... microstructures were obtained by processing, via surface laser melting (SLM) and sensitized at 600°C, 700°C, and 800°C. The test solution used for electrochemical testing included a buffer pH 8 brine at room conditions. The characterization of the passive conditions is done by using potentiodynamic...

...S.B. Inman; J.R. Scully The novel compositionally complex alloy (CCA) design space provides opportunities to improve corrosion resistance through design of passive films based on alloy composition and structure. The passive films are designed for thermodynamic stability as well as to provide...

... optical emission spectroscopy (GDOES). As supported by the immersion tests and electrochemical measurements, HESPed GTD-111 exhibits corrosion film with higher resistance and lower passivity current density at the expense of a higher initial corrosion rate. Both samples suffer pitting corrosion; however...

... range the IL with the hydrogensulfate anion showed an active-passive transition only at the highest water concentration. In this series at lower water concentrations, under 100‰, a model assuming a potential-independent anodic current rate correctly matched with the polarization data. The EIS...

.... ^{17 ‡} Corresponding author. E-mail: [email protected] . 10 February 2022 07 July 2022 07 July 2022 © 2022, AMPP 2022 electrochemical impedance spectroscopy heat treatment intergranular corrosion passivity scanning electron microscopy...

...S. Choudhary; N. Birbilis; S. Thomas The evolution of passivity of the multi-principal element alloy (MPEA) CoCrFeNi was studied as a function of potential, pH, and exposure duration in 0.1 M NaCl. It was shown that CoCrFeNi exhibits excellent passivity irrespective of pH, revealing a multi-oxide...

...Raymundo Case The objective of the study is to correlate the effects of H₂S and Cl⁻ concentration on the passivity limits and the onset of localized corrosion in UNS S31603 stainless steel by evaluating the changes in the semiconducting behavior exhibited by the passive layer...

.... Discussion is restricted to solid-solution binary or ternary polycrystalline alloys, several metallic glass alloys, and single phase HEAs. A common feature of many CRAs is that composition and microstructure often affect both passivity and resistance to localized corrosion that can be divided into initiation...

... H₂O (resistivity = 18.2 MΩ·cm) and dried using a stream of purified Ar. ^‡ Corresponding author. E-mail: [email protected] . 17 November 2019 06 February 2020 06 February 2020 © 2020, NACE International 2020 passivity pipelines sour corrosion steel...

...M. Eashwar; A. Lakshman Kumar; G. Sreedhar; S. Vengatesan; R. Ananth; V. Prabu The anodic kinetics of three stainless steels, viz. UNS S31600, S44660, and N08367, in gently flowing natural seawater was investigated. Potentiodynamic anodic polarization showed two distinct passive regimes emerging...

... January 2019 02 May 2019 02 May 2019 © 2019, NACE International 2019 alternating current (AC) cathodic protection corrosion rate depolarization passivity potential E-pH diagram x-ray photoelectron spectroscopy AC corrosion can produce high corrosion rates on pipelines...

...Yingying Yue; Chengjun Liu; Edouard Asselin; Peiyang Shi; Maofa Jiang H₂SO₄-H₂O₂ mixtures are a promising and environmentally friendly passivation medium for the stainless-steel pickling process. The corrosion behavior of stainless steel is highly...

...P.M. Natishan The nature of passivity and its breakdown have garnered great interest before and since Schonbein used the term “passivity” in 1836 to describe the “altered state” of iron. There has been a large body of experimental work, and a number of theories describing passivity and its...

...M. Metikoš-Huković; J. Katić; Z. Grubač; I. Škugor Rončević CoCrMo alloy has become one of the most important load-bearing materials in orthopedics. The influence of alloying components on the alloy’s electrochemical behavior (passivity, pitting corrosion, and transpassivity) has been investigated...

... biocorrosion fretting corrosion intergranular corrosion passivity pitting scanning electron microscopy tribocorrosion wear Metallic medical devices (implants) have been in use in the human body for over 180 years starting when the early dentists used silver-mercury amalgams as restorative...

... roughness, which is of importance from a manufacturing point of view, is a parameter that has received rather less attention. In the present study, the dependence of the electrochemical and the passive behavior of the positive grid alloy on electrode surface roughness was investigated. Cyclic voltammetry...

... is observed, leading to the subsequent propagation of localized corrosion, E_b can be determined by following time-dependent changes in free corrosion potential (E_corr). Breakdown of temporary passivity is marked by a clear inflection in the time-dependent value of E_corr...

... © 2017, NACE International 2017 chlorides crevice corrosion localized corrosion passivity seawater simulated crevice solutions UNS S31803 UNS S32750 Last, it is still unresolved whether metal salt precipitation is required for stable crevice or pit propagation. Some studies...

.... In this paper, a two-step AC corrosion mechanism of carbon steel under cathodic protection condition is proposed: (1) AC causes the electromechanical breakdown of the passive film formed on carbon steel under overprotection condition, and (2) after passive film breakdown, high-pH chemical corrosion takes place...

... threshold (PDT) features that update the corrosion projection as additional parts of the system begin to actively corrode. Results are consistent with field observations reported in Part 1 and supported the interpretation that the passive state of a large portion of the steel can be preserved...