2013 Fiscal Year Final Research Report

Study on cut-edge corrosion mechanism of galvanized corrosion and improvement of corrosion resistance by utilizing multiphysics analysis

Research Project

Project/Area Number	23560861
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Material processing/treatments
Research Institution	Tokyo Institute of Technology
Principal Investigator	TADA EIJI 東京工業大学, 理工学研究科, 准教授 (40302260)
Project Period (FY)	2011 – 2013
Keywords	電位分布 / 電流分布 / イオン分布 / 腐食生成物
Research Abstract	This study focused on cut-edge corrosion mechanism of galvanized steels. In order to investigate anodic and cathodic reactions on steels with Zn corrosion products formed in 1 M NaCl and 1 M MgCl2, electrochemical microcell technique was employed. The morphology and compositions of Zn corrosion products formed on the steels depended on solution compositions and the distance from zinc coating layer. In addition, cathodic reaction was suppressed to some extent by deposition of the corrosion products. On the other hand, anodic reaction was suppressed on steel significantly by precipitation of the corrosion products containing Mg.