Seleção de materiais e revestimentos para o controle de incrustações do mexilhão dourado na Usina Hidrelétrica de Ibitinga (SP, Brasil)

Abstract

Os seguintes materiais e revestimentos apresentaram as menores densidades de mexilhões incrustados: aço carbono revestido com tinta a base de resina epóxi poliamina com adição de óxido de zinco convencional 5%, aço carbono revestido com tinta a base de resina epóxi poliamina com adição de óxido de cobre convencional 10%, aço carbono revestido com tinta a base de resina epóxi poliamina com adição de óxido de zinco nanométrico 10%.Estes materiais são recomendados para a utilização no controle da incrustação do mexilhão dourado, após a realização de estudos complementares sobre a solubilidade, lixiviação e ecotoxicidade, temas que serão abordados em nova fase da pesquisa. Palavras-chaves: tintas antiincrustantes, materiais, Limnoperna fortunei, bioincrustação. Selection of materials and coatings for the incrustation control of the golden mussel in the hydroelectric power station of Ibitinga (SP, Brazil)ABSTRACT Experiments were carried out aiming to select materials and coatings with antifouling properties against the exotic bivalve Limnoperna fortunei at power plants. Different kinds of materials were used as sample: carbon steel, metallic copper, stainless steel, galvanized steel and acrylic.Tests were also performed with several kinds of oxide based coatings at different concentrations on carbon steel samples. Copper oxide, zinc oxide and a combination of them were used. The samples were immersed in water column along a year, from October/2007 to September/2008, at Ibitinga Hydroelectric Power Plant Reservoir in São Paulo State, Brazil.The following materials and coatings showed the lower densities of golden mussel fouling: carbon steel coated with epoxy-polyamine resin based ink with addition of conventional zinc oxide 5%, carbon steel coated with epoxy-polyamine resin based ink with addition of conventional copper oxide 10% and carbon steel coated with epoxy-polyamine resin based ink with addition of nanometric zinc oxide 10%.