【摘 要】
:
The corrosion behaviors of X65 steel in the artificial seawater at different hydrostatic pressures are investigated by potentiodynamic polarization measurements,electrochemical impedance spectroscopy measurements and weight loss measurements.The corroded
【机 构】
:
Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engine
论文部分内容阅读
The corrosion behaviors of X65 steel in the artificial seawater at different hydrostatic pressures are investigated by potentiodynamic polarization measurements,electrochemical impedance spectroscopy measurements and weight loss measurements.The corroded morphologies and the corrosion products are also investigated by scanning electron microscopy,X-ray diffraction analysis and Raman analysis.The results show that the corrosion current increases as the hydrostatic pressure increases.The charge transfer resistance decreases as the hydrostatic pressure increases.The corrosion products are mainly composed of γ-FeOOH and Fe3O4 at the atmospheric pressure,while the main components are γ-FeOOH,Fe3O4,and γ-Fe2O3 at the high pressure.The hydrostatic pressure accelerates the corrosion of X65 steel due to its effect on the chemical and physical properties of corrosion products,including the promoted reduction of γ-FeOOH and the wider and deeper cracks on the corrosion products layer.
其他文献
The effects of Ni content and ball milling time on the hydrogen storage thermodynamics and kinetics performances of asmilled La5Mg95-xNix(x =5,10,15) ternary alloys have been investigated.The evolution of microstructure and phase of experimental alloys in
A large amount of directional and willow-like β\'phase was precipitated in Mg-10Gd-3Y-0.4Zr (GW103K) alloy after solution treatment and subsequently aged treatment (T6).In order to explore the effect of the precipitates on the corrosion behavior of the
Nanocrystalline and amorphous NdMg12-type NdMg11Ni +x wt% Ni (x=100,200) alloys were successfully prepared through ball milling (BM).The microstructures and electrochemical properties were systematically studied to get a more comprehensive understanding o
The effect of phosphorus on the precipitations of γ“,γ\'and δ phases and associated tensile properties in IN718C alloy are investigated in this study.It is revealed that P atoms are dissolved in the grain interior to a relatively high degree and hence i
In order to study the influence of the physical state of solder on the interfacial reaction of dip-soldered Sn-3.0Ag-0.5Cu/Cu system,two kinds of experiments were designed,including:(1) solid-state aging between the solder and Cu substrate;(2) liquid-stat
Direct laser metal deposition is a kind of advanced rapid manufacturing technology,which can produce near net shape parts by depositing metal powders layer by layer.This study demonstrates fabrication,the anisotropy of mechanical properties and hardness o
The influences of pin offset on the formation,microstructure and mechanical properties of friction stir welded joint of Ti6A14V and AZ31B Mg dissimilar alloys were investigated.The results show that sound joints are obtained at different offsets.With the
The microstructures and corrosion behavior of AlSi5Cu 1Mg alloy modified with different contents of La were investigated.Optical microscopy observations showed that the microstructures of AlSi5Cu 1Mg-xLa (x =0,0.3,0.6,and 0.9 wt%) alloy transformed from c
With the aim of improving corrosion resistance of rod cladding for in-service and accident conditions,six new zirconium alloys (named N1-N6) have been designed.The contents of Sn and Nb were optimized for better behavior at high-temperature pressurized wa
In the present study,creep activation energy for rupture was obtained as 221-348 kJ/mol for 22Cr15Ni3.5CuNbN due to the precipitation-hardening mechanism.The extrapolation strength of creep rupture time of 105 h at 923 K for 22Cr15Ni3.5CuNbN is more valid