ELKEME team members, Ms. M. Bouzouni and Ms. S. Papadopoulou participated to the International Conference of Engineering Against Failure (ICEAF), which was held in Chios Island, June 20-22, 2018. They contributed to the presentation of two papers in oral sessions of the Conference.
- Hydrogen Induced Crack Development in Submerged Arc Welded Steel Pipes. [M. Bouzouni, E. Gavalas, F. Chatzigeorgiou, S. Papaefthymiou].
The paper presents the investigation of susceptibility in Hydrogen Induced Cracking (HIC) in High Strength Low Alloyed (HSLA) pipeline steels welded according to the Longitudinal Submerged Arc Welding (LSAW) method in usual LSAW pipeline productions that were not designed to resist in sour environments. In the frame of this study, optical and scanning electron microscopy was conducted on each zone of the weld. To evaluate the sensitivity in HIC the indexes Cracking Length Ratio (CLR), Cracking Thickness Ratio (CTR) and Cracking Sensitivity Ratio (CSR) were measured.
- Copper tubing failure due to ant-nest corrosion. [A. Vazdirvanidis, S. Papadopoulou, S. Papaefthymiou, G. Pantazopoulos, D. Skarmoutsos]
Ant-nest corrosion is a type of rapidly evolving and localized failure, which is observed in Cu tubes used mainly in air-conditioning and heat exchanger units, induced mainly by the presence of organic matter and humidity. In the present paper, relevant case histories are documented employing metallographic and scanning electron microscopy examination on cross-sections, revealing the action of such complex through-thickness propagating pitting corrosion mechanism.