Session: FSI-02-03 Vortex Shedding

Paper Number: 122896

122896 - In-Situ Electrochemical Investigation of Fretting Corrosion Synergistic Damage Mechanism of 316l Stainless Steel With Different Temperature 

In the nuclear industry, expensive maintenance strategies must be considered to meet the demand for extending the lifespan of nuclear power plants. Therefore, investigating the damage mechanism of materials has become one of the most important ways to reduce the costs. The fretting wear damage of steam generator tubes is one of the typical damage modes, which has been widely investigated. However, when the tubes are subjected to the corrosive environment, complex synergistic damage mechanism between wear and corrosion could be produced. In this study, a high-temperature and high-pressure fretting corrosion test rig with in-situ electrochemical measurement system was established. Fretting corrosion test of 316L stainless steel under deionized water containing 0.05 mol/L sodium chloride was carried out with temperatures of 95℃, 150℃, and 200℃, respectively. The corrosion data during the experiments were recorded, and the damaged surface morphology was characterized. A calculation method which is collected in ASTM G119 was used in this study to quantify the contribution of wear, corrosion, and synergistic damage to the total fretting corrosion volume loss. Based on these results, the synergistic damage mechanism was analyzed and it deeply elucidated the connection between wear and corrosion, which could help to optimize maintenance strategies in the nuclear industry.

Presenting Author: Shengzan Zhang Tianjin University

Presenting Author Biography: The presenting author is a doctoral student from Tianjin University in China, with a research focus on the fretting corrosion synergistic damage mechanism of process equipment materials.

Authors:

Shengzan Zhang Tianjin University
Liyan Liu Tianjin University
Wenjie Pei Tianjin University
Wei Tan Tianjin University
Guorui Zhu Tianjin University