Corrosion resistance of electropolished AISI 304 stainless steel in dependence of temperature

Development of Materials Science in Research and Education

Zatkaliková, V.^1 ; Markoviová, L.^1

University of ilina, Faculty of Mechanical Engineering, Department of Material Engineering, Univerzitná 8215/1, ilina

01026, Slovakia^1

关键词: AISI-304 stainless steel;    Chloride solutions;    Cyclic potentiodynamic polarization;    Elevated temperature;    Microscopic observations;    Specimen surfaces;    Testing procedure;    Uniform corrosion;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/465/1/012011/pdf
DOI  :  10.1088/1757-899X/465/1/012011

来源: IOP

【 摘 要 】

AISI 304 is Cr-Ni austenitic stainless steel currently used for numerous applications that require high corrosion resistance. Due to the passive surface film this steel is resistant against a uniform corrosion, but halides present in environment can evoke local pitting. Electropolishing is recommended to obtain the high quality passive film and to increase the pitting corrosion resistance. This paper is focused on the assessment of the effect of elevated temperature (50 °C) on the resistance of AISI 304 electropolished surface to pitting corrosion in acidified 1 M chloride solution. Evaluation is based on the results of electrochemical cyclic potentiodynamic polarization tests (determination and comparison of pitting potentials Ep ) and on the microscopic observation of specimen surfaces attacked by pitting during performed testing procedure.