According to the new concept of bipolar mechanism of passivity,the bipolar organic membranes with various ion exchangers were made.The polarization curves of iron covered with bipolar organic coatings in 0.01NNaCl solution were measured by potentiodynamic

A microcrystalline Co-30Cr-5Al coating with grain sizes <0.1μm was obtained using magnetron sputtering technique.Isothermal oxidation at 1100℃ and cyclic oxidation at 1000℃ for cast Co-30Cr-5Al alloy and its sputter deposited microcrystalline coating were

The complex passive systems,such as the multiple-layer structure passive films and the passive films with adsorption of inhibitors have been studied by the potentiostatic-galvanostatic (P-G) transient technique. The way which determines whether there exs

The corrosion behavior of sevaral conducting roller materials in periodic cathodic state has been investigated by means of different immersion tests and electrochemical methods.The reasons for corrosion failure of conducting rollers have been proposed.The

On the basis of diffusion law and differential calculation,the influence of addition and distribution of the oxide particles in a two-phase high temperature coating on element diffusion in NiAl phase has been studied.Moreover,the quantitative relationship

An analysis of passivated mild steel in sulphuric acid was carried out.The potential oscillation of the mild steel under galvanostatic condition is regarded as a dissipative behaviour of an open system far away from its thermodynamic equilibrium.Through s

The effect Of the preoxidation of Fe-25Cr alloy upon its sulfidation was studied by thermogravimetry.In order to avoid the remarkable cracking of the preoxide scale,the sulfidation of the alloy was directly carried out in the same chamber for preoxidation

The Si, Y-Si, Al and Y-Al thin films have been synthesized on the surface of 304 stainless steel by IBED (Ion Beam Enhanced Deposition)technique,and their oxidation behavior have been studied at 950℃ and 1050℃. EPMA and SEM have been employed to character

The computer simulation of ceramic thermal barrier coating(TBC) on turbine engine blades during loading process has been conducted.The results show that coating's thermal stress is directly affected by loading's status i.e.,higher level and rapidly changi

The adsorption of some nitrogen and sulfur compounds such as BMAT on 18-8 stainless steel(SS) in 0.5% HCl were investigated by surface enhanced Raman scattering(SERS)spectroscopy.The SERS spectra of BMAT adsorbed on the SS were measured using a SS electro

The present test shows that tensile stress has a significant influence on the oxidation behavior of Ni_3Al. NiO is predominant in the oxide scale of Ni3Al when the oxidation proceeds with tensile stress, while Al2O3 is predominant when oxidation proceeds

Based on the physical model that an oxide or a passive film is self-repaired and metal dissolves self-catalytically,a mathematical model for metal's dissolution current is set up.By application of the catastrophe theory to this model, it is revealed that

Fe70Cr10P13C7 alloy is an alloy of easy forming amorphous, which has much higher rupture strength than normal structure steels and excellent corrosion resistance. A wide cladding layer of Fe70Cr 10P13C7 was made on the 40Cr steel substrate by laser claddi

Stress corrosion cracking(SCC)behaviors of ultra-high strength steel 300M in 3.5% NaCl solution and the influence of cathodic polarization (couppling Zinc) on crack propagation have been in vestigated using WOL plain strain precracked specimens.Fractal d

The potential of pre-oxidized metal and alloy specimens in molten salt(900℃) was measured. The potential model of the metal and alloy with oxide film in molten salt was proposed, the potential of pre-oxidized metal and alloy specimens in molten salt is re

Morphology,microstructure and chemical composition of the sputtered MCrA1X coatings were studied by means of SEM. EPMA and X-ray diffraction etc.The static oxidation test was used to study the oxidation resistance of the sputtered coatings and the substra

Ion implantation of 1×1017 Mg+/cm2 increased the oxidation rate of β-NiAl coating,which was made by diffusion aluminizing method on cast nickel base superalloy K438 in air at 1000℃. SEM examination revealed that "tumour-like" A12O3 oxides grown on the sur

The erosion-corrosion behaviour of Ni-P coatings in a slurry is investigated.The erosion-corrosion resistance of Ni-P coatings in the slurry is much higher than that of 2Cr13 and 1Cr18Ni9Ti.The SEM analysis results show that Ni-P coating surfaces display

Through 10 year test in the natural environment at the test stations in Jiangjin, Hainan and Nianzishan,a clear knowledge on the aging behavior especially on the time dependence of the appearance and the strength of some engineeing plastics has been obtai

It is indicated that corrosion of solder(Pb:Sn= 1:1) in electrolytic solution is mainly a galvanic one.In the tested solution,the electrode potential of solder is lower than that of brass.Therefore,the solder is anode when it is in contact with brass,and

The adhesive coating is composed of an adhesive and an anticorrosive filler-cast stone powder,which is coated on the surface of structural components to prevent it from corrosion and wear.This coating has great advantages in repairing corroded/worn surfac