Electrochemical Corrosion Behavior of Carbon Steel and Hot Dip Galvanized Steel in Simulated Concrete Solution with Different pH Values

Xie, Wanchen; Li, Jiansan; Li, Yali

doi:10.5755/j01.ms.23.3.16675

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…is very subordinate. It is clear that the lowest addition of KMnO 4 used in this experimental program does not prevent the corrosion of the coating under hydrogen evolution (hydrogen evolution ceases only after about 40 h of exposure) [ 14 , 21 , 42 , 53 , 54 ]. Hydrogen gas is evolved when the E corr is below—990 mV/SCE (pH = 12.8, t = 25 °C), which is the calculated E eq (equilibrium potential) according to Equations (6) and (7) [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

The Effect of Addition Potassium Permanganate on Bond Strength of Hot-Dip Galvanized Plain Bars with Cement Paste

et al. 2023

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In this paper, the effect of gradually increasing amounts of KMnO4 (10−4, 10−3, 10−2 mol·L−1) in cement paste on the bond strength of a plain hot-dip galvanized steel bar was evaluated. The open-circuit potential of HDG samples in cement paste with various additions of MnO4− was monitored in order to follow a transfer of zinc from activity to passivity. Furthermore, the influence of the addition of these anions on the physicochemical properties of normal-strength concrete or cement paste was evaluated by means of hydration heat measurements, X-ray diffraction analysis, and compressive strength. The effective concentration of MnO4− anions prevents the corrosion of the coating with hydrogen evolution and ensures that the bond strength is not reduced by their action, which was determined to be 10−3 mol·L−1. Lower additions of MnO4− anions (10−4 mol·L−1) are ineffective in this respect. On the other hand, higher additions of MnO4− anions (10−2 mol·L−1), although they ensure the corrosion of the coating in fresh concrete without hydrogen evolution, but affect the hydration process of the cement paste that was demonstrated by slight water separation.

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Section: Resultsmentioning

confidence: 99%

The Effect of Addition Potassium Permanganate on Bond Strength of Hot-Dip Galvanized Plain Bars with Cement Paste

et al. 2023

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“…Surface treatment is an effective way to reduce the potential difference, especially for rivets, being simpler and easier. The traditional approaches for coated rivets include hot-dip plating and blackening [2][3][4][5][6]. Nonetheless, the coating cannot be effectively insulated because of process complexity, coating defects and weak adhesion, especially for a long time.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Negative Voltage on Corrosion Behavior of Ceramic Coatings Prepared by MAO Treatment on Steel

Xiang

Zhao

et al. 2022

Coatings

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In this study, the 10B21 steel was treated by micro-arc oxidation (MAO) in the electrolyte consisting of aluminate and phosphate to enhance its corrosion resistance. The effect of negative voltage on corrosion resistance of the MAO coating obtained has mainly been analyzed through their phase composition, microstructure, interfacial bonding strength, salt spray and electrochemical testing. The result indicates that with negative voltages applied to the MAO coating, Fe-Al transition layers arise between coating layer and matrix. Furthermore, different negative voltages bring forward different α-Al2O3 contents contained in the MAO coatings and when it reaches −100 V, the amount of α-Al2O3 appears as the largest. The surface porosity of the coating was also significantly decreased. In addition, the corrosion current density of the coating is only 3.64 μA·cm−2, which is two orders of magnitude lower than that of the substrate. After 72 h of salt spray corrosion, it is found that the coating substrate is less corroded when the negative voltage of 100 V is applied. Therefore, −100 V has been proven as the optimum performance for improving the corrosion resistance of 10B21 steel.

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Prediction and analysis of corrosion rate of 3C steel using interpretable machine learning methods

Liu

2023

Materials Today Communications

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Electrochemical Corrosion Behavior of Carbon Steel and Hot Dip Galvanized Steel in Simulated Concrete Solution with Different pH Values

Cited by 3 publications

References 12 publications

The Effect of Addition Potassium Permanganate on Bond Strength of Hot-Dip Galvanized Plain Bars with Cement Paste

The Effect of Addition Potassium Permanganate on Bond Strength of Hot-Dip Galvanized Plain Bars with Cement Paste

The Influence of Negative Voltage on Corrosion Behavior of Ceramic Coatings Prepared by MAO Treatment on Steel

Prediction and analysis of corrosion rate of 3C steel using interpretable machine learning methods

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