...- and Fe17Cr5.5Ni-based alloys were closely associated with the repassivation capacity and the resistance to pitting corrosion. Stainless steel Stress corrosion cracking Slow strain rate test Pitting corrosion Repassivation INTRODUCTION In recent years, rapid increase in demand for oil and gas has promoted...

... the effect that proteins have on these features. The kinetics were analyzed using potentiostatic polarization, applying a second order exponential decay to the current transients obtained, which consists of two phases: coverage and thickening. Repassivation occurred quickest in a phosphate environment...

.... The strain energy stored in cold-rolled specimens can increase the driving force for the iron oxidation reaction, therefore influencing the repassivation and corrosion behavior of A569. As a result, cold-rolled carbon steel specimens, in their active state, undergo a higher general corrosion rate than...

.... cumulative frequency curve, which may correspond to the size of the pit at which reduced sulfur species start to facilitate pitting. metastable pitting thiosulfate pit initiation repassivation Introduction Conclusions The effect of addition of up to 0.018M thiosulfate ions on the pitting resistance...

... waste package material in a geologic repository setting. To evaluate susceptibility to sulfur-enhanced corrosion, the repassivation behavior of UNS N06022 was investigated in sulfur-containing chloride solutions using a scratch technique. Once the passive film was disrupted by scratching, anodic current...

... for determining accurate Repassivation potentials (E_rp) in deaerated chloride media. It was found that the Nano-phase Al ribbon alloys had nobler E_rp when compared to their bulk forms except for Al 7055-T7. Electrochemical cyclic polarization scans were performed on 3 RSA alloys systems (Al...

... with and without dissolved hydrogen (DH) for basic study of PWSCC mechanism. The followings are clarified as an electrochemical behavior of bare metal surface appeared just after oxide film failure under simulated primary water. Very rapid repassivation of alloy690(UNS N06690) and relatively slow repassivation...

...(2) i = Q / t f Abstract The objective of this study is to investigate the effect of strain hardening on the passive film repassivation kinetics. This helps understand the film breakdown and repair processes occurring at the crack tip of a ductile material. Straining electrode tests were...

... (0.013 atm). TABLE 1 MATERIAL COMPOSITION Element Alloy 600 Heat NX8147 (Permeation) Alloy 600 Heat NX8517G18 (Repassivation) Nickel Heat N56POAG (Repassivation) C 0.021 0.06 0.004 Mn 0.20 0.21 0.24 Fe 8.70 8.63 0.04 S 0.001 <0.001 0.001 Si 0.17 0.2 0.02 Cu...

.... The repassivation potential was found to be a strong function of the severity of corrosion attack that has occurred on the steel surface before repassivation, rather than a function of the chloride content of the bulk solution. The pitting tendency in chloride-containing SPS and Ca(OH)₂ solutions...

... represent pits with “large” openings to the bulk solution. EXPERIMENTAL Abstract The effects of the most important variables on continued growth and repassivation of open macroscopic corrosion pits in stainless steel sheets were investigated using two different artificial pit configurations. The pit...

..., the beneficial effects of cathodic current are discussed. The importance of realkalization of concrete in contact with the reinforcement and repassivation of steel in order to achieve stable protection conditions is shown. Protection conditions are discussed to provide design parameter and protection criteria...

... < S 31703 Alloy R31233 appears to be the best candidate material for the rolls in acidic sulfate baths due to its low corrosion rate, its high repassivation kinetics and its excellent resistance to wear. Alloys N06200 and N06022 are the second best group of materials for the application...

... in short-term tests with polished specimens overestimated the long-term initiation potentials by as much as 300 mV. On the other hand, the repassivation potential obtained from short-term tests was found to be a conservative parameter in predicting the initiation of localized corrosion after prolonged...

... water solution due to penetration of alkaline electrolyte from the surface as well as repassivating of the reinforcement due to electrochemical reactions at the steel surface. In order to clarify the different mechanisms taking place during electrochemical realkalization laboratory tests have been...

... and selection of highly alloyed stainless steels for sea water application - the relevancy of the electrochemical test methods used, the quality control system and the importance of repassivation. Crevice corrosion QUALITY CONTROL Statistics While determination of critical pitting temperature using a long...

... stainless steel alloy 825 crevice pH chloride potential repassivation initiation chromium depletion surface roughness INTRODUCTION Long-term prediction of the performance of any metallic material exposed to a corrosive environment requires a knowledge of the nominal environment as well...

... 0.014 16.4 0.27 Bal. 1.58 2.1 10.0 - Abstract The repassivation potential is investigated for use as a parameter in the long-term prediction of the pitting resistance of Fe-Ni-Cr-Mo alloys. It is shown that repassivation potential is independent of the extent of prior pit growth for alloy 825...

... of formation of the bare surface, to obtain the current from an incremental area of the bare surface. ^{12 , 13 , 19} This paper describes a method to deconvolute the measured current produced by a scratch technique. The method allows the repassivation kinetics to be determined and is capable of being...

... and potential for pit repassivation E_pp during cycling ( 3 ). A good correlation exists between the long-term behavior of several alloys in noth seawater and laboratory polarization tests. However, Rowlands ( 4 ) who used the same potentiokinetic technique for a series of alloys observed a large...