Passivity breakdown, pit initiation and propagation of pits in metallic materials – Review

Soltis, Jozef

doi:10.1016/j.corsci.2014.10.006

Cited by 565 publications

(262 citation statements)

References 249 publications

Supporting

Mentioning

244

Contrasting

Unclassified

Order By: Relevance

“…No observable pits were formed on the surface of the material prior to PDP measurements in just acidic conditions due to either the uniform destabilization of the passive film and hence no localized corrosion, or the lack of chloride ions in solution. 6 The effect of lowering the stability of the passive film and the presence of chloride ions on the material's localized corrosion initiation sites was investigated in a 0.5 M KCl and 0.5 M HCl etching solution. The active to passive behavior classically reported for PDP measurements of SS was observed in the etching solution as seen in Fig.…”

Section: Microstructure Characterization Of Ss 444mentioning

confidence: 99%

“…[3][4][5] Despite the successful reduction of IGC in alloyed ferritic SS, its mechanical strength can still be greatly reduced by pitting corrosion, usually associated with some discontinuity over the metal surface, such as a grain boundary, a defect/scratch, or an inclusion within the metal's microstructure. 6 Among the typical corrosion initiators, manganese sulfide (MnS) inclusions in austenitic SSs have been identified as pitting corrosion initiation sites and have been extensively investigated using macro-scale [7][8][9][10] and micro-scale 11,12 techniques. More recently, Ti and Nb rich carbide and nitride inclusions have been found in SS resulting from the preferential precipitation of stabilizing agents, as previously described.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The role of titanium in the initiation of localized corrosion of stainless steel 444

et al. 2018

View full text Add to dashboard Cite

Titanium has been added to ferritic stainless steels to combat the detrimental effects of intergranular corrosion. While this has proven to be a successful strategy, we have found that the resulting Ti-rich inclusions present on the surface play a significant role in the initiation of other forms of localized corrosion. Herein, we report the effect of these inclusions on the localized corrosion of a stainless steel using macro and micro electrochemical techniques. Through the use of scanning electrochemical microscopy, we observe the microgalvanic couple formed between the conductive inclusions and passivated metal matrix. The difference in local reactivity across the material's surface was quantified using a 3D finite element model specifically built to respect the geometry of the corrosion-initiating features. Combined with electron microscopy and micro elemental analysis, localization of other alloying elements has been reported to provide new insight on their significance in localized corrosion resistance.

show abstract

Section: Microstructure Characterization Of Ss 444mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The role of titanium in the initiation of localized corrosion of stainless steel 444

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The results of adsorption investigations show that a phase oxide film, which is capable of adsorbing chlorine ions, is formed on the metal surface [14]. An increase in the adsorption of Cl -ions is observed at those pH values where the protective action of ОН -ions, which is determined by the formation of Fe(OH) 3 with a developed surface, is realized.…”

Section: Discussion Of the Study Results Of Corrosion Of St 3 Steel mentioning

confidence: 82%

Study into the influence of concentration of ions of chlorine and temperature of circulating water on the corrosion stability of carbon steel and cast iron

Pancheva

Reznichenko

Miroshnichenko

et al. 2017

EEJET

View full text Add to dashboard Cite

“…Previous research on pitting corrosion has shown that it is difficult to experimentally conclude on its mechanism due to its random nature and breakdown of the steel's passive film is due to the selective dissolution of the iron substrate metal [6][7][8][9][10][11][12]. The electrochemical process of pitting corrosion results in the formation of microscopic holes of various sizes on metal surfaces which tends to rapidly increase in dimension especially in the presence of chloride ions within the corrosive medium.…”

Section: Introductionmentioning

confidence: 99%

Pitting Corrosion Resistance and Inhibition of Lean Austenitic Stainless Steel Alloys

Loto¹

2017

Austenitic Stainless Steels - New Aspects

View full text Add to dashboard Cite

The pitting corrosion behavior of 301, 304 and 316 austenitic stainless steels in 2M H 2 SO 4 at 0-1.5% NaCl concentrations was investigated through potentiodynamic polarization and optical microscopy analysis. Electrochemical analysis of the pitting corrosion inhibition and surface protection properties of rosemary oil and aniline on the stainless was also performed. The corrosion rate, pitting potential, passivation potential, metastable pitting potential and surface morphology of both steels where significantly altered by changes in chloride concentration, differences in alloy composition and metallurgical properties of the steels. 316 steel had the lowest corrosion rate and highest pitting corrosion resistance followed by 301 steel. The surface morphology of 316 steel was slightly altered at 1.5% NaCl concentration while 301 steel appears to etch with grain boundaries appearing at higher chloride concentration. 304 steel showed no resistance to pitting after 0% NaCl coupled with relatively significant increase in corrosion rate values. Its surface morphology showed the presence of corrosion pits with respect to chloride and inhibitor concentration. Rosemary oil and aniline significantly reduced the corrosion rates values of the stainless steels and with consequent increase in their pitting corrosion resistance; however the compounds had no positive influence on the pitting corrosion behavior of 304 steel.

show abstract

Passivity breakdown, pit initiation and propagation of pits in metallic materials – Review

Cited by 565 publications

References 249 publications

The role of titanium in the initiation of localized corrosion of stainless steel 444

The role of titanium in the initiation of localized corrosion of stainless steel 444

Study into the influence of concentration of ions of chlorine and temperature of circulating water on the corrosion stability of carbon steel and cast iron

Pitting Corrosion Resistance and Inhibition of Lean Austenitic Stainless Steel Alloys

Contact Info

Product

Resources

About