A methodological approach to estimate soil corrosivity for archaeological copper alloy artefacts

Abstract

Characterization of soil corrosivity in archaeological sites is an important subject to understand the conservation conditions of archaeological bronze collections and helps conservators to prepare a conservation strategy for long term preservation of bronze objects. In this paper, a research approach is established to identify soil corrosivity in two archaeological sites and to find correlation between corrosion events and soil characterizations. Therefore, an analytical study was carried out to identify different factors of soil environment influencing corrosivity of the soil in two sites. Based on the results, measuring different factors such as chemical composition, pH, texture, soluble salts and water content and SOM displayed different soil environments in two archaeological sites. The results represent correlative relationship between corrosion mechanism and soil characteristics in these archaeological sites.

Characterisation of Archaeological High-tin Bronze Corrosion Structures

“…Condition B, under low levels of oxygen, results in the preferential corrosion of the  phase and redeposition of metallic copper, being the  phase left uncorroded. Bearing in mind that the soil properties and chemical composition can change with time [23,55] and consequently cause variation of oxygen potential, structures originally of Condition A can evolve to structures typical of Condition B and vice-versa. In Fig.…”

An old problem in a new light: Elemental and lead isotopic analysis of Luristan Bronzes

“…It has been excavated in six seasons from 2006 to 2011, which has led to the discovery of an Iron Age sanctuary constructed from stone fragments (Figure 2b and 2c) in which numerous metallic artefacts attributed to the Luristan Bronzes were found. The excavation site report is soon to be published by Dr. Zahra Hashemi and colleagues (Dr. Ata Hasanpour and Dr. Mehrdad Malekzadeh) and earlier preliminary publications on the excavations include: Oudbashi et al, 2013;Oudbashi et al, 2016a;Malekzadeh et al, 2017;2018;Hasanpur and Malekzadeh, 2019). Archaeological excavations yielded no evidence of graves, but rather, more than 2000 diverse metal artefacts attributed to the Luristan Bronzes' style, ranging in character from simple to sophisticated types.…”

Corrosion Predictive Model in Hot‐Dip Galvanized Steel Buried in Soil

“…Soil is a complex and highly heterogeneous environment whose local characteristics damage buried or semiburied steel structures [1]. e main cause of failure of this type of structure is the corrosion [2,3].…”