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Conserv Management Archaeol Sites 7 (4)
Title
The title of the publication or report
Title:
Conserv Management Archaeol Sites 7 (4)
Series
The series the publication or report is included in
Series:
Conservation and Management of Archaeological Sites
Volume
Volume number and part
Volume:
7 (4)
Publication Type
The type of publication - report, monograph, journal article or chapter from a book
Publication Type:
Journal
Editor
The editor of the publication or report
Editor:
Nicholas Stanley-Price
Publisher
The publisher of the publication or report
Publisher:
James & James (Science Publishers) Ltd
Year of Publication
The year the book, article or report was published
Year of Publication:
2006
Source
Where the record has come from or which dataset it was orginally included in.
Source:
BIAB (The British & Irish Archaeological Bibliography (BIAB))
Created Date
The date the record of the pubication was first entered
Created Date:
02 Nov 2006
Please click on an Article link to go to the Article Details.
Article Title
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Author / Editor
Page
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Abstract
Assessing the influence of agrochemicals on the rate of copper corrosion in the vadose zone of arable land.; Part 2: laboratory simulations
Mark M Pollard
Lyn Wilson
Andrew S Wilson
Allan J Hall
225 - 239
Second in a series of three papers from a project that has attempted to answer the question `does the application of agrochemicals accelerate the corrosion of archaeological metals in the top 50cm of the soil?'. The authors approached the issue through a combination of field-based experiments, by establishing laboratory microcosms and by using geochemical modelling techniques to understand the processes involved. The paper reports on two different experimental approaches in the laboratory -- a microcosm designed to mimic one of the burial sites (the `Lab Bin' experiments), and a simpler one to understand the reaction between metal samples and concentrated aqueous solutions of the fertilisers and laboratory reagents used (the `Lab Beaker' experiments). The bins were monitored for in situ corrosion for seven weeks, and then the coupons examined. The authors focus on a sub-set of the data relating to the behaviour of the thinnest samples of copper in each case. As with the field data previously reported, the results are sometimes contradictory, but on balance it is considered that the project has demonstrated that applied agricultural chemicals are likely to accelerate the rate of corrosion of metal objects within 50cm of the surface. In particular it is considered likely that any fertilizers containing KCI will be particularly aggressive. Includes French and Spanish summaries.
Assessing the influence of agrochemicals on the nature of copper corrosion in the vadose zone of arable land.; Part 3: geochemical modelling
Lyn Wilson
Mark M Pollard
Allan J Hall
Andrew S Wilson
241 - 260
Third in a series of three papers from a project that has attempted to answer the question `does the application of agrochemicals accelerate the corrosion of archaeological metals in the top 50cm of the soil?'. The authors approached the issue through a combination of field-based experiments, by establishing laboratory microcosms and by using geochemical modelling techniques to understand the processes involved. The paper reports on the geochemical modelling simulations that trace the potential corrosion pathways followed in two sets of laboratory microcosm experiments (`Lab Beakers' and `Lab Bins') and one field experiment (at Palace Leas). This approach uses soil solution as the fluid mediating corrosion in the soil vadose zone. Soil solution was displaced following controlled exposure to fertilisers. Modelling using The Geochemists' Workbench was carried out to mimic the experimental conditions, and predictions were compared with image analysis results, limited XRD analysis and published corrosion observations. The authors focus on a sub-set of the data relating to the behaviour of the thinnest samples of copper in each case. As with the field and laboratory data previously reported, the results are sometimes contradictory, but on balance it is considered that the project has demonstrated that applied agricultural chemicals are likely to accelerate the rate of corrosion of metal objects within 50cm of the surface. In particular it is thought likely that any fertilizers containing KCI (`potash') will be particularly aggressive. It is proposed that geochemical modelling generates plausible corrosion predictions based on post-depositional interaction between archaeological copper and soil solution, and appears to be useful in helping to simplify and understand corrosion pathways in naturally complex systems. Includes French and Spanish summaries.