期刊
CORROSION SCIENCE
卷 53, 期 12, 页码 3934-3941出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.07.040
关键词
Stainless steel; Polarization; Welding; Pitting corrosion
资金
- CICBA
- Ministerio de Ciencia
- Tecnologia e Innovacion Productiva
- Agencia Nacional de Promocion Cientifica y Tecnologica [2008-1902]
Pitting corrosion was studied in welded joints of supermartensitic stainless steels. The electrochemical behavior of three different weldment zones (weld metal (WM), parent metal (PM) and heat affected zone (HAZ)) was characterized independently using an electrochemical minicell through potentiodynamic and potentiostatic techniques. The minicell design selected for this work has the additional advantage of showing promise for service application. Macro-electrochemical characterization was also used to provide a basis for comparison and check the effectiveness of minicell techniques in characterizing the corrosion resistance of welded super martensitic stainless steels. Minicell experiments exhibit a great capacity to discriminate between the different welding zones. The electrochemical response can be correlated with the microstructure of the different zones. Thermal cycles resulting from the welding procedure do not have an important effect on the amount of retained austenite or on the values of the pitting potential E(P) in the HAZ. (C) 2011 Elsevier Ltd. All rights reserved.
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