Corrosion products and microstructure of copper alloy coins from the Byzantine-period Ma'agan Mikhael B shipwreck, Israel

A. Inberg; D. Ashkenazi; M. Cohen; N. Iddan; D. Cvikel

doi:10.1016/j.microc.2018.08.033

Corrosion products and microstructure of copper alloy coins from the Byzantine-period Ma'agan Mikhael B shipwreck, Israel

A. Inberg, D. Ashkenazi^*, M. Cohen, N. Iddan, D. Cvikel

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

Seven coins, covered with black concretion coating, found in the Byzantine-period Ma'agan Mikhael B shipwreck, were examined in this study. Metallurgical methods comprising visual testing, XRF, multi-focal light microscopy, SEM-EDS analysis and Raman spectroscopy, were used to determine the corrosion products and microstructure of the coins. The analysis results show that the coins were made of copper-lead alloy with a heterogeneous microstructure of bright and dark metal areas. The external surfaces of the coins were mostly composed of oxides and corrosion product compounds rich in Cu, Pb and Sn, while the external dark concretion coating was rich in Si, S, Ca and C compounds. Gradual variation of the composition and structure of the oxides and concretion coating layers was observed.

Original language	English
Pages (from-to)	400-409
Number of pages	10
Journal	Microchemical Journal
Volume	143
DOIs	https://doi.org/10.1016/j.microc.2018.08.033
State	Published - Dec 2018

Funding

Funders	Funder number
Honor Frost Foundation
Israel Science Foundation	1891/16
University of Haifa

Keywords

Black concretion
Copper-lead coins
Corrosion products
Ma'agan Mikhael B shipwreck
Materials characterization
Microstructure

Access to Document

10.1016/j.microc.2018.08.033

Cite this

@article{d5bdc0b56fcf4f49bc9f5fa97a41d446,

title = "Corrosion products and microstructure of copper alloy coins from the Byzantine-period Ma'agan Mikhael B shipwreck, Israel",

abstract = "Seven coins, covered with black concretion coating, found in the Byzantine-period Ma'agan Mikhael B shipwreck, were examined in this study. Metallurgical methods comprising visual testing, XRF, multi-focal light microscopy, SEM-EDS analysis and Raman spectroscopy, were used to determine the corrosion products and microstructure of the coins. The analysis results show that the coins were made of copper-lead alloy with a heterogeneous microstructure of bright and dark metal areas. The external surfaces of the coins were mostly composed of oxides and corrosion product compounds rich in Cu, Pb and Sn, while the external dark concretion coating was rich in Si, S, Ca and C compounds. Gradual variation of the composition and structure of the oxides and concretion coating layers was observed.",

keywords = "Black concretion, Copper-lead coins, Corrosion products, Ma'agan Mikhael B shipwreck, Materials characterization, Microstructure",

author = "A. Inberg and D. Ashkenazi and M. Cohen and N. Iddan and D. Cvikel",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = dec,

doi = "10.1016/j.microc.2018.08.033",

language = "אנגלית",

volume = "143",

pages = "400--409",

journal = "Microchemical Journal",

issn = "0026-265X",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Corrosion products and microstructure of copper alloy coins from the Byzantine-period Ma'agan Mikhael B shipwreck, Israel

AU - Inberg, A.

AU - Ashkenazi, D.

AU - Cohen, M.

AU - Iddan, N.

AU - Cvikel, D.

PY - 2018/12

Y1 - 2018/12

N2 - Seven coins, covered with black concretion coating, found in the Byzantine-period Ma'agan Mikhael B shipwreck, were examined in this study. Metallurgical methods comprising visual testing, XRF, multi-focal light microscopy, SEM-EDS analysis and Raman spectroscopy, were used to determine the corrosion products and microstructure of the coins. The analysis results show that the coins were made of copper-lead alloy with a heterogeneous microstructure of bright and dark metal areas. The external surfaces of the coins were mostly composed of oxides and corrosion product compounds rich in Cu, Pb and Sn, while the external dark concretion coating was rich in Si, S, Ca and C compounds. Gradual variation of the composition and structure of the oxides and concretion coating layers was observed.

AB - Seven coins, covered with black concretion coating, found in the Byzantine-period Ma'agan Mikhael B shipwreck, were examined in this study. Metallurgical methods comprising visual testing, XRF, multi-focal light microscopy, SEM-EDS analysis and Raman spectroscopy, were used to determine the corrosion products and microstructure of the coins. The analysis results show that the coins were made of copper-lead alloy with a heterogeneous microstructure of bright and dark metal areas. The external surfaces of the coins were mostly composed of oxides and corrosion product compounds rich in Cu, Pb and Sn, while the external dark concretion coating was rich in Si, S, Ca and C compounds. Gradual variation of the composition and structure of the oxides and concretion coating layers was observed.

KW - Black concretion

KW - Copper-lead coins

KW - Corrosion products

KW - Ma'agan Mikhael B shipwreck

KW - Materials characterization

KW - Microstructure

UR - http://www.scopus.com/inward/record.url?scp=85052067650&partnerID=8YFLogxK

U2 - 10.1016/j.microc.2018.08.033

DO - 10.1016/j.microc.2018.08.033

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:85052067650

SN - 0026-265X

VL - 143

SP - 400

EP - 409

JO - Microchemical Journal

JF - Microchemical Journal

ER -

Corrosion products and microstructure of copper alloy coins from the Byzantine-period Ma'agan Mikhael B shipwreck, Israel

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this