POTENTIODYNAMIC INVESTIGATION INTO LEAD-BASED BABBIT BK (PbSb15Sn10K) WITH POTASSIUM IN 3 % NaCl ELECTROLYTE
Babbit PbSb15Sn10 is used for the manufacture of the bearing layer (cast, sintered, knurled) in multilayer thin-walled plain bearings,lightly loaded main and connecting rod bearings, liners, and thrust bearings. Babbitt PbSb15Sn10 is soft, has relatively good limited lubrication properties, low fatigue strength; works with hard and soft shaft. The results of the experimental study of the anodic behavior of lead babbit BK (PbSb15Sn10K) alloyed with 0,01 ÷ 1,0 wt. % potassium in an electrolyte medium of 3,0 % NaCl are presented. It is shown that potassium additions reduce the corrosion rate of the original PbSb15Sn10 alloy to 12 %. With an increase in the potassium concentration in the NaCl electrolyte, the corrosion and pitting potentials shift to the positive range of values.