Effects of carbonate and bicarbonate on corrosion resistance in API 5L steels with heat treatments as Annealing, normalized and herdening and tempering
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Abstract
This document describes the effects of carbonates and bicarbonates on corrosion resistance for API 5L X42 and Grade B steels, these steels were subjected to annealing, normalized, and tempered heat treatments, to then compare them with the supply material looking for differences microstructural, the formation of carbonates or bicarbonates is observed by microscopic techniques in SEM. For this research, indentation resistance tests (Vickers hardness) and impact tests (Charpy PIC450 testing machine) were carried out, the corrosion tests were done with a CO2 saturation for one hour at 99.9% purity, a electrochemical cell, and a Potentiostat / Galvanostat PGSTAT204, and the NOVA 2.1 Software was used for the analysis. From these tests, it was determined that when performing heat treatments, the hardness of the materials improves with respect to the supply material; analyzing corrosion resistance, API 5L X42 normalized steel presents an improvement of 2.54% with respect to the supply material and API 5L Grade B steel improves by 46.47% with respect to the normalized one. In conclusion, hardened API 5L Grade B steel has better corrosion resistance due to the
formation of Iron Carbonates and Calcium Carbonates, verified by EDS.
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Lidia del Rocío Castro-Cepeda, Escuela Superior Politécnica de Chimborazo (ESPOCH) - Ecuador
https://orcid.org/0000-0002-0471-2879
Graduated in 2014 from the Escuela Superior Politécnica de Chimborazo as an Industrial Engineer. In 2017 I obtained a master’s degree in Energy Engineering at the Polytechnic University of Madrid, thanks to a scholarship granted by the Carolina Foundation, where I specialized in the design of electricity generation plants with renewable alternative energies. In 2021 I graduated from the University Master's Degree in Mathematical and Computer Engineering, where I specialized in the application of mathematics in engineering through computational tools.
I have worked as a teacher at the Escuela Superior Politécnica de Chimborazo in the Faculty of Natural Resources and currently I collaborate in the Faculty of Mechanics in the Mechanics career as a research professor.
I carry out research in the GIDETER and GIDENM group, with several research projects in the areas of energy, materials and applied engineering.
Mónica Alexandra Moreno-Barriga, Escuela Superior Politécnica de Chimborazo (ESPOCH) - Ecuador
https://orcid.org/0000-0002-9881-6360
Master’s in integrated systems for Quality, Environment and Safety Management, Industrial Engineer, with a solid academic and professional training developed in the Management Area of private companies, with positions of Management and Headquarters of Industrial Plants of the Food Sector, with capacity in effective decision making and resource management, leadership for human capital management. High spirit of improvement and perseverance in the activities carried out at the work level, evidenced by the fulfillment of goals and proactivity for the development of new projects, complying with responsibility and honesty. Aptitude for conventional computer programs.
Trajectory in the training of learning groups in various areas such as Food, Industrial Safety and Quality. Internal Management Auditor in HACCP at the business level.
Performance as a Teacher for ESPOCH at the ESPOCH School of Mechanical Engineering, in the subjects of General Chemistry, Applied Chemistry and Laboratory and Quality Control, managing Research Project.
Andrés Joao Noguera-Cundar , Escuela Superior Politécnica de Chimborazo (ESPOCH) - Ecuador
0000-0001-6763-9288
Automotive Engineer from ESPOCH, Master's Degree in Mechanical Engineering from the Polytechnic University of Madrid, Special Certifications in basic subjects, Automotive Technical Certification, Service Advisor Certification Professional experience in the automotive workshop administration area. Senescyt Scholar.
Teaching Higher Polytechnic School of Chimborazo from April 2017 to the present date. Within the activities complementary to teaching, I carry out research in the GIDENM group, with the development of research projects in the areas of energy, materials and applied engineering.
Jaime Enrique Chulco-Yancha, Investigador Independiente - Ecuador
0000-0002-7429-6241
Intern at the Research and Development Center of the Ecuadorian Air Force "CIDFAE" for the design, modeling and mechanical analysis of a test bench for DAEWOO aircraft engines, management of various 2D and 3D design packages, financial analysis, management of providers, staff coordinator.
Intern at “FGM” METALMECÁNICA for the design and construction of machines, management of 2D-3D software, as well as Word and Excel programs, equipment maintenance, inventory management, general workshop work (machine tools).
Participation in the event "Week of Science and Technology, entrepreneurship and innovation" -GAD Riobamba, with the presentation of an ecological recycling machine.
Participation in the event "Entrepreneurship", organized by the School of Mechanical Engineering, through the project: Automation of a hydroponic system
Jefferson Miguel Tacuri-Troya, Investigador Independiente - Ecuador
0000-0002-0810-6972
Development of drawings in AutoCAD.
Development of mechanical parts in Solidworks and AutoCAD.
Design and construction of metal structures for roofs.
Reading and interpretation of plans.
Personnel management to fulfill daily tasks according to worksheets
Visual NDT Weld Inspection I
Driving of private vehicles: Car and Truck
Give classes in the areas of Basic Mathematics, Higher Algebra, Functions, Derivatives and Integrals, Geometry and Trigonometry.
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