项目名称： 基于干胶转化法铝合金表面防腐沸石膜的制备及其性能研究

项目编号： No.21501196

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 仝晓强

作者单位： 中国民航大学

项目金额： 20万元

中文摘要： 作为飞机的主要机用材料，航空铝合金表面的防护非常关键。传统的含铬防护涂层具有强致癌毒性，因此急需人们开发新的高效而环境友好型防护涂层。本项目以耐腐蚀性优良、无毒且具有抗菌活性的高硅沸石涂层为研究对象，利用低耗高效的干胶转化法在航空铝合金表面制备致密沸石涂层，有效避免了传统原位晶化、二次生长法的诸多弊端。涂层制备过程中，除了系统调变温度、时间、凝胶组分等常规条件，我们还采用阳极氧化的新策略对铝合金载体进行预处理，并在干胶中添加晶种改善沸石涂层的晶化。涂层性能研究中，我们不仅使用电化学测试、纳米压痕、划痕等常规表征技术，而且结合工业标准中常用的盐雾试验、划格法进行实际性能测试。本项目旨在寻求一种高效低耗、适于工业化的沸石膜制备路线，制备出铝合金表面高效无毒的沸石防护涂层，并尝试初步理解干胶转化过程中铝合金表面沸石涂层形成的内部机制。

中文关键词： 沸石；铝合金；阳极氧化；干胶转化法

英文摘要： As a most commonly used materials in aircraft, it is very important that prevent aero aluminum alloy from corrosion and wear. Due to carcinogenicity and toxicity of traditional Cr-contained protective coatings, a novel and more environmentally acceptable substitute is needed urgently. In the program, we focus on non-toxic high-silica zeolitic membranes with excellent corrosion protection and antimicrobial activity. To avoid disadvantages caused by conventional methods(in-situ crystallization and secondary crystallization method), the dense zeolite membranes supported on aluminum alloy will be prepared by a dry gel conversion method in our study. During experiments, besides varying conventional synthesis factors such as crystallization temperature, time, gel composition, a novel support pretreatment technique of anodic oxidation combined seeding synthesis strategy will be employed to improve crystallization of zeolite coatings. Lab characterization contained electrochemical, nanoindentation and nanoscratch techniques will be used, furthermore, some methods widely used in industry standards such as salt spray and scribe-grid test will play a important role in performance evaluation of as-synthesized coatings. The program will be aimed at the following three points: seeking a low power high performance route to synthesized dense zeolite membranes on aluminum alloy; preparation of non-toxic high-silica zeolitic membranes with excellent corrosion protection; preminary understanding of zeolitic coatings formation mechanism during dry gel conversion process.

英文关键词： Zeolite;Aluminum Alloy;Anodic Oxidation;Gel Conversion Method