Avaliação do Óxido Misto ZrO2/Al2O3/SiO2 como Material Inibidor de Corrosão do Aço Carbono SAE 1020
Palavras-chave:
Óxido misto, ZrO2/Al2O3/SiO2, Inibidor de Corrosão, Aço Carbono.Resumo
Este trabalho apresenta os resultados da avaliação do óxido misto ZrO2/Al2O3/SiO2, produzido pelo processo sol gel, como material inibidor de corrosão do aço carbono SAE 1020. A caracterização física dos óxidos foi realizada por difração de raios-x (DRX), onde revelou a presença das fases cristalinas dos óxidos ZrO2 e Al2O3 nas amostras. A avaliação dos processos de inibição de corrosão do aço carbono foi realizada pela técnica de impedância eletroquímica. Os ensaios foram conduzidos utilizando uma solução eletrolítica de NaCl 3 %, onde verificou-se um aumento nos valores resistivos quando o aço foi recoberto com os óxidos mistos, indicando a inibição dos processos de corrosão. A adição destes óxidos em tinta do tipo epóxi, para recobrir a superfície do aço, mostrou a eficiência dos óxidos frente a inibição da corrosão, quando comparado com o recobrimento do aço somente com a tinta.Referências
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