Microstructure of coupled Al/gray cast iron obtained by molding and its effect on mass loss

作     者：Mohamed Bouitna Naima Boutarek-Zaourar Samir Mansour Samir Mourad Chentouf Eric Mossang 

作者机构：Laboratory of Materials TechnologyFaculty of Mechanical Engineering and Process EngineeringUniversity of Science and Technology Houari BoumedieneB.P.32 El Alia16111 AlgiersAlgeria Department of Mechanical EngineeringSchool of Technology Superior1100 Notre-Dame Street WestMontrealQuebec H3C 1K3Canada NEEI InstituteNational Center for Scientific Research25rue des MartyrsBO 16638042Grenoble CedexFrance 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2018年第15卷第5期

页      面：378-383页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：gray cast iron aluminum coating treatment in the mold mass loss 

摘      要：This study aims to consolidate the surface of gray cast iron with aluminum deposition by developing a method that combines the preparation and surface treatment in a single operation. The effect of the wall thickness of the castings on the microstructure of the formed layers was studied, and two thicknesses, 8 mm and 25 mm, were studied. The formation of a continuous and homogeneous rich aluminum layer on the surface of the cast iron was observed. The formed layer is composed of two successive zones identified as two proeutectoid phases FeAl+FeAl/FeAl2 and single-phase FeAl, which significantly increases the surface hardness. Furthermore, this change in surface composition makes it possible to reduce the mass of the immersed samples in a 1 M hydrochloric acid solution during different exposure times(1 to 4 days). Consequently, a clear improvement in the corrosion resistance of the treated layers is highlighted.