diff --git a/Thesis.org b/Thesis.org index ee8c12c..6208aee 100644 --- a/Thesis.org +++ b/Thesis.org @@ -1263,6 +1263,48 @@ K_{IC} = 0.079 {\left( \frac{P}{a^{\frac{3}{2}}} \right)}log{\left(\frac{4.5 a } where $P$ is indenter load $[\textrm{mN}]$, $2c$ is the crack length $\left[\mu\textrm{m}\right]$, and $2a$ is the length of indentation diagonal $\left[\mu\textrm{m}\right]$ +*** Experimental electrochemical - polarize electrode to -1.5 to remove oxides + +# Prior to each measurement the electrodes were polarized at −1.50 V vs. SCE to remove oxides that were air-formed at the surface. +# \cite{metikos-hukovicPassivationCorrosionBehaviours2007} + +Passivation and corrosion behaviours of cobalt and cobalt–chromium–molybdenum alloy +Author links open overlay panelM. Metikoš-Huković +, R. Babić +https://www.sciencedirect.com/science/article/pii/S0010938X07000819 + +*** Description of constant phase element + +# \cite{metikos-hukovicPassivationCorrosionBehaviours2007} +# Because the measured capacitive response is not generally ideal, due to a certain heterogeneity of the electrode surface [34], [35], a constant phase element (CPE) is introduced for fitting the spectra, instead of an ideal capacitance element. Its impedance can be defined by Z(CPE) = [Q(jω)n]−1, where Q is a constant, ω is the angular frequency, and n is the CPE power. The factor n is an adjustable parameter which has values between −1 and 1; a value of −1 is characteristic for an inductance, a value of 1 corresponds to a capacitor, a value of 0 corresponds to a resistor, and a value of 0.5 can be assigned to diffusion phenomena [34]. + +*** Open circuit potential measurement + + +# In general, I love the format of the following paper +# https://link.springer.com/article/10.1007/s11665-025-10951-x +# ogunlakinMicrostructuralElectrochemicalCorrosion2025 + +# Great phrasing https://link.springer.com/article/10.1007/s11665-025-10951-x +# ogunlakinMicrostructuralElectrochemicalCorrosion2025 +# The open circuit potential (OCP) measurement observed the specimen’s unaltered corroding potential in the absence of any applied external current. The system is anticipated to reach a stable state when the potential is independent of the immersion duration. Consequently, the OCP indicates the electrochemical environment’s stability before system polarization, offering insights into the samples’ thermodynamic inclination towards corrosion. + +# Reference to Figure, along with whether all specimens achieve equilibrium +# https://link.springer.com/article/10.1007/s11665-025-10951-x +# ogunlakinMicrostructuralElectrochemicalCorrosion2025 +# Figure 6 illustrates the OCP values of all samples after immersion in 3.5wt% NaCl for 1 h, revealing that the specimens achieved equilibrium after the 1 h monitoring period. + +# Comparison of alloys, with specifc numbers +# https://link.springer.com/article/10.1007/s11665-025-10951-x +# ogunlakinMicrostructuralElectrochemicalCorrosion2025 +# Both the IN718 and the innovative 50 IN718-50 Co212 alloys reached a stable state, displaying a nobler potential in contrast to the Co212 alloy. Specifically, the Co212 alloy exhibited a potential of approximately − 243.7 mV, whereas the IN718 and 50 IN718-50 Co212 alloys maintained stable potentials of − 139.3 mV and − 146.1 mV, respectively, after the 1 h monitoring period. + +# Final conclusion stuff +# https://link.springer.com/article/10.1007/s11665-025-10951-x +# ogunlakinMicrostructuralElectrochemicalCorrosion2025 +# Notably, the 50 IN718-50 Co212 alloy, despite indicating an early formation of a protective film, demonstrated a continual increase in OCP over time, with the potential to surpass that of the IN718 alloy. In general, the degree of nobility of the OCP after reaching equilibrium reflects the inertness of the sample, indicating a lower propensity for corrosion in the test environment. + + *** Electrochemical instrument and experiments A Corrtest potentiostat was used for electrochemical experiments in a conventional three electrode cell, with the sample as working electrode with exposed area 2cm2, a saturated calomel electrode (SCE) as reference electrode, and a Pt plate as counterelectrode. diff --git a/references.bib b/references.bib index 6abecb8..15da89f 100644 --- a/references.bib +++ b/references.bib @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:febf61fed6dd69027783817023ce3fa668e4c6903379893fefe58c75886c8969 -size 2850763 +oid sha256:39df4337060778a3c9487563e2794625f07cd76d94333fe9fdfe0d4872a653ed +size 2855557