The effect of Ta addition on the pitting corrosion resistance duplex stainless steels was investigated in both cases without and with deoxidization/desulfurization by Al Ca. improved two proposed mechanisms. For Ca, MnS inclusions which act as initiation sites are modified to electrochemically-stable (Ta,Mn) oxysulfides. (CaS (Al,Ca)oxides) coated stable Ta-containing nitrides resulting suppres...

The evolution of nanoscale phase separation in the ferrite super duplex stainless steel 25Cr7Ni (wt%) (SDSS 2507) and two SDSS TIG (tungsten inert gas) weldments have been quantitatively investigated by small-angle neutron scattering (SANS). results show that is more pronounced comparison to base metal 2507, especially after aging for 35,000 h at 300 °C. These correlate with higher micro-hardne...

This work reports on the influence of β-lactoglobuline (β-LGB) and of its denaturation on the adherence of quartz particles, taken as a model of particulate soil, on stainless steel AISI 304 with mirror finish. The substrate was soiled with quartz suspensions in water or in β-LGB solutions as such or previously heated at 75°C, and dried at room temperature or in an oven at 75°C. Cleanability wa...

To measure the cleanability of stainless steel surfaces under standardized conditions, a test stand was set up. Three stainless steel plates (size 200 x 100 mm) can be fixed to the test stand and sprayed with a water jet from a low-pressure nozzle for a period of several minutes. The plates were previously soiled with a starch or protein film with a pre-defined layer thickness and dried for sev...