In this study, effects of pre-oxidation on the hot corrosion behaviour Al–Si coatings in a Na2SO4 and 25 w/% NaCl mixture at 900 °C were investigated. The results showed that after 120 h corrosion, large amount β-NiAl residual was found with no obvious sulphides or oxidation pre-oxidised coating. pre-formed oxide film coating prevented external O2– species such as S2– Cl– from molten salts dire...

Gaseous impurities, such as O2, are expected to be present within CO2 captured for storage. This could stimulate microbial activity in a geological storage site which has the potential lead operational issues injection well blockages, corrosion and oil souring. A series of experiments were carried out examine effect 10 ppm 100 O2 an anoxic (CO2 or N2) atmosphere on communities gas production la...

Single crystal ZnO microrods are deposited on the surface of Zn plate through corrosion of Zn plate by H2O2 which is a green neutral reagent and easy to transform to H2O and O2. The structure and morphology of the obtained ZnO microrods were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and electron diffraction. A thermodynamics mechanism was...

The Sulfur-Iodide (SI) process has been investigated extensively as an alternate process to generate hydrogen through the thermo-chemical decomposition of water. The commercial viability of this process hinges on the durability and efficiency of heat exchangers/decomposers that operate at high temperatures under corrosive environments. In cooperation with the DOE and the University of Nevada, L...

Pipelines have been installed and operated around the globe to transport oil gas for decades. They are considered be an effective, economic safe means of transportation. The major concern in their operation is corrosion. Among different forms corrosion, stress corrosion cracking (SCC), which caused by stresses induced internal fluid flow or other external forces during pipeline’s operation, com...

The origins of the tribological properties and corrosion resistance of amorphous and quasicrystalline approximant alloys have been studied by comparing their properties in thin Al-Cu-Fe alloy films with compositions lying near the quasicrystalline region of the ternary compositional phase diagram. Six sputtered thin films of an Al-Cu-Fe alloy were studied using X-ray diffraction, X-ray photoemi...

The role of two oxygen sources, and water vapor, in the initiation KCl-induced high-temperature corrosion was addressed by studying high-alloyed commercial materials at 550 °C. differentiation between sources implemented with 18O-enriched 16O2. Based on results, solid-solid reaction KCl(s) protective oxide alloy surface appeared to be more responsible for than gas-solid KCl(g) oxide. Water invo...

bacteria! plaque is an essential factor of gingival and periodontal disease.the ability of chemical piaque control agent to prevent plaque formation is well documented compare with other mechanical plaque removal methods. the purpose of this study was to compare clinical effects of shore choice mouth rinse (h2 o2, 0.1%) with a placebo.following a period of 4 weeks, 20 subjects were allocated to...

This paper studies the corrosion behavior of B10 copper-nickel alloy in marine environment. Accelerated degradation test under marine environmental conditions was designed and performed based on the accelerated testing principle and the corrosion degradation mechanism. With the prolongation of marine corrosion time, the thickness of Cu₂O film increased gradually. Its corrosion product was Cu₂(O...