316L不锈钢在聚乳酸合成过程中腐蚀规律研究  

Corrosion behavior of 316L stainless steel in the preparation of PLA

作　　者：王凯[1] 郝红[1] 王斌[1] 韦雄雄[1] 曹亚虹[1] 梁建国[1] 

机构地区：[1]西北大学化工学院,陕西西安710069

出　　处：《西北大学学报（自然科学版）》2011年第3期455-458,共4页Journal of Northwest University（Natural Science Edition）

基　　金：陕西省13115科技创新工程重大科技专项基金资助项目(2007ZDKG-50);陕西省教育厅产业化基金资助项目(08JC04);西北大学研究生自主创新基金资助项目(10YZZ31)

摘　　要：目的研究不同金属材料在聚乳酸合成过程中的耐腐蚀性能。方法分别采用失重法和邻菲罗啉分光光度法测定聚乳酸合成反应中金属Ti,304和316L不锈钢的腐蚀速率。结果反应液中铁离子浓度随反应温度和反应时间的增长而增大,但当反应时间大于6 h时铁离子浓度基本保持稳定。316L不锈钢的腐蚀速率为0.264 2 mm/a,属于尚耐腐蚀。SEM分析316L不锈钢表面在合成聚乳酸过程中以点蚀为主。结论选取316L不锈钢作为反应器材质较为合适。Aim Study the corrosion resistence of different metal materials in the synthesis process of polylactic acid. Methods The corrosion rates of Ti, 304 stainless steel and 316L stainless steel in lactic reaction solution were analyzed by the weight loss method and o-phenanthroline spectrophotometry respectively. The effects of reac- tion time and reaction temperature on corrosion of 316L stainless steel were investigated in detail. Results The iron ion concentrations were increased with the prolonged reaction time and increased reaction temperature and stable when reaction time was 6 hours. The corrosion rate of 316L stainless steel was 0. 264 2 mm/a. 316L stainless steel in lactic solution had weak corrosion resistance. The SEM photographs showed the corrosion of 316L stainless steel was pitting corrosion in the preparation of PLA. Conclusion 316L stainless steel is suitable to be selected as the reactor material.

关 键 词：邻菲罗啉分光光度法 聚乳酸 316L不锈钢 腐蚀 

分 类 号：TG174.22[金属学及工艺—金属表面处理]