Electrochemical high-throughput characterization of metallic micro samples (SFB 1232)
Electrochemical impedancy as a function of martensite content. Impedance and corrosion resistance decrease with increasing martensite content.
Polarization scan of untreated and heat treated steel. The heat treatment influences the micro structure of the steel and changes the electrochemical corrosion behavior of the material.
Simulation of passsive layer growth reveals the influence of martensite content on growth kinetics (k20).
Cyclic voltammograms of different alloys in 0.1 M phosphate buffer. The stainless steel (X5CrNi18-10) shows a lower passive current and thus a better passivation.
Electrochemical impedance measurements of cold formed stainless steel. Due to different forming velocities (v = 10mms-1/5 mms-1/1 mms-1) different martensite contents can be achieved. These differences lead to changes in the passivity and thus the electrochemical impedance.
Corrosion damage due polarisation scans in different electrolytes; left: 0.1 M phosphate buffe with 3.5 wt.-% NaCl; right: pure 3.5 wt.-% NaCl solution. By adding phosphate buffer tot he electrolyte (left) pure pitting corrosion can be observed. Without phosphate buffer the pitting corrosion is overlapped by additional dissolution processes.
Height profile after pitting corrosion on cold formed stinless steel
- File name: IBosing_Eurocorr2018_Presentation.pdfLast update: 20.09.2018