The kinetics of the reduction of horseheart ferricytochrome c by sodium dithionite (phosphate buffer-sodium chloride; pH 6.5, mu = 1.0, 25 degrees ) features two reaction pathways; one with the rate constant k(3) = 1.17 x 10(4) M(-1) sec(-1), the other with the rate constant k(1)k(2)/k(-1) = 6.0 x 10(4) M(-1) sec(-1). These pathways are interpreted in terms of remote attack (possibly by way of ...

The acoustic nucleation threshold for bubbles trapped in cavities has theoretically been predicted within the crevice theory by Atchley and Prosperetti “The crevice model of bubble nucleation,” J. Acoust. Soc. Am. 86, 1065 1989 . Here, we determine this threshold experimentally, by applying a single pressure pulse to bubbles trapped in cylindrical nanoscopic pits “artificial crevices” with radi...

In the present work, existing Indian elastic rail clip steel (tempered martensite) is microstructurally modified to bainite using austempering route. Crevice corrosion of (ERC) major concern as metal dissolution can cause loosening assembly (such clipinsert and clipliner) lack performance. Furthermore, surface exposed atmosphere could also be affected by corrosive environment. The work concentr...

A new peridynamic (PD) model for crevice corrosion damage is introduced and cross-validated with experimental results from the literature. Electrochemical mechanisms are reduced to a simple metal-ion concentration-dependent rate. Computations over domains extreme aspect ratios like those seen in crevices efficiently performed by modifying PD formulation accommodate arbitrary-shape horizons. The...