abstract
In this work the effect of several constituents on the performance of water-borne anticorrosive primers was investigated. The behaviour of four resins (acrylic, styrene-acrylate, alkyd and epoxy-ester) was compared with their respective primers. The acrylic formulation was further used to investigate the influence of the pigment volume concentration (PVC), type and quantity of inert pigments and fillers, and anticorrosive pigments. The corrosion protection was assessed by electrochemical impedance spectroscopy (EIS) with samples immersed in 3 % NaCl aqueous solution. The primers presented very low barrier properties but those incorporating anticorrosive pigments showed high charge transfer resistance. Good results were obtained in natural weathering tests and when the primers integrated a paint scheme with a topcoat.
subject category
Chemistry; Materials Science
authors
Bastos, AC
our authors
António Alexandre Cunha Bastos
Assistant ResearcherProjects
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)
acknowledgements
This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC) . The author thanks Fabrica de Tintas 2000 S.A. (Portugal) and Agencia de Inovacao (Portugal) for funding project P-1373 PRIMAQUA.