Impact–sliding fretting tribocorrosion behavior of 316L stainless steel in solution with different halide concentrations

Abstract Impact–sliding caused by random vibrations between tubes and supports can affect the operation of heat exchangers. In addition, a corrosive environment cause damage, accelerating synergism corrosion wear. Therefore, focus this work was impact–sliding fretting tribocorrosion behavior 316L exchanger at different halide concentrations. A device system incorporating in situ electrochemical measurements wear constructed, experiments on sodium chloride (NaCl) solution with concentrations (0.0, 0.1, 0.5, 1.0, 3.5, 5.0 wt%) were carried out. The also calculated analyzed. damage mechanisms elucidated correlating corrosion–wear synergism, morphologies, material loss rates. results indicated that stable stage occurred approximately 9–12 h, after which current increased expansion area. As concentration increased, scale scars gradually decreased, changing from being dominated cracks, delaminations, grooves to scratches, microgrooves, holes. There an obvious positive corrosion. pure mechanical enhanced corrosion, but contributed more than tangential sliding total mass range 0.0–0.5 wt% decreased 0.5–5.0 wt%. Large-scale corrosivity small-scale reduced lubricity low high concentrations, respectively.