Corrosion characteristics of a quenching and partitioning steel determined by electrochemical impedance spectroscopy

20th Chemnitz Seminar on Materials Engineering - 20. Werkstofftechnisches Kolloquium

Mehner, T.^1 ; Morgenstern, R.^1 ; Frint, P.^2 ; Scharf, I.^1 ; Wagner, M.F.-X.^2 ; Lampke, T.^1

Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, Chemnitz

09107, Germany^1

Materials Science Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, Chemnitz

09107, Germany^2

关键词: Advanced high strength steel;    Corrosion behaviour;    Corrosion characteristics;    Experimental methods;    Processing Route;    Quenching and partitioning;    Time evolutions;    Ultimate tensile strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/373/1/012003/pdf
DOI  :  10.1088/1757-899X/373/1/012003

来源: IOP

【 摘 要 】

Among the advanced high-strength steels, quenching and partitioning (Q&P) steels provide excellent ultimate tensile strength in combination with good ductility. The mass fraction of martensite and austenite can be tailored by the Q&P treatment. In this study, the impact of the microstructure on the corrosion behaviour is investigated. For this, the microstructures of two Q&P processing routes and a quenched and tempered state are analysed using scanning electron microscopy and X-ray diffraction. Electrochemical impedance spectroscopy is conducted using two different media in order to determine the time evolution of corrosion rates during short-time corrosion. The results of this study demonstrate that correlations between Q&P microstructures and the corrosion behaviour can be analysed in detail with these experimental methods.