Electrochemical Corrosion Characteristics of Maraging Steel Welds Depending on Chromium Content

摘要

The corrosion behavior of maraging steel weldments which depend on Cr content has been studied,and electrochemical experiments were conducted changing the immersion time in chloride solution.The study was carried out using open-circuit potential, potentiodynamic polarization, electrochemicalimpedance spectroscopy techniques. The results showed that corrosion rate decreased and Ecorr and Epitincreased with increasing Cr content and also with increased with immersion time of the maragingsteel before measurements. The surface morphology of the corroded samples has been examined byScanning Electron Microscopy. It showed that the resistance to general and pitting corrosion increasedas the Cr content increased.