Corrosion of Cellular Metals in Marine Environments
2006
Scully, John R.
The specific objective of this research is to establish the foundation to enable the next generation of corrosion resistance cellular metals for high performance naval applications. The basis for this work is an interdisciplinary approach that aims to understand: (a) the electrochemical, chemical, and metallurgical conditions that corrode cellular metals in marine environments when fabricated by brazing processes, (b) the impact of braze fabrication time, temperature and diffusion length on corrosion resistance and optimization of the same, and (c) elucidation of corrosion mechanisms so as to provide fundamental information on processes that govern corrosive attack and guide mitigation strategies whether by protection of existing braze materials or by design of new brazing materials. Specifically FY 2005 was dedicated to elucidating the corrosion mechanisms of a super-austenitic stainless steel Al-6XN (Fe-24Ni-20Cr-6.3Mo-0.22N) when brazed with a commercial Nicrobraze alloy (Nicrobraze 31: Ni-22Cr-6.3Si-3.8P).
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