Corrosion study of the X52 steel immersed in seawater with a corrosion inhibitor using a rotating cylinder electrode

Galván-Martínez, Ricardo; Orozco-Cruz, Ricardo; Torres-Sanchez, R.; Martínez, Enrique Antonio Rodríguez

doi:10.1002/maco.200905441

Cited by 19 publications

(11 citation statements)

References 25 publications

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“…Regarding the results of the samples without HT, it is possible to observe that the oxidation reaction in all the anodic branches, at every temperature, does not belong to pure charge transfer process (Tafel slopes values are 0.16 V per current decade, approximately) whereas for the HT samples the oxidation reaction corresponds to a charge transfer process (pure corrosion process). The cathodic branches for both microstructural conditions reveal a mix process, where the charge transfer resistance (activational process) is influenced by a mass transfer process (diffusional process), meaning that Tafel slopes are higher than 0.35 V per current decade .…”

Section: Resultsmentioning

confidence: 99%

Stress corrosion cracking assessment of API X65 steel non‐conventionally heat treated

Natividad

Garcı́a

López

et al. 2015

Materials & Corrosion

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Stress corrosion cracking (SCC) susceptibility of API X65 steel nonconventionally heat-treated was evaluated through slow strain rate tests (SSRTs) using the synthetic soil solution NS4 at 20, 40 and 60 8C. Polarization curves (PCs) and corrosion potential (E corr ) measurements were also performed. The non-conventional heat treatment (HT) was made by heating plates at 1050 8C for 30 min followed by water quenching. The tensile strength of the heat-treated plates increased to values similar to API X80 steel. The SCC index obtained by ratios of mechanical properties indicated that X65 steel without HT is not susceptible to SCC whereas with HT is slightly susceptible to SCC. The SCC mechanism in the soil solution in the heat-treated plates was influenced by hydrogen diffusion as confirmed by the internal cracks and the brittle fracture observed in the specimens. The electrochemical study suggests that the corrosion process of X65 steel with and without HT occurs via a mix mechanism where the charge transfer resistance is influenced by a mass transfer process. Crevice corrosion features were found in the surface of the steel. It is likely that this type of corrosion could have sensitized the X65 steel and induced cracks when the steel was under tensile stress.

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Section: Resultsmentioning

confidence: 99%

Stress corrosion cracking assessment of API X65 steel non‐conventionally heat treated

Natividad

Garcı́a

López

et al. 2015

Materials & Corrosion

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“…Zn is calculated by the square root of the PSD division of potential and current [ 33 , 41 , 55 ]. The electrochemical noise impedance is related to the corrosion resistance, and the inverse is related to the conductance and corrosion rates [ 37 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

A Comparative Study of Corrosion AA6061 and AlSi10Mg Alloys Produced by Extruded and Additive Manufacturing

et al. 2021

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The aim of this work was to evaluate the corrosion behavior of the AA6061 and AlSi10Mg alloys produced by extruded and additive manufacturing (selective laser melting, SLM). Alloys were immersed in two electrolytes in H2O and 3.5 wt. % NaCl solutions at room temperature and their corrosion behavior was studied by electrochemical noise technique (EN). Three different methods filtered EN signals, and the statistical analysis was employed to obtain Rn, the localization index (LI), Kurtosis, skew, and the potential spectral density analysis (PSD). The Energy Dispersion Plots (EDP) of wavelets method was employed to determine the type of corrosion and the Hilbert–Huang Transform (HHT), analyzing the Hilbert Spectra. The result indicated that the amplitude of the transients in the time series in potential and current is greater in the AlSi10Mg alloy manufactured by additive manufacturing. The amplitude of the transients decreases in both alloys (AA6061 and AlSi10Mg) as time increases.

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“…Z n is calculated by the square root of the PSD division of potential and current [56,64]. The electrochemical noise impedance is related to the corrosion resistance, and the inverse is related to conductance and corrosion rate [65,66]. The results concerning type and corrosion mechanisms presented some uncertainty for slope analysis [60][61][62].…”

Section: Noise Impedance (Z N )mentioning

confidence: 99%

Section: Noise Impedance (Zn)mentioning

confidence: 99%

Frequency Analysis of Transients in Electrochemical Noise of Superalloys Waspaloy and Ultimet

Jáquez-Muñoz

Gaona‐Tiburcio

Miramontes

et al. 2021

Metals

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Nickel or Cobalt-based superalloys represent an important class of engineering materials, finding widespread application in critical components within the gas turbine engines used for jet propulsion and electricity generation. This research aimed at the frequency analysis of transients in electrochemical noise of Waspaloy and Ultimet superalloys, immersed in 3.5 wt.% in H2SO4 and NaCl solutions at two different temperatures, 25 and 60 °C. Localized corrosion behavior of superalloys was assessed using the electrochemical noise technique (EN) according to ASTM-G199 standard. Three different statistical methods filtered the EN signal, and the polynomial method was employed to obtain the noise resistance (Rn), the localization index (LI), skew and kurtosis, and the power spectral density analysis (PSD). Results indicate that the current and potential noise transients have a better behavior with better clarity when a polynomial is used to show a localized corrosion kurtosis for both superalloys.

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Corrosion study of the X52 steel immersed in seawater with a corrosion inhibitor using a rotating cylinder electrode

Cited by 19 publications

References 25 publications

Stress corrosion cracking assessment of API X65 steel non‐conventionally heat treated

Stress corrosion cracking assessment of API X65 steel non‐conventionally heat treated

A Comparative Study of Corrosion AA6061 and AlSi10Mg Alloys Produced by Extruded and Additive Manufacturing

Frequency Analysis of Transients in Electrochemical Noise of Superalloys Waspaloy and Ultimet

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