基于酸洗废水制备多孔铁碳合金及其电位腐蚀研究  

RESEARCH ON PREPARATION AND GALVANIC CORROSION OF POROUS IRON-CARBON ALLOY BASED ON ACID PICKLING WASTEWATER

作　　者：郝素菊[1] 李欣芳[1] 蒋武锋[1] 张玉柱[1,2] 郝华强[2] 

机构地区：[1]华北理工大学冶金与能源学院,现代冶金技术教育部重点实验室,河北唐山063009 [2]东北大学冶金学院,辽宁沈阳110819

出　　处：《上海金属》2016年第4期58-62,共5页Shanghai Metals

基　　金：国家自然基金资助项目(No.51174075,No.51274084);河北省自然基金资助项目(No.E2012209024,No.E2014209157)

摘　　要：通过沉淀法回收酸洗废水中的铁元素,还原制备多孔铁碳合金。淀粉既是制备多孔铁碳合金的造孔剂,也是合金的碳源。沉淀烘干后,经过煅烧,再在不同的温度下用氢气还原得到产物。通过SEM、EDS和XRD表征了还原产物的微观形貌和组成,探究了淀粉添加量、还原温度等因素对多孔铁碳合金的形貌、平均粒径的影响,并利用电化学工作站测定了样品的电化学性能。结果表明,在650-800℃范围内,随着还原温度的升高,产物的平均粒径呈逐渐增大的趋势,平均粒径为45-85 nm。淀粉添加量为22%,还原温度为750℃是制备多孔铁碳合金最适宜的条件,制得的样品中C质量分数为3.06%,Fe质量分数为96.94%,且在此条件下所得产物样品的耐腐蚀性能较好。Iron element in acid pickling wastewater was recycled by precipitation, and porous iron carbon alloy was prepared by reduction. Starch was not only the pore-forming agent of preparing porous iron-carbon alloy, but also was the carbon source of the alloy. After precipitation drying, calcining, then the reduction products were prepared under different reduction temperatures. The microstructure and composition of the reduction products were characterized by SEM,EDS,XRD and X-ray energy spectrum. The influence of the starch amount and the hydrogen reduction temperature on the morphology and the average particle size of porous iron-carbon alloy was researched. The electrochemical properties of the samples were determined by electrochemical workstation. The results showed that the average particle size of the products presented a trend of gradual increase in the range of 45 to 85 nm with the increase of reduction temperature from 650 to 800 ℃. The starch amount of 22% and the hydrogen reduction temperature of 750 ℃ were the most suitable conditions, with the mass fraction of C being 3.06%, and the mass fraction of Fe being 96.94% in the sample. Under this condition, the samples of the products had a good corrosion resistance.

关 键 词：酸洗废水 淀粉添加量 还原温度 多孔铁碳合金 电位腐蚀 

分 类 号：TG113.14[金属学及工艺—物理冶金]