxide, PTFE-modified wax, corrosion resistance

中图分类号: 

• TQ635. 2