SBIR Phase I: Hydrotalcite-Based Conversion Coatings for High Copper-Content Aluminum Alloys

SBIR 第一阶段：用于高铜含量铝合金的水滑石基转化膜

• 批准号: 9860554
• 负责人: King-Tsai Jeng
• 金额: $ 10万
• 依托单位: Lynntech, Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9860554&HistoricalAwards=false
• 关键词: SBIR; Phase; Hydrotalcite; Based; Conversion

9860554 This Small Business Innovation Research Phase I project is to develop chromate-free conversion coatings for high copper-content aluminum alloys, such as 2024-T3, based on the formation of hydrotalcite. Chemical conversion coatings have found widespread commercial and military applications in the protection of aluminum alloys, commonly used in automobile and aircraft manufacturing as structural materials. This is due to their excellent corrosion resistances and their abilities to serve as effective bases for paints. However, conventional chemical conversion baths contain hexavalent chromium and ferricyanide, which are highly toxic. The continued use of chromate conversion coatings has made the metal finishing industry one of the most significant contributors to environmental pollution. Thus, it is highly desirable to develop conversion-coating technologies utilizing non-chromate chemicals that can serve as alternative methods. The key to this project is the use of environmentally benign chemicals to form hydrotalcite-based coatings with excellent corrosion resistances. Conversion coatings will be performed with the aid of activators under optimal temperatures to accelerate the reaction rate. The formed coatings will be further treated with a simple organic compound to obtain hydrophobic and self-healing characteristics to enhance their corrosion resistances. The developed non-chromate, hydrotalcite-based conversion coating process could totally replace the polluting chromate conversion coating in metal finishing. This novel technology will be economically viable and be very beneficial with respect to environmental protection and human health.

9860554这个小型企业创新研究第一阶段的项目是基于水滑石的形成，开发用于高铜含量铝合金(如2024-T3)的无铬转化涂层。铝合金是汽车和飞机制造中常用的结构材料，化学转化膜在保护铝合金方面有着广泛的商业和军事应用。这要归功于它们优异的耐腐蚀性和作为涂料的有效基料的能力。然而，传统的化学转化浴含有剧毒的六价铬和铁氰化物。铬酸盐转化涂层的持续使用使金属涂装行业成为环境污染的最大贡献者之一。因此，开发利用非铬酸盐化学物质作为替代方法的转化涂层技术是非常必要的。该项目的关键是使用环境友好的化学品来形成具有优异耐腐蚀性的水滑石基涂层。转化涂层将在最佳温度下借助活化剂进行，以加快反应速度。形成的涂层将进一步用一种简单的有机化合物处理，以获得疏水和自愈特性，以增强其耐腐蚀性。开发的无铬水滑石基转化膜工艺完全可以替代金属精加工中污染严重的铬酸盐转化膜。这项新技术在经济上是可行的，在环境保护和人类健康方面也非常有益。