Improvement to anti-rust property of hot rolled rebar by compact oxide scale

作     者：陈庆安 刘立忠 刘鑫 刘相华 CHEN Qing-an;LIU Li-zhong;LIU Xin;LIU Xiang-hua

作者机构：State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 China College of Mechanical and Equipment Engineering Hebei University of Engineering Handan 056038 China School of Material and Metallurgy Northeastern University Shenyang 110819 China Research Academy Northeastern University Shenyang 110819 China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2017年第24卷第12期

页      面：2813-2818页

核心收录：

学科分类：0810[工学-信息与通信工程] 080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Project(51374069) supported by the National Natural Science Foundation of China 

主　　题：hot rolled rebar anti-rust property compact oxide scale oil–water emulsion cooling 

摘      要：A method was proposed to improve the anti-rust property of hot rolled rebar, which uses oil–water emulsion cooling instead of water cooling after hot rolling. The experiments were carried out by two cooling methods, one cooled by water, the other cooled by oil–water emulsion. The results of wet/dry cyclic accelerated corrosion test showed that the anti-rust property of rebar cooled by oil–water emulsion was better than that by water obviously. The results of OM, SEM and EPMA analysis indicated that these two scales contained three layers: an outer Fe_3O_4 layer, an intermediate Fe O layer with island-shaped pro-eutectoid Fe_3O_4, an inner eutectoid Fe_3O_4 layer. For the water cooled rebar, all three layers of oxide scale were relatively thin. Moreover, the scale had plenty of defects such as porosity, and crack. However, for the oil–water emulsion cooled rebar, all three layers of oxide scale were relatively thick and compact, which played an important role in protecting the rebar from atmospheric rust.