resumo
Layered hydroxide salt and layered double hydroxide intercalated respectively with molybdate (LHS-M) and gluconate (LDH-G) were used together for corrosion protection of carbon steel for the first time. Essays revealed that inhibitor release from LHS-M and LDH-G occurred in presence of chloride anions, within different time -scales. Electrochemical studies performed for inhibitors, directly in solution and intercalated into the nano -containers, showed that the protection of carbon steel can be tuned using the right ratio of inhibitors and nanocontainers. Coatings loaded with a mixture of the nanocontainers were applied on carbon steel plates and found to improve the anticorrosion performance, attributed to the inhibitors' action and chloride anions trapping.
palavras-chave
DOUBLE HYDROXIDE; SODIUM GLUCONATE; SMART COATINGS; INHIBITION; MOLYBDATE; ZINC; NANOCONTAINERS; MICROCAPSULES; BEHAVIOR; CRYSTAL
categoria
Materials Science; Physics
autores
Leal, DA; Sousa, I; Bastos, AC; Tedim, J; Wypych, F; Marino, CEB
nossos autores
Isabel Cristina de Sá Correia de Sousa
Investigador Júnior
João Tedim
Professor associadoProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
agradecimentos
This study was financed in part by the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brazil (CAPES) - Finance Code 001, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq-Brazil), and by the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 and LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC)-Portugal. Debora Abrantes Leal thanks CAPES for the PhD scholarship (CAPES/PrInt no 88887.468259/2019-00). Claudia Eliana Bruno Marino and Fernando Wypych are thankful for the CNPq productivity scholarships (C.E.B.M.: 303126/2019-1; F.W.: 300988/2019-2). Besides, the authors would like to thank the M.Sc. Rodrigo Montes for carrying out the EIS measurements for the intact coatings and acknowledge the companies Olin and Smallmatek for kindly providing the epoxy coating components and the LDH-G nanocontainer, respectively.