High performance protective coatings for non‐ferrous metals
Abstract
Purpose
The purpose of this paper is to report the use of zinc phosphate pigment as a chromate substitute for coatings on non‐ferrous metals (galvanized steel, pure aluminum, α‐brass and pure copper).
Design/methodology/approach
Paint systems based on zinc chromate and zinc phosphate pigments were prepared. The paints were tested for their physico‐mechanical properties. Testing of the anticorrosive properties of the zinc phosphate pigment in comparison with zinc chromate pigment was carried out by accelerated corrosion exposure, i.e. immersion in 3.5 percent salt solution and exposure for one year at five outdoor stations.
Findings
The possibility of replacing chromate pigment was assessed and the “gap“ observable between the performance of zinc chromate and zinc phosphate pigments was noted.
Originality/value
The non‐toxic inhibitive pigment, zinc phosphate, incorporated into a plasticized‐chlorinated rubber binder, could be applied successfully for the protection of non‐ferrous substrates.
Keywords
Citation
Emira, H.S., Shakour, A.A., Abd El Rehim, S.S., Saleh, I.A. and El‐Hashemy, M.A. (2012), "High performance protective coatings for non‐ferrous metals", Anti-Corrosion Methods and Materials, Vol. 59 No. 3, pp. 139-149. https://doi.org/10.1108/00035591211224681
Publisher
:Emerald Group Publishing Limited
Copyright © 2012, Emerald Group Publishing Limited