Activity: Talk or presentation › Poster presentation › Science to public
The tinting colors show a change of the corrosion potentials. The investigations are conducted on the most common stainless steel type AISI 304 / 1.4301 of surface conditions 2B (Skin Pass) and 2R (Bright Annealed) with different tinting colors, artificially produced, using a furnace. Later the tinting was removed on some samples by pickling method using the combination of Nitric acid and Hydro Fluoric acid in order to evaluate the effect of corrosion. Electrochemical linear polarization tests are performed on the tinted samples to investigate their corrosion resistance as a function of the Open Circuit Potential (OCP) and the Break Through Potential (BTP). Therefore, a standard three electrode set up in a 1l corrosion cell with a 5% NaCl electrolyte are used. Furthermore, the investigations are aimed to standardize the corrosion testing procedure and parameter finding for future corrosion investigations on stainless steels for different applications depending on their surface condition. The chromium-oxide layer analysis of the heat tinted samples was done by using the Energy Dispersive X-ray spectroscopy (EDS) method.