Corrosion Inhibition of the Bi-enzyme Doped Epoxy Resin for Q235 Carbon Steel in Circulating Cooling Water

• 作者: Liu Fang Jiang Guofei Zhao Xiaoxuan Li Wei Che Yangli
• 来源期刊: 中国炼油与石油化工（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: Process Research
• 页码范围: 109-120
• 页数: 12页
• 语种: 英文

摘要

Carboxyl-functionalized SBA-15 (COOH/ SBA-15) was prepared by a one-pot synthesis method and characterized. COOH-SBA-15/LZM-LP, an immobilized bi-enzyme (lipase and lysozyme), was prepared using COOH/SBA-15 as a carrier. The orthogonal experiments were used to optimize the immobilization conditions with the index of corrosion inhibition. Electrochemical tests show that COOH-SBA-15/LZM-LP can significantly inhibit the corrosion of carbon steel in circulating cooling water. The corrosion inhibition rate was higher than 93% when the amount of COOH-SBA-15/LZM-LP was 0.2 g/L. The inhibition mechanism was proposed and discussed from the perspective of carboxyl and enzymes. Finally, when COOH-SBA-15/LZM-LP was doped into epoxy resin, the corrosion resistance of epoxy coatings can be significantly improved, and the corrosion resistance only decreased by 0.23% after 720 h of soaking.