The role of alloyed molybdenum in the inhibition of pitting corrosion in stainless steels

Ilevbare, G. O.; Burstein, G.T.

doi:10.1016/s0010-938x(00)00086-x

Cited by 266 publications

(128 citation statements)

References 32 publications

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“…Metastable pitting activity can be clearly seen for the S30403 as revealed by a series of transients from −0.200 V to the breakdown potential at +0.030 V. Metastable pitting on stainless steels can be observed at potentials below the pitting potential, or above the pitting potential before the start of stable pitting [23]. In addition, the corrosion performance of S30403 when compared with S31603 and S32760 stainless steels is usually often related to the role of alloying molybdenum; it has been reported that the molybdenum changes the anodic dissolution kinetics of the active pit surface [24,25]. Table 6 details the values of corrosion potential Fig.…”

Section: Alumina Ball Without Sic Abrasivementioning

confidence: 99%

Synergistic effects of micro-abrasion–corrosion of UNS S30403, S31603 and S32760 stainless steels

Bello

Wood

Wharton

2007

Wear

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In this study, the synergistic effects of abrasion and corrosion on UNS S30403, S31603 and S32760 stainless steels have been investigated using a micro-abrasion test rig. The stainless steel samples have been studied under both pure abrasion (PA) and abrasion-corrosion (AC) conditions simulated by using silicon carbide based slurries in either distilled water or 3.5% sodium chloride solutions. Tests have been conducted at various abrasive concentrations (0.006-0.238 g/cm 3 ) and at 38 and 180 m sliding distance to enable the interactions between abrasion and corrosion to be better understood. Wear mode identification and regime mapping was used to establish the dominant wear mechanism at the different slurry concentrations. The synergistic effect has been quantified and related to the material composition and the grooving or rolling abrasive wear mechanisms present. The synergistic levels were typically positive and have been discussed in terms of their dependence on the integrity of the passive films and the repassivation kinetics. The three-body abrasion-corrosion rates for all steels were found to be 14 times higher than two-body abrasion-corrosion rates. S30403 shows weak repassivation performance with electrochemical activity being proportional to mechanical activity. S31603 showed a constant electrochemical activity over a variety of mechanical conditions, indicating a stronger repassivation performance than S30403. S32760 has the best repassivation performance with negative synergistic characteristics until abrasion rate are such that depassivation occurs and the electrochemical activity is then comparable to the other steels.

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Section: Alumina Ball Without Sic Abrasivementioning

confidence: 99%

Synergistic effects of micro-abrasion–corrosion of UNS S30403, S31603 and S32760 stainless steels

Bello

Wood

Wharton

2007

Wear

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“…According to Burstein [28,29], this is directly associated with the observation that the number of surface sites available for development of a metastable pit decreased with decreasing chloride for all potentials. A number of researchers studied the effect of alloying elements on the formation of metastable pitting and observed that stainless steel alloys with varying concentration of chromium and molybdenum experience a decrease in the number of metastable events with time due to improve corrosion resistance of the passive film resulting in decrease in available initiation sites [30][31][32][33].…”

Section: Metastable Pittingmentioning

confidence: 99%

Pitting Corrosion Resistance and Inhibition of Lean Austenitic Stainless Steel Alloys

Loto¹

2017

Austenitic Stainless Steels - New Aspects

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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.

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“…Nano-materials provide an efficient corrosion resistance in self-assembled nano-phase particle, due to its high surface area and adhesion to the substrate (Voevodin et al 2003;Bjerklie 2005). Three layer TiO 2 -Al 2 O 3 nanocomposite coatings (Vaghari et al 2011) and TiN-based coatings (Ilevbare and Burstein 2001) exhibited excellent corrosion resistance on SS316L. Not much work has been done to introduce a mixture consisting of multifunctional Electronic supplementary material The online version of this article (https ://doi.org/10.1007/s1320 4-018-0650-y) contains supplementary material, which is available to authorized users.…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance of BIS 2062-grade steel coated with nano-metal-oxide mixtures of iron, cerium, and titanium in the marine environment

Ashraf

Anuradha

2018

Appl Nanosci

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BIS 2062-grade carbon steel is extensively used for fishing boat construction. The steel is highly susceptible to corrosion on the hull and welding joints under marine environment. Here, we demonstrate the application of a novel multifunctional nano-metal-oxide mixture comprised of iron, titanium, and cerium as a marine coating to prevent corrosion. The electrochemical performance of nano-metal-oxide mixture coatings, applied over boat-building steel, was evaluated at 3.5% NaCl medium. The nano-mixture surface coatings showed an efficient corrosion resistance with increased polarization resistance of 6043 Ω cm 2 and low corrosion current density of 3.53 × 10 −6 A cm −2 . The electrochemical impedance spectral data exhibited improvement in the polarization resistance of outermost surface and internal layers. The coating responded faster recovery to normal state when subjected to an induced stress over the coating. The nano-material in the coating behaves as a semiconductor; this enhanced electronic activity over the surface of the steel.

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The role of alloyed molybdenum in the inhibition of pitting corrosion in stainless steels

Cited by 266 publications

References 32 publications

Synergistic effects of micro-abrasion–corrosion of UNS S30403, S31603 and S32760 stainless steels

Synergistic effects of micro-abrasion–corrosion of UNS S30403, S31603 and S32760 stainless steels

Pitting Corrosion Resistance and Inhibition of Lean Austenitic Stainless Steel Alloys

Corrosion resistance of BIS 2062-grade steel coated with nano-metal-oxide mixtures of iron, cerium, and titanium in the marine environment

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