基于纳米催化剂耗氧机制的主动防腐环氧涂层构筑及性能研究

doi:10.11902/1005.4537.2025.282

中国腐蚀与防护学报 DOI: 10.11902/1005.4537.2025.282

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基于纳米催化剂耗氧机制的主动防腐环氧涂层构筑及性能研究

程孟¹,李晓伟¹,胡松青²

1. 中国矿业大学
2. 中国石油大学（华东）

Nanocatalyst-mediated oxygen depletion for active corrosion protection in epoxy coatings

引用本文:

程孟李晓伟胡松青. 基于纳米催化剂耗氧机制的主动防腐环氧涂层构筑及性能研究[J]. 中国腐蚀与防护学报, 10.11902/1005.4537.2025.282.

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摘要: 刺激响应型防腐涂层通过将纳米容器分散于主体涂层中实现自修复功能，存在腐蚀后的修复特性。本文开发了一种新型纳米催化防腐涂层，该涂层通过催化耗氧机制有效延缓金属基体的化学腐蚀，显著延长其服役寿命。创新性地采用限域热解方法制备Co-N-C纳米催化剂，其氧还原反应半波电位达0.89 V，展现出优异的催化活性。将该催化剂引入环氧涂层后，体系表现出显著的防腐增强效应。在氧饱和的3.5 wt% NaCl溶液中浸泡30天后，涂层保持完整，基体金属无明显腐蚀迹象，防护性能显著优于纯环氧涂层。本文提出的催化耗氧防腐策略为抑制氧扩散，延长涂层使用寿命和提升防腐效果研究提供了新思路。

关键词 ： Co-N-C, 限域热解, 氧还原, 纳米催化防腐, 智能涂层

Abstract：A major concern about stimuli-responsive anticorrosion coatings, constructed by the distribution of guest nanocontainers into host coatings, is their characteristics of post repair after corrosion. Herein, a new oxygen-depleting coating is developed to protect the metal substrate from chemical attack and prolong service life. The core concept for this coating is introduced Co-N-C acting as excellent nanocatalyst to spontaneously accelerate inside oxygen depletion thereby improving the effectiveness of corrosion protection. Hollow Co-N-C derived from confined pyrolysis of MOF exhibits a half-wave potential of 0.89 V for the oxygen reduction reaction. As electrocatalyst for new anticorrosion coating, the coating shows superior anticorrosion properties compared to the pure polymer coatings. After 30 day’s immersion in oxygen saturated 3.5 wt% NaCl solution, no change occurs in the coating and the coated steel does not show any obvious corrosion. This effective elimination of oxygen diffusion in coatings will be a promising perspective for prolonging coating life and corrosion protecting effect.

Key words： Co-N-C confined pyrolysis oxygen reduction reaction nanocatalytic anticorrosion smart coatings

收稿日期: 2025-09-06

基金资助:国家自然科学基金

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