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Construction steel of oil facilities manifests different affectations for corrosion phenomenon. One of the main causes constitutes for corrosion is the presence of the accompanying water of the petroleum. The one mentioned corrosive medium it is conductive of the electric current and for their varied composition: carbon dioxide (CO2), hydrogen sulphide (H2S) and chlorides in dissolution, they generate inside corrosion. As a result of this process, they corrosion products are formed such as: iron sulphide (II) and iron carbonate (II) in dependence of the operation conditions: temperature, the corrosive agent's concentration and pressure. In the present paper the fundamental objective was to establish at laboratory scale the chemical and morphology composition of the corrosion products that are formed during the construction pipelines steel corrosion, in a saline polluted medium with carbon dioxide and hydrogen sulphide to 70°C, according at operation conditions. The spectroscopy dispersive of rays X energy technique allowed the obtaining the elementary composition of the chemical compounds and bay rays X diffraction were detected iron oxihydroxides: lepidocrocite (- FeOOH) and goethite (- FeOOH) . The Scanning Electron Microscopy identified different morphologies: lengthened cubes, splinter, floral structure, muddy or cracked sedimentary and sandy, those that are composed mainly by iron and oxygen. [ABSTRACT FROM AUTHOR]

The actual development of electronics and computers has allowed developing methods for measuring corrosion in real time and at very short periods. The generation of new knowledge has allowed using physicochemical methods to determine corrosion very fast and store the data obtained. The information contained in patent documents claiming these new advanced technologies is of great value to generate knowledge that respond to the problems and needs of the R + D + i related to the continuous measurement of corrosion in transport vehicles and other instruments and equipment. Distance monitoring is important in these cases where the vehicle is moving. It is very important for operation and maintenance and for the evaluation of the protective products against corrosion. The aim of this paper is to generate new knowledge from the application of the methodology Generation and Knowledge Management (MGGC), from which the search strategy that inventions claiming keywords recovered was determined: corrosion sensor and monitoring, patent databases freely available on internet. The results obtained from the processing of the information contained in these patent documents identified the strategic objectives of an R + D + i related corrosion monitoring by sensors. [ABSTRACT FROM AUTHOR]

This paper presents the results of the case study of a building of four levels affected by corrosion of the steel reinforcement concrete beams in the third and fourth levels. Due to modernizations in the architecture of its façade, consequently was formed a micro-environment inside the building at the above mentioned levels. The purpose of this study is to determine the influence of micro-environment on the corrosion of steel bars, through comparative tests between the four levels of the building. The tests performed were based on destructive and non-destructive techniques executed on the secondary beams that support the ceilings of the lowers and uppers levels of the building. The study took into account the relation of equilibrium between the ambient relative humidity and the water absorption capacity of the secondary beams of concrete tested. Results were expressed as the relative humidity profiles, and the values obtained indicated a trend towards increased water content within the structural elements studied. Supported in trials of electrical resistance was possible to know the state of corrosion of steel reinforcement, and to demonstrate the effect of micro-environment on the durability of reinforced concrete building. [ABSTRACT FROM AUTHOR]