Corrosion of Zinc in Concrete

Schwick, W.; Diehl, R. P.; Carpentier, C.-D.

doi:10.1038/physci229184a0

Cited by 3 publications

(3 citation statements)

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“…In this time interval, the thickness of the layer of corrosion products increases swiftly. Time dependence of intensification of growth corresponds to previously published results [ 14 , 41 , 81 , 82 , 83 , 84 ]. Simultaneously, the R ref (ct) increases, suggesting reduction of corrosion rate due to formation of corrosion products layer with barrier effect.…”

Section: Resultssupporting

confidence: 87%

“…After a while (~50 h), E corr is increased (~−400/ACLE) and simultaneously the R p (increase to 35–45 Ω·m 2 ). A layer of corrosion products is formed, primarily composed of Ca[Zn(OH) 3 ] 2 ·2H 2 O which strongly inhibits the corrosion damage to the HDG steel in this environment [ 9 , 21 , 73 , 74 , 75 , 76 , 81 , 82 , 83 , 84 ]. It is a matter of discussion if passivation of HDG samples is also affected by formation of ZnO/Zn(OH) 2 by filling the pores between Ca[Zn(OH) 3 ] 2 ·2H 2 O) [ 9 , 21 ].…”

Section: Resultsmentioning

confidence: 99%

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The Influence of Graded Amount of Potassium Permanganate on Corrosion of Hot-Dip Galvanized Steel in Simulated Concrete Pore Solutions

et al. 2022

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This paper evaluates the amount of KMnO4 in simulated concrete pore solution (pH 12.8) on the corrosion behaviour of hot-dip galvanized steel (HDG). In the range of used MnO4− (10−4, 10−3, 10−2 mol·L−1), corrosion behaviour is examined with regard to hydrogen evolution and composition (protective barrier properties) of forming corrosion products. The corrosion behaviour of HDG samples is evaluated using Rp/Ecorr and EIS. The composition of corrosion products is evaluated using SEM, XRD, XPS and AAS. The effective MnO4− ion concentration to prevent the corrosion of coating with hydrogen evolution is 10−3 mol·L−1; lower concentrations only prolong the time to passivation (corrosion with hydrogen evolution). The highest used MnO4− concentration ensures corrosion behaviour without hydrogen evolution but also leads to the formation of less-protective amorphous corrosion products rich in MnII/MnIII phases.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

The Influence of Graded Amount of Potassium Permanganate on Corrosion of Hot-Dip Galvanized Steel in Simulated Concrete Pore Solutions

et al. 2022

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“…It has been stated by several authors that up to pH 13.3 of the model pore solution, the surface becomes passive by the formation of the zincate [11][12][13][14]. However, there are also works with data contradicting this conclusion, explaining the transition to passive state is caused by ZnO and ε-Zn(OH) 2 [15,16,17].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Corrosion of Zinc Powder on Mechanical Properties of Concrete

Pokorný¹

2016

Ceramics - Silikaty

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This paper studies the effect of zinc corrosion in fresh concrete on the process of its hydration and evolution of common mechanical properties. Process of hydration was monitored by temperature measurement of hydrating concrete contaminated with zinc powder (0.5; 5.0 wt. %) in closed system. Mechanical properties were monitored in similarly contaminated concrete samples (compressive cubic strength, compression modulus of elasticity). The results suggest that zinc corrosion products retard the concrete hydration and evolution of mechanical properties, however, forming hydrogen also has some negative effect.

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