Corrosion analysis and characteristics of discarded military munitions in ocean waters. (January 2016)

• Record Type: Journal Article
• Authors: Li, Shengxi; George, Robert D.; Hihara, L.H.
• Is Part Of: Corrosion science. Volume 102(2016)
• Page Start: 36
• Page End: 43
• Publication Date: 2016-01
• Subjects: A. Copper -- A. Steel -- B. Raman spectroscopy -- B. SEM -- B. XRD -- C. Rust; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2015.09.014
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: Corrosion characteristics of discarded military munitions in seawater were studied. β-Fe2 (OH)3 Cl was identified as the primary phase in the inner rust layer. Fe3 O4 and β-FeOOH were also detected in the inner rust layer. A thick concretion layer formed outside of the β-Fe2 (OH)3 Cl layer. The results can be used for future modeling efforts to predict DMM casing breaches. Abstract: The retrieval of discarded military munitions (DMM) from the seafloor of Ordnance Reef (OR), Hawaii after more than 60 years of exposure presented a unique opportunity to study and characterize the actual DMM corrosion morphology. An iron hydroxychloride was identified as the primary phase together with Fe3 O4 and β-FeOOH in the inner rust layer on the projectile. A thick concretion layer consisting of an inner black FeCO3 layer and an outer grayish-white CaCO3 layer formed outside of the iron hydroxychloride layer. Iron sulphide was also detected in the black concretion layer, indicating the effect of sulphate-reducing bacteria.