The effects of chromate on the transient repassivation potential of aluminium in chloride solution

Cinderey, R.J.; Burstein, G.T.

doi:10.1016/0010-938x(92)90076-f

Cited by 32 publications

(18 citation statements)

References 7 publications

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“…Formation of monoatomic or polyatomic oxide films on the electrode surface is generally accepted as the mechanism of chromate inhibition [15]. The effect of produced Cr 2 O 3 has also been reported for acceleration of repassivating aluminium surface [18]. The effect of chromate ions on increasing the breakdown potential of 316 SS [16] and Aluminium AA7075-T651 [19] have been reported in NaCl solution.…”

Section: Introductionmentioning

confidence: 97%

The effect of dichromate ion on the pitting corrosion of AISI 316 stainless steel Part II: Pit initiation and transition to stability

et al. 2015

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Section: Introductionmentioning

confidence: 97%

The effect of dichromate ion on the pitting corrosion of AISI 316 stainless steel Part II: Pit initiation and transition to stability

et al. 2015

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“…[1][2][3][4][5][6] Other related techniques have also been used to create freshly bared areas on passive samples including breaking, 7,8 guillotining, [9][10][11][12][13][14] impingement with particles, 15 and laser irradiation. [16][17][18] These studies have provided considerable insight into the nature of passivity and the kinetics of repassivation.…”

mentioning

confidence: 99%

Influence of Dichromate Ions on Corrosion of Pure Aluminum and AA2024‐T3 in NaCl Solution Studied by AFM Scratching

Schmutz

Frankel

1999

J. Electrochem. Soc.

106

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The localized corrosion of pure aluminum, AA2024-T3 alloy, and in particular the behavior of the intermetallic particles in AA2024-T3 were studied using a technique of scratching the surface with atomic force microscopy (AFM) tips. In situ AFM scratching provides information regarding the protectiveness of the surface film. Scratching of aluminum by rastering the surface with the AFM tip in contact mode in 0.5M NaCl resulted in accelerated uniform dissolution in the rastered area. Slow pumping of the solution through the AFM cell during scratching, however, resulted in the development of sustained localized corrosion. Scratching in a stagnant 0.5 M NaCl solution containing 10 -4 M Na2Cr 2 O 7 also resulted in the development of large pits. For higher dichromate concentrations (0.005 and 0.05 M), neither accelerated dissolution nor pitting was observed, most probably because of the formation of harder chromium containing surface oxide. AFM scratching of AA2024-T3 in 0.01 M NaCl resulted in the immediate dissolution of the Al-Cu-Mg particles because of a destabilization of the surface film during light scratching. The addition of very dilute concentrations of dichromate (10 -4 M) to 0.5 M NaCl completely suppressed the corrosion of the Al-Cu-Mg particles during AFM scratching, but breakdown in the matrix occurred in a similar fashion as for pure aluminum. The addition of 0.005 M dichromate to 0.5 M NaCl again suppressed localized breakdown for low applied force during scratching, but pits formed at the Al-Cu-Mg particles at high forces. Higher dichromate concentration (0.05 M) did not completely suppress the localized breakdown at Al-CuMg particles, but the amount and lateral spreading of the dissolution was much smaller.

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“…For example, it has been referred to surface or bulk relaxation of species in the oxide layer [43]. Cinderey and Burstein's measurements [44][45][46][47] confirmed that the inductive loop was closely related to the existence of a passive film on aluminum. Bessone et al [48] observed an inductive loop for the pitted active state on aluminum, and attributed the phenomena to surface area modulation or salt film property modulation.…”

Section: Eis Studiesmentioning

confidence: 79%

Electrochemical corrosion behavior of Al7075 rotating disc electrode in neutral solution containing l-glutamine as a green inhibitor

Ashassi-Sorkhabi

Asghari

2009

J Appl Electrochem

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This is a study of the electrochemical corrosion behavior of aluminum alloy Al7075 and its corrosion inhibition using L-glutamine in 3.5% NaCl solution under different hydrodynamic conditions. The hydrodynamic conditions were simulated by using a rotating disc electrode. The results showed that an increase in rotation speed leads to a higher corrosion current density, while the charge transfer resistance decreases and corrosion potential shifts toward more positive values. The inhibition efficiency depends on rotation speed. That is, the efficiency was low in stagnant solution, but enhanced significantly under hydrodynamic conditions. The phenomenon was attributed to the increased mass transport of inhibitor's molecules to the electrode surface that is advantageous for improvement of inhibition efficiency. However, higher rotation speeds (X C 1,500 rpm) cause a slight reduction of efficiency due to higher shear stresses.

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The effects of chromate on the transient repassivation potential of aluminium in chloride solution

Cited by 32 publications

References 7 publications

The effect of dichromate ion on the pitting corrosion of AISI 316 stainless steel Part II: Pit initiation and transition to stability

The effect of dichromate ion on the pitting corrosion of AISI 316 stainless steel Part II: Pit initiation and transition to stability

Influence of Dichromate Ions on Corrosion of Pure Aluminum and AA2024‐T3 in NaCl Solution Studied by AFM Scratching

Electrochemical corrosion behavior of Al7075 rotating disc electrode in neutral solution containing l-glutamine as a green inhibitor

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