The pitting of mild steel in phosphate-borate solutions in the presence of sodium sulphate

Acosta, C.A.; Salvarezza, Roberto Carlos; Videla, H.A.; Arvía, Alejandro Jorge

doi:10.1016/0010-938x(85)90108-8

Cited by 23 publications

(13 citation statements)

References 21 publications

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“…High concentration sulfate ions could inhibit the passivity film formation of A3 steel in alkaline solutions (12). In neutral or alkaline solution, sulfate ions could accelerate the pitting of low carbon steel because of its stronger corrosive than chloride ions (11).…”

Section: Resultsmentioning

confidence: 99%

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The Effect of Surface State on Electrochemical Behaviors of Iron in Slightly Alkaline Solutions

Chen¹,

Lu²,

Xiao³

et al. 2014

ECS Trans.

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The effect of prior cathodic polarization (PCP) treatment on the nature of the surface state and electrochemical behavior of iron in dilute bicarbonate solutions were studied. PCP treatment could cause a transition of open circuit state of iron from passive state to active dissolution state. The electrochemical impedance spectroscopy for iron in test solutions at open circuit state was significantly lower after the PCP treatment. Without PCP treatment, iron was in passive state and no obvious activepassive transition could be observed on anodic polarization curves in bicarbonate solutions with sulfate ion concentration less than 0.5 mol/L. After the PCP treatment, iron was in active dissolution state, and all anodic polarization curves exhibited active-passive transition characteristics.

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Section: Resultsmentioning

confidence: 99%

“…The effects of sulfate on corrosion and electrochemical behavior of iron and steels have been reported (11)(12)(13). Vatankhah et al (13) studied the electrochemical behavior of iron in sodium sulfate and sodium bicarbonate solutions at pH 8.…”

Section: Introductionmentioning

confidence: 98%

The Effect of Surface State on Electrochemical Behaviors of Iron in Slightly Alkaline Solutions

Chen¹,

Lu²,

Xiao³

et al. 2014

ECS Trans.

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“…The increase of anodic current matches the occurrence of stable pits during the anodic scan at high potentials. These pits can still grow during the cathodic polarization in regions of metastable pit growth [35,37].…”

Section: Cyclic Voltammetry In Phosphate Buffer With Naclmentioning

confidence: 99%

Electrolyte Composition for Distinguishing Corrosion Mechanisms in Steel Alloy Screening

Bösing

Thöming

Baune

2017

International Journal of Corrosion

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The formation and breakdown of passive layers due to pitting corrosion are a major cause of failure of metal structures. The investigation of passivation and pitting corrosion requires two different electrochemical measurements and is therefore a time consuming process. To reduce time in material characterization and to study the interactions of both mechanisms, here, a combined experiment addressing both phenomena is introduced. In the presented electrolyte the different corrosion mechanisms are distinguished and investigated by cyclic voltammograms and polarization scans. The measurements show a passive area, metastable pit growth, and pitting corrosion as well as repassivation. The pitting corrosion is separated from additional dissolution processes and the standard deviation of the corrosion potential is smaller than in other electrolytes. Both passivation and pitting corrosion can be observed in one measurement without additional corrosion attacks. The deviation between different measurements of the same steel is small; this is helpful for the screening of similar materials.

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“…Region II extends to lower potentials in the negative going potential scan displaying the typical hysteresis loop of pitting corrosion with a crossing point at the repassivation potential. In principle, the voltammetric behaviour for copper in these solutions is similar to that found for the breakdown of passive layers and initiation of pitting corrosion for a number of metals in aggressive environments [34][35][36][37].…”

Section: Voltammetry and Breakdown Potentialsmentioning

confidence: 99%

Pitting corrosion of polycrystalline annealed copper in alkaline sodium perchlorate solutions containing benzotriazole

et al. 1992

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The pitting corrosion of copper in alkaline solutions in the presence of benzotriazole (BTA) was investigated. The presence of BTA shifts the breakdown (Eb) and the repassivating (Ep) potentials positively with respect to the blanks. However, the shift of Ep becomes smaller than that of Eb, particularly at pH 9 and 11. Pitting corrosion involves the formation of crystallographic pits. The kinetics of the process fits a nucleation and growth mechanism involving instantaneous nucleation and 3D growth under charge transfer control. The spatial distribution of pits indicates that there is no marked influence of a pit on the nucleation and growth of other pits.

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The pitting of mild steel in phosphate-borate solutions in the presence of sodium sulphate

Cited by 23 publications

References 21 publications

The Effect of Surface State on Electrochemical Behaviors of Iron in Slightly Alkaline Solutions

The Effect of Surface State on Electrochemical Behaviors of Iron in Slightly Alkaline Solutions

Electrolyte Composition for Distinguishing Corrosion Mechanisms in Steel Alloy Screening

Pitting corrosion of polycrystalline annealed copper in alkaline sodium perchlorate solutions containing benzotriazole

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