Investigação da atividade eletroquímica de liga Al-Cu-Li após processo de soldagem por fricção e mistura
| Autor: | Rejane Maria P. da Silva, Mariana X. Milagre, João Victor de S. Araujo, Oscar Mauricio P. Ramirez, Caruline de Souza C. Machado, Renato A. Antunes, Isolda Costa |
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| Jazyk: | English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Química Nova, Vol 46, Iss 4, Pp 307-318 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1678-7064 0100-4042 |
| DOI: | 10.21577/0100-4042.20230014 |
| Popis: | In this work, the local electrochemical activity of the zones coupled by Friction Stir Welding (FSW) of an Al-Cu-Li alloy was studied and the results were correlated to the microstructural characteristics of each zone. Electrochemical studies were carried out in the zones affected by welding using cyclic voltammetry (CV) and scanning electrochemical techniques (namely, SECM - Scanning Electrochemical Microscopy and LEIS - Local electrochemical impedance spectroscopy). The results showed that the welding joint (WJ) is predominantly cathodic relatively to the heat affected zones (HAZ). The HAZ was always anodic and showed the highest electrochemical activities among the tested ones. The high electrochemical activity of the HAZ was associated with the effect of galvanic coupling between the cathodic region (WJ) and the anodic region (HAZ). In addition, the advancing side (AS) presented increased electrochemical activity compared to the retreating one (RS). |
| Databáze: | Directory of Open Access Journals |
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