1994 Volume 43 Issue 494 Pages 1387-1392
A micro-electrode consisting of an Ag/AgCl reference electrode was prepared by using the electroplating method on a tungusten wire as a corrosion current sensor for the scanning vibrating electrode technique (SVET), and it was applied to measure the corrosion current profile over a hardfacing alloy after corrosion in 10-3M sodium chloride. A good correlation was observed between the pitting corrosion current profile and the surface morphology of the corroded specimen. The pitting corrosion of the specimen developed in a chromium depleted zone between beads of weld metal, and manganese sulphide inclusions were always found in the pits along the chromium depleted zone.
