scholarly journals Assessing of New Coatings for Iron Artifacts Conservation by Recurrence Plots Analysis

Coatings ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 12 ◽  
Author(s):  
Paola Roncagliolo Barrera ◽  
Francisco Rodríguez Gómez ◽  
Esteban García Ochoa
Keyword(s):  
Cast Iron ◽  
Statistical Analysis ◽  
Corrosion Inhibitors ◽  
Electrochemical Noise ◽  
High Humidity ◽  
Recurrence Plots ◽  
Surface Corrosion ◽  
Temporary Protection ◽  
Protection Method ◽  
Iron Artifacts

Cast iron has stood for centuries of invention. It is a very versatile and durable material. Coating systems are a low-maintenance protection method. The purpose of this research is to increase the Paraloid coating’s resistance when applied to iron in high humidity atmospheres, with the addition of caffeine (1,3,7-dimethylxanthine) and nicotine (S)-3-(1-methylpyrrolidin-2-yl) pyridine as corrosion inhibitors; the resistance of protection versus exposure time will be evaluated by using electrochemical noise. A statistical analysis of the electrochemical noise signals was carried out. Recurrence plots were used as a powerful tool in the analysis to complement the data obtained and they predicted the evaluation of coatings behaviors performance versus time. The outcomes show that the addition of inhibitors increases and improves the performance as a temporary protection of Paraloid and that protection in high relative humidity was improved. Recurrence plots and parameter quantification show the variances in the surface corrosion dynamics.

Internal oxidation of cast iron artifacts from an 18th-century steel cementation furnace

2012 ◽  
Vol 39 (8) ◽  
pp. 2714-2721 ◽  
Author(s):  
Colin Thomas ◽  
Richard Hunter ◽  
Robert Gordon
Keyword(s):  
Cast Iron ◽  
Internal Oxidation ◽  
18Th Century ◽  
Iron Artifacts

The Technological and Chronological Implication of 14C Concentrations in Carbon Samples Extracted from Mongolian Cast Iron Artifacts

Radiocarbon ◽  
2019 ◽  
Vol 61 (03) ◽  
pp. 831-843 ◽  
Author(s):  
J S Park ◽  
W Honeychurch ◽  
A Chunag
Keyword(s):  
Cast Iron ◽  
17Th Century ◽  
Metallographic Examination ◽  
Multiple Users ◽  
Melt Treatment ◽  
History Of ◽  
Iron Artifacts ◽  
Eastern Mongolia ◽  
Early Historic

ABSTRACTCast iron objects recovered primarily in eastern Mongolia, spanning the Xiongnu through the Early Historic periods (ca. 3rd BC–AD 17th century), were examined for their radiocarbon (14C) concentration and microstructure. Most of the samples examined were found to have originated from charcoal-based smelting with a few exceptions that were made using a mineral coal-based technique. A comparison of 14C dates with dates derived from artifact typology allowed the charcoal-smelted objects to be classified into two groups, based on whether the radiometric and typological periodization are in agreement or not. In addition, those with differing 14C and typological dates can be divided into two subgroups with and without evidence for a melt treatment applied after original casting. These conflicting dating results are confusing and would seem to provoke skepticism about the use of 14C measurements for dating iron artifacts. We demonstrate however that 14C analysis, when combined with metallographic examination and other lines of chronological evidence, can clarify the history of a given iron object and its multiple users, often separated in time by more than a millennium.

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