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铝及铝合金是应用最广的金属材料之一,研究铝的防护和缓蚀具有重要意义.关于铝在酸性介质中的腐蚀及缓蚀剂国内外已有较多研究.近几年来,国内有人用植物萃取液制备的缓蚀剂对碳钢在盐酸介质中的缓蚀性能进行了评定,但用天然植物提取液作为在盐酸溶液中铝用缓蚀剂的研究还未见报导.我们以榨油后的菜籽饼为原料,用稀盐酸浸取得到一种棕红色提取液.实验结果表明,该提取液对纯铝在盐酸介质中有明显的缓蚀作用,缓蚀率达95%以上.此缓蚀剂原料来源广,成本低廉,提取工艺简单,产品无毒、无污染,缓蚀效果超过很多有机缓蚀剂,具有良好的应用前景.
Aluminum and aluminum alloy are one of the most widely used metal materials, and it is of great significance to study the protection and corrosion inhibition of aluminum.About the corrosion and corrosion inhibitor of aluminum in acidic medium, more studies have been done at home and abroad.In recent years, Corrosion inhibition performance of carbon steel in hydrochloric acid medium was evaluated by corrosion inhibitor prepared from plant extract, but there is no report on the research of using natural plant extract as aluminum corrosion inhibitor in hydrochloric acid solution. Oil after rapeseed cake as raw material, leaching with dilute hydrochloric acid to obtain a reddish brown extract.The experimental results show that the extract of pure aluminum in hydrochloric acid medium has a significant corrosion inhibition, corrosion inhibition rate of 95% or more The inhibitor has wide source of raw materials, low cost, simple extraction process, nontoxic product, no pollution and more corrosion inhibition than many organic corrosion inhibitors, and has good application prospect.