The electrochemical behavior of the oxide layers on two metal-metal glassy alloys, Fe78Co9Cr10Mo2Al1 (VX9)and Fe49Co49V2 (VX50) (at.%), were studied using electrochemical techniques including electrochemical frequency modulation (EFM), electrochemical impedance spectroscopy (EIS) and cyclic polarization (CP) measurements. The morphology and composition of the alloy surfaces were investigated us...

The effects of alloying concentration on the aqueous corrosion behavior aluminum-manganese-molybdenum (Al-Mn-Mo) alloys with 8–20 at% Mn and 0–30 Mo were investigated by experiments atomistic simulations. pitting potential Al-Mn-Mo increased Mo% from − 0.16–0.49 V. passive film thickness depended total alloy concentration, while its compactness defect density individual ones. Specifically, Al80...

A hybrid actuated silicon-based micropump with dynamic passive valves is described in this paper. The actuator is based on a combination of thick-film and silicon micromachining technology and relies on the flexure of a membrane structure of lead zirconate titanate on silicon. Inlet and outlet valves use the passive dynamic principle, where flow direction is realized with a diffuser and a nozzl...

Two experiments are reported to investigate the roles of perceptual priming and lexical priming in Korean children s production of passive sentences. Experiment 1 examined whether manipulations of focal attention could affect Korean children s linguistic choices regarding subject role assignment, by using so-called fish film (Tomlin, 1997). 5-year-olds and 6-year-olds were not able to produce p...

High performance miniaturised and cost effective passive components are needed to enable commercially viable novel system level architectures for third generation wireless communication systems. In recent years there has been increasing interest in utilising passive multi-layer IC technologies to integrate Digital and RF functionality in a 3D manner. Examples of such enabling technologies that ...

The surfaces of all metals (except for gold) in air are covered with oxide films. When such a metal is immersed in an aqueous solution, the oxide film tends to dissolve. If the solution is acidic, the oxide film may dissolve completely leaving a bare metal surface, which is said to be in the active state. In near-neutral solutions, the solubility of the oxide will be much lower than in acid sol...

The surfaces of all metals (except for gold) in air are covered with oxide films. When such a metal is immersed in an aqueous solution, the oxide film tends to dissolve. If the solution is acidic, the oxide film may dissolve completely leaving a bare metal surface, which is said to be in the active state. In near-neutral solutions, the solubility of the oxide will be much lower than in acid sol...

A major route of exposure to hydrophobic organic contaminants (HOCs), such as benzo[a]pyrene (BaP), is ingestion. Matrix-bound HOCs may become bioavailable after mobilization by the gastrointestinal fluids followed by sorption to the intestinal epithelium. The purpose of this research was to measure the bioavailability of [14C]-BaP bound to pristine soils or field-contaminated sediment using an...

The existing form of copper and its release mechanism from the passive film Ti-7Cu alloy was studied by Quantitative analysis depth profile series electrochemical tests. Results were interpreted within Point Defect Model-II. Copper does not any p-type (cuprous or cupric) oxide but preferentially oxidises at metal/film interface segregated as Cu interstitials Cui+ become substituted CuTix' in ox...

The electrochemical behavior and passivation properties of 2507 super duplex stainless steel (SDSS) in the hot concentrated seawater with different concentrations at temperatures are characterized by methods X-ray photoelectron spectroscopy. passive film formed on SDSS belongs to n-type semiconductor mainly composed hydroxides oxides Fe Cr under all circumstances. protectiveness decreases incre...