Per: fernando brandão rodrigues da silva (Centro Federal de Educação Tecnológica de Minas Gerais), Caio Yasuhiro Kikuchi (Centro Federal de Educação Tecnológica de Minas Gerais), Luana da Silva dos santos (corfal poliuretanos ltda), tiago fernando domenegueti (corfal poliuretanos ltda), taise matte manhabosco (universidade federal de ouro preto)
Abstract:
Metal-polymer composites have shown better physical and mechanical properties than the composite matrix, in addition to overcoming problems such as low adhesion and high permeability, as occurs in polyurethane. This study consisted of developing a composite using magnetic tailing from a phosphate mining company as a reinforcing particle in the polyurethane matrix, in order to evaluate its applicability as a coating for carbon steel pipes. Tailings were used in two size ranges (38 to 53 µm and 53 to 104 µm) and with different percentages (10, 20 and 40% wt). The samples were evaluated for hardness, tensile and tear strength, elongation and abrasion wear, and characterized using SEM-EDS. The CP6 composite (10% wt and 38 to 53 µm) met the parameters required for application as a coating, surpassing polyurethane by 63.3% in tensile strength. The use of tailing with a larger grain size promoted an increase in abrasive wear, while the higher percentage by weight of tailing reduced the hardness of the composite.