Historically, stress corrosion cracking and hydrogen embrittlement issues with aerospace high strength structural alloys have been addressed by plating parts using cadmium, chromium, or combinations thereof. However, these surface treatments are not 100% effective, and their application and the disposal of the required plating baths often result in environmental issues. For that reason, new grades have been introduced which can minimize or eliminate the use of these protective surface treatments. This paper compares recent results of stress corrosion cracking (K1scc) and hydrogen embrittlement (Kb E1F1) testing of 300M. Custom 465(R) stainless. Carpenter Ferrium(R) S53 (manufactured and sold under license from Questek Innovations LLC), and Carpenter AerMet(R) 100 alloys. These results were generated using the RSL Rising Step Load Bend Testing System. The data represent samples held at potentials ranging from open circuit, where the sample is freely corroding in 3.5% NaCI test solution, to-1. 1OVSCE (saturated calomel electrode), simulating cathodic charging while being galvanically coupled to zinc.
Comparison of stress corrosion cracking and hydrogen embrittlement resistance of high strength aerospace alloys
2010
8 Seiten, 2 Quellen
Conference paper
English
Anwendung in der Luft- und Raumfahrt , Biegeprüfung , Cadmiumzusatz , Chromieren , Eigenspannung , Galvanisieren , hochfeste Legierung , Korrosionsbeständigkeit , Legierungsbeschichten , Luftfahrzeug , Metallfilm , Oberflächenbehandlung , plattiertes Metall , Spannungsrisskorrosion , Tauchbeschichten , Wasserstoffversprödung
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