| Revista: | Materials research |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312719 |
| ISSN: | 1516-1439 |
| Autores: | Rocha, Adriana da Cunha1 Rizzo, Fernando Zeng, Chaoliu2 Paes, Marcelo Piza3 |
| Instituciones: | 1Pontificia Universidade Catolica do Rio de Janeiro, Departamento de Ciencias dos Materiais e Metalurgia, Rio de Janeiro. Brasil 2Chinese Academy of Sciences, Shenyang, Liaoning. China 3Petroleo Brasileiro S.A., Rio de Janeiro. Brasil |
| Año: | 2004 |
| Periodo: | Ene-Mar |
| Volumen: | 7 |
| Número: | 1 |
| Paginación: | 189-194 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Nota breve o noticia |
| Enfoque: | Experimental |
| Resumen en inglés | The application of thermal spray coatings has been effective in preventing corrosion of steel and iron products. It has been used in a wide range of applications spreading from the petroleum to the food industry. In this work, the performance and effectiveness of a two-layered aluminum-based thermal spray coating applied to an ASTM A387 G11 steel was evaluated. The coating structure was comprised of an inner Al-Fe-Cr layer and an outer layer of aluminum. Coated samples were tested in the reactor zone of a fluid catalytic cracking unit (FCCU) of a petrochemical plant for 2.5 years. The reactor zone temperature was about 793 K (520 °C) and the environment was a mixed gas containing sulfur, oxygen and carbon. Laboratory-scale tests were also conducted on the coated samples in order to gain a better understanding of the corrosive effect of the gaseous species present in the FCCU atmosphere. Porosity present in the thermal spray coatings allowed the penetration of the atmosphere corrodents, which instigated intergranular corrosion of the steel substrate. The presence of an inner Al-Fe-Cr layer did not prevent coating spallation, which further contributed to the internal corrosion process |
| Disciplinas: | Ingeniería |
| Palabras clave: | Ingeniería mecánica, Ingeniería metalúrgica, Recubrimientos, Aluminio, Propiedades mecánicas, Acero, Resistencia, Corrosión |
| Keyword: | Engineering, Mechanical engineering, Metallurgical engineering, Coatings, Aluminum, Mechanical properties, Steel, Resistance, Corrosion |
| Texto completo: | Texto completo (Ver HTML) |
