Electrochemical investigation on the hydrogen permeation behavior of 7075-T6 Al alloy and its influence on stress corrosion cracking

The hydrogen permeation behavior and stress corrosion cracking (SCC) susceptibility of precharged 7075-T6 Al alloy were investigated in this paper. Devanthan–Stachurski (D-S) cell tests were used to measure the apparent hydrogen diffusivity and hydrogen permeation current density of specimens immers...

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Veröffentlicht in:	International journal of minerals, metallurgy and materials metallurgy and materials, 2015-07, Vol.22 (7), p.729-737
Hauptverfasser:	Zheng, Chuan-bo, Yan, Bing-hao, Zhang, Ke, Yi, Guo
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum base alloys Anodic polarization Ceramics Characterization and Evaluation of Materials Chemistry and Materials Science Composites Corrosion Corrosion and Coatings Electrochemistry Electrode polarization Glass Hydrogen Hydrogen permeation Materials Science Metallic Materials Natural Materials Permeation Sodium chloride Stress corrosion Stress corrosion cracking Surfaces and Interfaces Thin Films Tribology
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Beschreibung
Zusammenfassung:	The hydrogen permeation behavior and stress corrosion cracking (SCC) susceptibility of precharged 7075-T6 Al alloy were investigated in this paper. Devanthan–Stachurski (D-S) cell tests were used to measure the apparent hydrogen diffusivity and hydrogen permeation current density of specimens immersed in 3.5wt% NaCl solution. Electrochemical experiment results show that the SCC susceptibility is low during anodic polarization. Both corrosion pits and hydrogen-induced cracking are evident in scanning electron microscope images after the specimens have been charging for 24 h.
ISSN:	1674-4799 1869-103X
DOI:	10.1007/s12613-015-1128-5