Effect of the frequency on fretting corrosion behavior between Alloy 690TT tube and 405 stainless steel plate in high temperature pressurized water

The effect of fretting frequency on fretting corrosion behavior between Alloy 690TT heat-exchanger tube and 405 stainless steel plate in simulated secondary water of pressurized water reactor nuclear power plants was investigated. The wear volume and wear coefficient of 690TT tube increased initially and then decreased with increasing frequency, while wear volume and wear coefficient of corresponding 405 SS plate gradually increased. The mechanisms of friction and wear were analyzed in detail. The friction coefficient and the total dissipated energy deceased with increasing frequency, which is related to crack initiation and propagation. Moreover, wear mechanism changed from abrasive wear to oxidative wear and delamination as the stress increased. Finally, a predictive model of service life of 690TT tube was proposed.

Automated summary

The study investigated the effect of fretting frequency on fretting corrosion behavior between Alloy 690TT heat-exchanger tube and 405 stainless steel plate in simulated secondary water of pressurized water reactor nuclear power plants. It found that wear volume and wear coefficient of 690TT tube showed an initial increase then decrease with frequency, while those of corresponding 405 SS plate gradually increased. Friction and wear mechanisms varied accordingly, with changes in friction coefficient, dissipated energy, and wear mechanism observed.