Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
STUDY OF STABILITY OF Al2O3-Y2O3-TiO2 COMPOSITE CERAMICS IN CRUDE PETROLEUM ENVIRONMENT FOR INERT COATING APPLICATIONS IN PETROLEUM INDUSTRY
Submission Author:
Larissa Albuquerque , PE
Co-Authors:
Bruna Constantino, Ricardo Artur Sanguinetti Ferreira, Yogendra Prasad Yadava, Larissa Albuquerque
Presenter: Milena Lima
doi://10.26678/ABCM.COBEM2017.COB17-1948
Abstract
Petroleum drilling equipment, storage tanks and transportation systems suffer from constant physical stress caused by chemical attack of crude petroleum on its structure. Ceramics have high chemical stability in hostile environment and therefore can be used as an inert coating material to solve such problems. Ceramics based on Alumina are most widely used in practice where there is demand for high strength and toughness but its intrinsic fragility is still a fatal factor. To reduce it and increase strength and toughness usually the ceramics are reinforced with ceramic additives. Mechanical properties of Alumina based ceramics improve with the addition of TiO2, ZrO2 etc. as reinforcement additives. We’ve produced Al2O3-Y2O3-TiO2 ceramics composites in proportions of 5-20 wt% TiO2 and 3% wt% Y2O3 with high mechanical strength, through thermo-mechanical processing and sintering techniques. To evaluate the materials developed and the possibility of using them as ceramics components for petroleum industry, we’ve studied the physic-chemical and mechanical stability of these materials in crude petroleum originated from onshore and offshore petroleum wells of Sergipe-Brazil. Ceramics composite Al2O3-Y2O3-TiO2 were produced through thermo-mechanical processing and sintering techniques. Structural, microstructural and mechanical tests showed that composite ceramics with 15-20wt% TiO2 presented better results in terms of mechanical hardness and microstructural characteristics. The study of stability of composite ceramics in crude petroleum environment showed that ceramics did not present any additional phase except the constituent phases. Microscopy tests and microstructural analysis showed that there is no visible change in these characteristics of ceramics after some days of immersion in petroleum.
Keywords
Al2O3-Y2O3-TiO2, ceramic protective coating, crude petroleum, stability in crude petroleum
