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Optical microscopy images of as tested C-276 C-rings. Pitting corrosion was evident on the stressed inner edge of the C-rings and on the surface. A more detailed analysis showed that also intercrystalline corrosion had taken place with the loss of occasional grains because of the applied stress in combination with corrosion.

More detailed information can be found in: Daniel Blücher, Torstein Lange, Judit Sandquist, Inge Saanum, Mikko Uusitalo, Corrosion performance of different alloys exposed to HTL conditions—a screening study, Materials and Corrosion 2024, 75, 1258.

Pre-loading of C-rings from material candidates with a strain gauge to achieve the desired yield strength. Exposure of these C-rings to real HTL conditions (flowing, 390°C, 300 bars, black liquor, 18 days).

The initial stages of corrosion of high-alloyed steel under a KCl deposit were studied utilizing synchrotron-based X-ray diffraction and subsequent microscopic analysis. The impact of alloying content on KCl-induced corrosion in an early stage is demonstrated.

The released amount of alloying constituents from weathering steels exposed to urban atmospheric conditions is below the corresponding limits of the drinking water guidelines recommended by the World Health Organisation.

Electrochemical measurements on galvanized steel can be carried out more easily on practical components using gel electrolytes and show good agreement with laboratory measurements. The electrochemically determined cover layer resistance is a useful characteristic value for evaluating the current condition and further corrosion progression.

This study investigated a novel potentiostatic polarization method for cerium conversion coating (CeCC), comparing it to the conventional immersion method. Potentiostatic deposition conditions (−1.2 V, 10 min) resulted in crack-free surface with denser and larger $${\mathrm{CeO}}_{2}$$ deposits. Potentiostatically deposited CeCC showed significantly lower corrosion current density and higher charge transfer resistance compared to immersion_CeCC. It exhibited five times higher charge transfer resistance and twice lower corrosion rate than uncoated specimens.

PANI/GO hybrid with dodecylbenzene sulfonic acid as a dopant is synthesized using the in-situ emulsion polymerization method. This synthesis prompts a significant rearrangement of electron clouds within both the GO and PANI molecular structures, resembling the process of acid doping. Finally, the corrosion resistance property of the GO/epoxy coating is improved.

The corrosion defects increase with time. As the pressure increases, the failure pressure of the pipeline gradually decreases. The increase in internal pressure causes local plastic deformation and anodic current density concentration at the inner edge of the defect and in the adjacent areas of the defect. The influence of defect depth on the corrosion rate at the defect is greater than that of defect width.

This study explored friction stir welding (FSW) impact on AA2098-T351 welds, focusing on microstructural changes and intergranular corrosion susceptibility. Electrochemical impedance measurements and ASTM G110-92 were employed, revealing FSW-induced microstructural alterations significantly affecting intergranular corrosion (IGC) susceptibility. The ASTM G110-92 test differentiated heat-affected zone segments, influencing diverse zone susceptibilities to IGC.

The crevice corrosion of high-strength Al alloy shows a complicated behavior in solution with different contents of NaCl. The crevice corrosion was more pronounced in the 0.5 M NaCl solution compared to 0.05 and 1 M NaCl solution. The rapid dissolution of the anodic phase resulted in the increased Cl⁻ inside the crevice, while the cathodic phase enhanced the localized dissolution through micro-galvanic corrosion. This synergistic effect significantly facilitated the development of crevice corrosion.