Localized corrosion phenomena,including pitting corrosoon,stress corrosion cracking,and and typically result in more than 50%of the unscheduled outages.Prediction of damage so that repairs and Inspections can be made during scheduled outages,could have an

Dispersion phenomena caused by surface passive film are obsewed through analysing Nyquist diagrams of Ti electrodes.It has been found that the dispersion effect of Ti may be simulated by a constant-phase-angle element(CPAE)With impedance z=K(jω)Based on t

The anodic behaviour of electroless Ni-P alloy in 3.5% NaCl solution has been investigated.the slops of which In dlfferent potential ranges were great diverse from each other.In the active range,inter face capacity decreased With the increace of increace

From the results of 4 year atmospheric exposure of 17 steels at 7 slies in China,the main factors affecting the atmospheric corroslvlty were anallzed、The morPhology phase constituent and electrochemical behavior of the rusts of the exposed specimens were

The oxidation behaviour of iron aluminides in dry air has been investigated,including isothermal oxidation at 600℃,75O℃,950℃ and cyclic oxidation at 750℃.The structure of the scale was identified by means of X-ray diffraction,while the morphology of the s

The anodic processes of irondectrode in sulhric acid sohtions are studied by using photomicrography and SEM techniques.In prepassive region a silvery film is found on the iron electrode surface.XPS analyses indicated that this film Was probably composed o

The possibility and necessity for the introduction of pattern recognition into environmental corrosion science were demonstrated.The outline of the pattern recognition was briefly introduced,and mainly,the mathematical principle and application characteri

An investigation was carried out on the difference between an A.C.modulated passive film on 321 stainless steel with a large A.C.amplitute and those with a small amplitude by means of electrochemical,ellipsometrical and AES techniques.Results show that th

The inhibiting behaviors of thiourea on FeNiSiB amomhous alloys with differet crystallinities have been studied by electrochemlcal measurements.The adsomtion means and inhibiting ability of the thiourea are not the same for the amorphous alloys with diffe

The threshold values of SCC in chloride and nitrate aqueous solutions and HIC under dynamical hydrogen charging for steel 50Mnl8r4WN were determined using pre-cracked cantilever bend specimens and compact tension specimens.Observations of crack propagatio

:The conclusion can be made from the results getting from the electrochemlcal measurement,chemical and surface analysis that there were no elements accumulated on the FeNiSiB amorphous alloy when it dissolved actively. in another words,this alloy dissolve

Investigation was carried out of corrosion fatigue behaviour of omffshore structural steels,home made Z-direction steel and import steel A537 with similar strength grade In 3.5%NaCl aqueous solu may fairly match that ofA537.The effect offrequency and solu

Low carbon steel 20G samples cut from a hot-rolling plate were exposed to hydrogen at 723K and 773K,18MPa for 240,480 and 720 h respectively.Hydrogen attack occurred in the samples and the methane bubbles on the surfaces of samples could be obsefVed clear

According to the principles ofcorrosion electrochemstry,a highly sensitive atmosphere corro sion monitor was designed.It can automatlcally select suitable scale to continuously measure the yalvanic corrosion current by four probes simultaneously,store dat

In order to provide engineering data for the design and operation of pressure vessels made of A372 steel,the tests have been conducted in high pressure hydrogen at ambient temperature for determining the hydrogen embrittlement critical critical stress int

Anode Fe2O3/Ti was studied by electrochemical measurement,scanning electronic micro scope and X-ray diffraction.The results show that the electrode in 3.5% NaCl has the advantages of small polarization,good resistance to high current density density and l

The failure of the strike piston of hydraulic rock drill was investigated by optical microscopy,SEM,stress corrosion and corrosion fatigue tests.It has been found that,the faiure ofthe piston is due to the According to the experiment results,measures to p

The corrosion behaviours of iron in YD-300 heat-transfer-oil with different property in analysis of the damaged heater pipe was made and the protection measures were proposed.