CORROSION OF STAINLESS-STEELS IN COOKING LIQUORS OF THE PAPER AND PULP INDUSTRY

The electrochemical behavior of stainless steels in corrosive media of the paper and pulp industry was studied (one- and two-step pulp cooki ng at pH 1.20-6.25, T = 50-150 degrees C, C-SO2 = 3.0-106.0 g/l, and m inimum Mg(OH)(2) content in lignosulfonic acid 1.6 g/l). Fitting corro sion of the most widely used 10X17H13M2T steel was studied in natural and laboratory media, and the role of the concentration of Na2S2O8 (1. 0-20.0 mM) in pitting corrosion was studied in (g/l) H2O + 3.0 SO2 + 2 .0 Cl-. It was shown that the existing sulfite acid and bisulfite tech nological processes can be replaced by new pulp cooking techniques.