钢表面蕨类植物自组装膜的制作及其缓蚀性能研究

Corrosion and protection technology is a field of study has an important role in the development of the national economy. Steel is widely used as metal material, and its corrosion protection has been paid the close attention by the scholars in the field of corrosion. Natural plant extracts, due to its some active ingredients have the excellent properties of corrosion inhibition, become an environmentally friendly and renewable corrosion inhibitor. This project will deal with the results of comprehensive study on the active constituent of ferns extract as effective corrosion inhibitors for metal corrosion by self-assembly technology and its inhibition performance. Specific content includes: the extraction of the common ferns effective inhibition ingredients; the process optimization of the film formation on metal surface and the exploration for self-assembly rule; the study of corrosion protection performance of film using electrochemical methods; the comparative composition analysis between the plant extracts and the self-assembled film; the study of adsorption and inhibition mechanism about inhibitor molecules on the metal surface by using quantum chemical calculations and molecular modeling techniques. The purpose of this project is to lay a theoretical foundation for the development of a new corrosion inhibitor with environmental advantages, and an expansion of its application by using self-assembly techniques.

金属腐蚀与防护技术是一个对国民经济发展有着重要作用的研究领域。钢铁作为常用的金属材料,其腐蚀防护问题受到腐蚀领域学者们的密切关注。天然植物提取液中由于存在一些性质优良的缓蚀有效成分，是一种可再生的环境友好型缓蚀剂。本项目通过提取蕨类植物茎叶的有效成分作为缓蚀剂，利用自组装成膜技术在金属基底上制取缓蚀膜，进而对其抗腐蚀能力进行基础研究。具体内容包括：常见蕨类植物有效缓蚀成分的提取；金属表面成膜过程的优化与自组装规律的探索；利用电化学方法对组装膜缓蚀性能的研究；植物提取物与膜层成分的对比分析；利用分子模拟技术对缓蚀剂分子在金属表面的吸附及缓蚀机理的研究。本项目旨在为开发具有环境优势的新型缓蚀剂，利用自组装技术拓展其应用范围奠定一定的理论基础。

项目以云南常见蕨类植物提取液为原料，利用自组装技术在普通金属材料(碳钢)表面制备金属缓蚀膜，以电化学方法、光谱表征和量化计算为主要研究手段，研究缓蚀膜层的缓蚀性能及缓蚀机理，希望通过研究任务的完成达到预期成果。.(1) 蕨类植物缓蚀成分的提取：比较了不同科属的蕨类植物提取液对碳钢在腐蚀介质中的缓蚀性能，并以此为主要依据建立了相对经济且高效的植物缓蚀成分的提取方法。.(2) 金属表面组装膜的制备：利用植物缓蚀成分在不同介质中缓蚀性能，通过优化实验条件，利用自组装技术在金属表面制备缓蚀功能膜。.(3) 植物自组装膜的表征：采用分析仪器研究了碳钢表面自组装膜的微观结构和组成，得到了吸附膜层的主要成分和主要吸附基团。.(4) 组装膜的吸附模型和吸附机理：通过对实验数据进行的系统分析，利用所得热力学数据和表征及量化计算结果，研究了自组装膜的成膜及缓蚀机理。