Transient Analysis of Electrochemical Noise for 316 and Duplex 2205 Stainless Steels Under Pitting Corrosion

Estupiñán-López, Francisco; Almeraya‐Calderón, F.; Bautista-Margulis, R.G.; Zamora, Miguel Ángel Baltazar; Martínez‐Villafañe, A.; Uruchurtu, J.; Gaona‐Tiburcio, C.

doi:10.1016/s1452-3981(23)18146-6

Cited by 26 publications

(1 citation statement)

References 22 publications

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“…The type of corrosion occurring on the metal can be determined by a statistical parameter of the electrochemical noise, called the pitting index or localization, which is calculated by the ratio of the standard deviation in current (σI) and the root mean square current (I rms ). Table 6 shows the range of localization index values for the type of corrosion in metal [56]. This electrochemical method is based on the measurement of the polarization resistance (LPR) of the metallic medium at the interface of a constant corrosion potential, where the corrosion rate expressed in terms of the dissolution current density of the metal is inversely proportional to the polarization resistance [57].…”

Section: Specimen Preparationmentioning

confidence: 99%

Influence of Recycled High-Density Polyethylene Fibers on the Mechanical and Electrochemical Properties of Reinforced Concrete

Flores Nicolás,

Menchaca Campos,

Flores Nicolás

et al. 2024

Fibers

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The quantity of different plastics generated after consumption is an impact factor affecting the environment, and the lack of recycling generates solid waste. The purpose of this work is to incorporate high-density recycled polyethylene fibers (HDPE) for possible use as concrete reinforcement. Physical and mechanical properties from recycled fibers were analyzed, such as density, absorption, and stress resistance, as well as workability, air content, porosity, concrete compression, and flexural strength properties. Samples were prepared with a low fiber content of 0.2% and 0.4%, as a substitution for sand weight, and lengths of 10 and 30 mm. To study corrosion phenomena, the specimens were exposed to a saline environment containing 3% sodium chloride for 365 days, and the electrochemical techniques including half-cell potential (HCP), electrochemical noise (EN), linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) were applied. The results showed a 4.8% increase in compressive strength with a low fiber percentage and short geometries, while flexural strength increased marginally by 2.3% with small quantities of HDPE fibers. All these factors contribute to greater material durability, less permeability, and crack control. A positive effect of fibers with short dimensions on the corrosion processes of a steel bar was observed, with the fibers acting as a physical barrier against the diffusion of chloride ions.

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Section: Specimen Preparationmentioning

confidence: 99%