Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Flow loop corrosion experiments with carbon steel have been carried out in CO2 environments with H2S levels below the NACE sour limit of 3 mbar H2S (“semi-sour” environments). The presence of 0.5 – 1.5 mbar H2S in loop experiments with up to 2 bar CO2 and temperatures up to 80°C resulted in slightly higher co…
Abstract The risks of AC corrosion and overprotection are increasing on cathodically protected buried steel pipelines, due to the increased cases of installing pipelines in proximity to high voltage AC power transmission lines and DC/AC powered rail transit systems. Based on field and laboratory studies as well as lit…
Abstract The inhibiting effect of several crude oils on CO2 corrosion was studied at different crude oil/water ratios. A statistical analysis showed an important difference between paraffinic and asphaltenic crude oils from the mechanistic point of view, with new findings on the variables that mostly influence the cor…
Abstract An internal corrosion assessment methodology applied to gas transmission systems was developed and is termed ‘Internal Corrosion Direct Assessment’ (ICDA). The ICDA method can be used to enhance the assessment of internal corrosion in pipelines and help ensure pipeline integrity. The method is applicable for…
Abstract The influence of yield strength on stress corrosion cracking in stainless steel is important because of surface cold work, bulk cold work, weld shrinkage strain, and irradiation hardening. To this end, stress corrosion crack growth rate measurements were performed in high temperature, ultra high purity water…
Abstract Inorganic precipitates (scales) are one of the major flow assurance concerns in offshore oil and gas production, and lead to significant reductions in productivity and costly workovers if allowed to form uncontrolled. Scale prevention by the use of chemical inhibitors, applied either by continual injection or…
Abstract The influence of acetate ion on the rate of corrosion of carbon steel (X65) in 3 % NaCl brine saturated with carbon dioxide has been investigated using voltammetry at a rotating disc electrode. It is shown that the rate of corrosion can only be understood if it is recognised that the cathodic process in the s…
Abstract A model of iron carbonate (FeCO3) film growth is proposed, which is an extension of the recent mechanistic model of CO2 corrosion by Nesic et al.1. In the present model the film growth occurs by precipitation of iron carbonate once saturation is exceeded. The kinetics of precipitation is dependent on temperat…
Abstract Several prediction models for CO2 corrosion of oil and gas pipelines have been developed. Some of the models are based on mechanistic modeling of the different processes involved in CO2 corrosion of carbon steel, while other models are mainly based on empirical correlations with laboratory or field data. The…
Two new Ru(II) diimine chromophores, each containing a single photochromic dianthryl unit, have been prepared and characterized. The photoluminescence from the Ru(II) complexes is modulated by the photochromic action of the dianthryl species, which serves as a triplet energy transfer quencher in one photochromic state…
This paper reports in situ formation of Au/Pt bimetallic nanoparticles on the surface of polystyrene microspheres. This was accomplished by dispersion copolymerization of styrene and a poly(N-isopropylacrylamide) (PNIPAAm) macromonomer in ethanol−water media in the presence of HAuCl 4 and H 2 PtCl 6 . The particle siz…
Ordered mesoporous organosilica with large (10 nm) cagelike pores was synthesized using a triblock copolymer template and characterized using 29Si and 13C NMR spectroscopy, nitrogen adsorption, thermogravimetry, TEM, and SAXS.
A series of dimethyldihydropyrene derivatives was studied to elucidate the photochemical mechanism associated with the switching between the dimethyldihydropyrene (DHP, closed) and metacyclophanediene (CPD, open) forms of the molecule. Quantum yields of ring opening and closure, fluorescence quantum yields and lifetim…
The intercalation of organically modified montmorillonite (OMMT) in the polymer blend of poly(ethylene oxide) (PEO) and poly(methyl methacrylate) (PMMA) has been demonstrated using dichloromethane as the cosolvent at room temperature. X-ray diffraction has been used to confirm the formation of nanoscale polymers-OMMT…
The trap-filling effect on the kinetics of charge recombination in dye-sensitized TiO 2 nanoparticles is discussed on the basis of the random flight model. The model assumes that electrons move between trap sites on the surface of a nanoparticle by diffusion in the conduction band. After an electron is thermally detra…
Molecular dynamics (MD) simulation has been employed to study the nonequilibrium structure formation of two types of particles in a colloidal suspension, driven by type-dependent forces. We examined the time evolution of structure formation as well as the structural properties of the resulting aggregation by studying…
The phase behaviors of polystyrene- block -poly( n -butyl methacrylate) (P(S- b -nBMA)) and polystyrene- block -polyisoprene (P(S- b -I)) copolymers were studied in the presence of methane, ethane, propane, butane, and tetradecane. Sorption of the light alkanes induces phase segregation in P(S- b -nBMA), depressing th…
Neutron structure analysis of poly(pyridobisimidazole) (PIPD) was carried out at 10, 100, 200, and 295 K. The crystal structure projected through the fiber axis was clarified. Two molecular chains pass through a rectangular unit cell with parameters a ‘ = 12.85 Å and b = 3.462 Å (at 295 K), the plane group, pgg. PIPD…
The redetermination of the structure of the title compound, Co2P2O7, agrees with the results previously reported by Krishnamachari & Calvo [Acta Cryst. (1972), B28, 2883–2885], but with improved precision.
In this work, extensive thermo-Raman investigations have been carried out on a γ(L)-Bi 2 MoO 6 sample (`(L)' indicating the low-temperature polymorph) in an effort to gain an understanding of the structural evolution and phase transformation involved during a dynamical thermal process. The room temperature Raman spect…