Search results for " corrosion inhibitors"

showing 3 items of 3 documents

Inhibition of Cor-Ten steel corrosion by “green” extracts of Brassica campestris

2018

Abstract Extract of Brassica campestris was tested as potential corrosion inhibitor for Cor-Ten steel in NaCl and acidic solutions, simulating a marine and an urban-industrial environment, respectively. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were performed both in absence and in presence of the extract at room temperature. The surface chemical analysis was investigated by X-ray Photoemission Spectroscopy (XPS), before and after corrosion. Electrochemical results demonstrated that a very small concentration of Brassica campestris extracts can inhibit Cor-Ten corrosion in NaCl solution (inhibition efficiency of 80–84%) better than in acidic solutions. Su…

Materials sciencePhotoemission spectroscopyGeneral Chemical EngineeringBrassica02 engineering and technologyWeathering steelengineering.material010402 general chemistryElectrochemistry01 natural sciencesAcidic corrosionCorrosion'Green' corrosion inhibitorsCorrosion inhibitorchemistry.chemical_compoundMarine corrosionX-ray photoelectron spectroscopyWeathering steelGeneral Materials ScienceChemical Engineering (all)Acidic corrosion; Brassica campestris; Cor-Ten; Marine corrosion; Weathering steel; ‘Green’ corrosion inhibitors; Chemistry (all); Chemical Engineering (all); Materials Science (all)biologyChemistry (all)fungifood and beveragesGeneral Chemistry021001 nanoscience & nanotechnologybiology.organism_classificationBrassica campestris'Green' corrosion inhibitor0104 chemical sciencesDielectric spectroscopychemistryCor-TenBrassica campestriengineeringMaterials Science (all)0210 nano-technology‘Green’ corrosion inhibitorsNuclear chemistry
researchProduct

Recovering bronze metallurgy from archaeological artefacts for the production of reference materials in conservation science

2007

The production of reference Cu-based alloys is the first step of an original experimental protocol to be used in the field of conservation and restoration of metal artefacts. The production of these synthetic alloys has a double value. They can be used both as suitable substitutes of unique archaeological pieces for testing new materials and methods for conservation, and as guidelines for contemporary metal production. We report on a research activity focused on the recovery of the ancient production techniques from the investigation of archaeological copper-based artefacts. The chemical, physical and metallurgical characterization of several Cu-based artefacts, found in different Italian a…

Archaeological bronze artefacts Recovery of ancient techniques Cu-based alloys Reference Materials Corrosion Inhibitors Bronze disease Metal ConservationSettore CHIM/12 - Chimica Dell'Ambiente E Dei Beni Culturali
researchProduct

A novel scientific approach to the conservation of archaeological copper alloys artefacts

2007

A novel research approach focused on innovative materials and methods to assure the long-term stability of bronze archaeological artefacts during exhibition and storage is reported. The work deals with the application of advanced analytical techniques and the development, characterisation and testing of materials and procedures for the conservation, protection and restoration of ancient Cu-based alloy artefacts. Our first aim was the selection of Cu-based alloy artefacts from different archaeological sites in Southern Italy with respect of chemical composition, metallurgical features and corrosion products. This step allowed the identification of the ancient alloys, the study of natural pat…

archaeology copper-based alloys bronze disease corrosion inhibitors reference materials conservation of metalsSettore CHIM/12 - Chimica Dell'Ambiente E Dei Beni Culturali
researchProduct