Cieślik Mateusz, Orlikowski Juliusz, Krakowiak Stefan, Żakowski Krzysztof
Institute of Nanotechnology and Materials Engineering, Faculty of Applied Science and Mathematics, Gdansk University of Technology, Narutowicza 11/12 Str., 80-233 Gdansk, Poland.
Department of Corrosion and Electrochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12 Str., 80-233 Gdansk, Poland.
Materials (Basel). 2025 Jan 3;18(1):167. doi: 10.3390/ma18010167.
Mechanical stress is one of the factors influencing the initiation of pitting corrosion and deterioration of the protective properties of the passive layer on stainless steel. The tests carried out on AISI 304L stainless steel showed that, in the 3.5% NaCl environment for samples loaded in the elastic and plastic range, no pitting corrosion initiation was observed. Only mechanical damage of the passive layer occurred. Galvanodynamic electrochemical impedance spectroscopy (g-DEIS) was used as the measuring technique. This technique ensures the monitoring of corrosion processes at zero external current (I = 0) and no potential perturbation of the system. It also allows one to perform many measurements, so that short-term changes such as cracking of the layer and its repassivation are possible to monitor.
机械应力是影响点蚀起始以及不锈钢钝化层保护性能劣化的因素之一。在AISI 304L不锈钢上进行的试验表明，在3.5%氯化钠环境中，对于处于弹性和塑性范围内加载的样品，未观察到点蚀起始。仅发生了钝化层的机械损伤。动电位电化学阻抗谱（g-DEIS）被用作测量技术。该技术可确保在外部电流为零（I = 0）且系统无电位扰动的情况下监测腐蚀过程。它还允许进行多次测量，从而能够监测诸如层的开裂及其再钝化等短期变化。
